第一次提交

Class/c7/CenterFrameDemo.java

@@ -0,0 +1,24 @@
+package Class.c7;
+
+import java.awt.Dimension;
+import java.awt.Frame;
+import java.awt.Toolkit;
+
+public class CenterFrameDemo {
+    public static void main(String[] args) {
+        Toolkit tk =Toolkit.getDefaultToolkit();
+        Dimension ScreenSize = tk.getScreenSize();
+        int width = (int)ScreenSize.getWidth()/2;
+        int hight = (int)ScreenSize.getHeight()/2;
+        int x = width/2;
+        int y = hight/2;
+
+
+        Frame f = new Frame();
+        f.setTitle("CenterFrame");
+        f.setSize(width, hight);
+        f.setLocation(x, y);
+        f.setVisible(true);
+        
+    }
+}

Class/c7/FirstGUI.java

@@ -0,0 +1,11 @@
+package Class.c7;
+
+import java.awt.Frame;
+
+public class FirstGUI {
+    public static void main(String[] args) {
+        Frame f = new Frame("My Fist Gui");
+        f.setBounds(100,100,200,100);
+        f.setVisible(true);   
+    }
+}

cn/gdpu/roleExpansion.java

@@ -0,0 +1,5 @@
+package cn.gdpu;
+
+public interface roleExpansion {
+    void finishingMove();
+}

com/experiment/DragonSlayer.java

@@ -0,0 +1,16 @@
+package com.experiment;
+
+public class DragonSlayer extends Role {
+
+    public DragonSlayer(){
+        super("屠龙者", "0001", 10000);
+    }
+
+    public DragonSlayer(String name, String id, int health){
+        super(name, id, health);
+    }
+
+    public void finishingMove(){
+        System.out.println(getName()+"发动了"+"降龙掌");
+    }
+}

com/experiment/FingerMan.java

@@ -0,0 +1,16 @@
+package com.experiment;
+
+public class FingerMan extends Role {
+
+    public FingerMan(){
+        super("段氏", "0003", 9000);
+    }
+
+    public FingerMan(String name, String id, int health){
+        super(name, id, health);
+    }
+
+    public void finishingMove(){
+        System.out.println(getName()+"发动了"+"一阳指");
+    }
+}

com/experiment/Role.java

@@ -0,0 +1,49 @@
+package com.experiment;
+
+import cn.gdpu.roleExpansion;
+
+public abstract class Role implements roleExpansion{
+    private String name;
+    private String id;
+    private int health;
+
+    public void setName(String name){
+        this.name = name;
+    }
+
+    public void setID(String id){
+        this.id = id;
+    }
+
+    public void setHealth(int health){
+        this.health = health;
+    }
+
+    public String getName(){
+        return this.name;
+    }
+
+    public String getID(){
+        return this.id;
+    }
+
+    public int getHealth(){
+        return this.health;
+    }
+
+    public Role(){
+        setName("人机");
+        setID("0000");
+        setHealth(1000);
+    }
+
+    public Role(String name, String id, int health){
+        setName(name);
+        setID(id);
+        setHealth(health);
+    }
+
+    public void move(){
+        System.out.println("");
+    }
+}

com/experiment/SwordSaint.java

@@ -0,0 +1,16 @@
+package com.experiment;
+
+public class SwordSaint extends Role {
+
+    public SwordSaint(){
+        super("剑圣", "0002", 8000);
+    }
+
+    public SwordSaint(String name, String id, int health){
+        super(name, id, health);
+    }
+
+    public void finishingMove(){
+        System.out.println(getName()+"发动了"+"六脉剑");
+    }
+}

exp1/3.java

@@ -0,0 +1 @@
+package exp1;

exp1/Compare.java

@@ -0,0 +1,31 @@
+package exp1;
+//这段代码用于获取三个数据并输出其中的最大值
+//编写于 2024.2.27
+//Java核心技术(实验一)课堂任务
+
+import java.util.Scanner;
+
+public class Compare{
+	public static void main(String[] args)
+	{
+		Scanner scan =new Scanner(System.in);
+
+		System.out.print("请输入第一个数字: ");
+		int a = scan.nextInt();
+
+		System.out.print("请输入第二个数字: ");
+		int b = scan.nextInt();
+
+		System.out.print("请输入第三个数字: ");
+		int c = scan.nextInt();
+
+		scan.close();
+
+		int max = 0;
+		if(a>b && a>c) {max = a;}
+		else if(b>a && b>c) {max = b;}
+		else if(c>a && c>b) {max = c;}
+
+		System.out.println("最大数是:" + max);
+	}
+}

exp1/Score.java

@@ -0,0 +1,27 @@
+package exp1;
+
+import java.util.Scanner;
+
+public class Score {
+    public static void main(String[] args){
+        Scanner scan = new Scanner(System.in);
+        System.out.print("请输入百分制成绩： ");
+        int score = scan.nextInt();
+        scan.close();
+
+        if(score>100 || score<0){
+            System.out.println("输入错误");
+        }else if(score>=90 && score<=100){
+            System.out.println("优秀");
+        }else if(score>=80 && score<90){
+            System.out.println("良好");
+        }else if(score>=70 && score<80){
+            System.out.println("中等");
+        }else if(score>=60 && score<70){
+            System.out.println("及格");
+        }else{
+            System.out.println("不及格");
+        }
+    }
+    
+}

exp1/Smp3.java

@@ -0,0 +1,14 @@
+package exp1;
+
+public class Smp3
+{
+   public static void main(String[] args)
+   {
+      int a;
+      a = (int)3L * 4;
+      System.out.println(a);
+      float b;
+      b = (float)3.2 * 4;
+      System.out.println(b);
+   }
+}

exp1/calculate.java

@@ -0,0 +1,9 @@
+package exp1;
+
+public class calculate {
+    public static void main(String[] args){
+        int c;
+        c = 0b10100001 & 0b10000000;
+        System.out.println(Integer.toBinaryString(c));
+    }
+}

exp10/CopyFile.java

@@ -0,0 +1,67 @@
+package exp10;
+
+import java.io.*;
+
+public class CopyFile {
+    public static void main(String[] args) {
+        String dirPath = "D:/MyProjects/CoreJava/exp10/MultiFile"; //源文件路径
+        String dstPath = "C:/test.java"; //目标文件路径
+        File dir = new File(dirPath);
+        File dst = new File(dstPath);
+        File[] files = dir.listFiles();
+
+        try{ //通过三种方式将源文件复制到目标文件中
+            charCopy(files[0], dst);
+            charArryCopy(files[1], dst);
+            bufferCopy(files[2], dst);
+        }catch(IOException e){
+            System.out.println("程序因为IO异常结束运行!");
+        }
+        
+    }
+
+    //一次一个字节地读写
+    public static void charCopy(File src, File dst) throws IOException{
+        InputStream in = new FileInputStream(src);
+        OutputStream out = new FileOutputStream(dst, true);
+        int b;
+
+        while ((b=in.read()) != -1){
+            out.write(b);
+        }
+
+        in.close();
+        out.close();
+    }
+
+    //一次一个季节数组地读写
+    public static void charArryCopy(File src, File dst) throws IOException{
+        InputStream in = new FileInputStream(src);
+        OutputStream out = new FileOutputStream(dst, true);
+        byte[]  buffer = new byte[1024];
+        int size;
+
+        while((size=in.read(buffer)) != -1){
+            out.write(buffer, 0, size);;
+        }
+
+        in.close();
+        out.close();
+    }
+
+    //缓冲字节流读写
+    public static void bufferCopy(File src, File dst) throws IOException{
+        BufferedInputStream in = new BufferedInputStream(new FileInputStream(src));
+        BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(dst, true));
+        byte[]  buffer = new byte[1024];
+        int size;
+
+        while((size=in.read(buffer)) != -1){
+            out.write(buffer, 0, size);;
+        }
+        out.flush();
+
+        in.close();
+        out.close();
+    }
+}

exp10/ListFiles.java

@@ -0,0 +1,27 @@
+package exp10;
+
+import java.io.File;
+
+public class ListFiles {
+    public static void main(String[] args) {
+        String dirPath = "D:/JavaFile"; //要扫描的路径
+        list(dirPath);
+    }
+
+    //递归遍历dirPath里的所有文件,并打印java文件的绝对路径
+    public static void list(String dirpath){
+        File dir = new File(dirpath);
+        String[] files = dir.list();    //获取该文件夹内的所有文件
+        for (String filename: files){
+            String filePath = dirpath+"/"+filename;
+            File f = new File(filePath);
+            if(f.isDirectory()){ //如果是文件夹则递归遍历
+                list(filePath);
+            }else if(f.getName().endsWith(".java")){ //如果是java文件则打印绝对路径
+                System.out.println(filePath);
+            }else{
+
+            }
+        }
+    }
+}

exp10/MultiFile/file1.java

@@ -0,0 +1,2 @@
+package exp10.MultiFile;
+public class file1 {}

exp10/MultiFile/file2.java

@@ -0,0 +1,2 @@
+package exp10.MultiFile;
+public class file2 {}

exp10/MultiFile/file3.java

@@ -0,0 +1,2 @@
+package exp10.MultiFile;
+public class file3 {}

exp11/AccountDemo.java

@@ -0,0 +1,7 @@
+package exp11;
+
+import javax.swing.*;
+
+public class AccountDemo {
+    JFrame rejister = new JFrame();
+}

exp2/Read.java

@@ -0,0 +1,50 @@
+package exp2;
+
+class Person {
+	//姓名
+	String name;
+	//年龄
+	int age;
+	//国籍
+	//String country;
+	static String country;
+	
+	public Person(){}
+	
+	public Person(String name,int age) {
+		this.name = name;
+		this.age = age;
+	}
+	
+	public Person(String name,int age,String country) {
+		this.name = name;
+		this.age = age;
+		Person.country = country;
+	}
+	
+	public void show() {
+		System.out.println("姓名："+name+",年龄："+age+",国籍："+country);
+	}
+}
+
+class PersonDemo {
+	public static void main(String[] args) {
+		//创建对象1
+		Person p1 = new Person("邓丽君",16,"中国");
+		p1.show();
+		
+		//创建对象2
+		Person p2 = new Person("杨幂",22);
+		p2.show();
+		
+		//创建对象3
+		Person p3 = new Person("凤姐",20);
+		p3.show();
+		
+		Person.country = "美国";
+		p3.show();
+		
+		p1.show();
+		p2.show();
+	}
+}

exp2/StudentTest.java

@@ -0,0 +1,59 @@
+package exp2;
+
+//学生类
+class Student {
+    private String name;
+    private String age;
+    
+    //无参构造
+    public Student() {
+        this.name = "张三";
+        this.age = "38";
+    }
+
+    //带参构造
+    public Student(String name, String age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    void show(){
+        System.out.println(this.name);
+        System.out.println(this.age);
+    }
+
+    //设置姓名
+    static void setName(Student s, String name) {
+        s.name = name;
+    }
+
+    //设置年龄
+    static void setAge(Student s, String age) {
+        s.age = age;
+    }
+
+    //进行学习行为
+    static void study(Student s) {
+        System.out.println(s.name+"学习");
+    }
+
+    //进行考试行为
+    static void exam(Student s) {
+        System.out.println(s.name+"考试");
+    }
+
+}
+
+
+//测试类
+public class StudentTest {
+    public static void main(String[] args) {
+        //创建学生s1
+        Student s1 = new Student();
+        Student s2 = new Student("李四", "36");
+
+        Student.study(s1);
+        Student.exam(s2);
+    }
+    
+}

exp3/Animal.java

@@ -0,0 +1,32 @@
+package exp3;
+
+public class Animal {
+    //成员变量
+    String name;
+    int weight;
+    String color;
+    
+    //无参构造
+    public Animal(){
+        this.weight = 2;
+        this.color = "黑色";
+        this.name = "Animal";
+    }
+
+    //全参构造
+    public Animal(String name,int weight, String color){
+        this.name = name;
+        this.color = color;
+        this.weight = weight;
+    }
+
+    //动作-行走
+    void walk(){
+        System.out.println(this.name+"行走...");
+    }
+
+    //动作-奔跑
+    void run(){
+        System.out.println(this.name+"奔跑...");
+    }
+}

exp3/AnimalExtendsTest.java

@@ -0,0 +1,13 @@
+package exp3;
+
+public class AnimalExtendsTest {
+    public static void main(String[] args){
+        Cat cat = new Cat();
+        Dog dog = new Dog("大黄", 5, "黄色", "金毛");
+
+        cat.walk();
+        cat.miaow();
+        dog.run();
+        dog.bark();
+    }
+}

exp3/Car.java

@@ -0,0 +1,21 @@
+package exp3;
+
+public class Car extends Vehicle {
+    //成员属性
+    int loader;
+    
+    public Car(){
+        super();
+        this.loader = 0;
+    }
+
+    public Car(String brand, int wheels, float weight, int loader){
+        super(brand, wheels, weight);
+        this.loader = loader;
+    }
+
+    void show(){
+        super.show();
+        System.out.println("载人数: "+this.loader);
+    }
+}

exp3/Cat.java

@@ -0,0 +1,24 @@
+package exp3;
+
+public class Cat extends Animal {
+    //成员属性
+    String breed;
+
+    //无参构造
+    public Cat(){
+        super();
+        this.breed = "橘猫";
+    }
+
+    //全参构造
+    public Cat(String name, int weight, String color, String breed){
+        super(name, weight, color);
+        this.breed = breed;
+    }
+
+    //行为-喵喵叫
+    public void miaow(){
+        System.out.println(this.name+"在喵喵叫");
+    }
+
+}

exp3/Dog.java

@@ -0,0 +1,24 @@
+package exp3;
+
+public class Dog extends Animal {
+    //成员属性
+    String breed;
+
+    //无参构造
+    public Dog(){
+        super();
+        this.breed = "中华田园犬";
+    }
+
+    //全参构造
+    public Dog(String name, int weight, String color, String breed){
+        super(name, weight, color);
+        this.breed = breed;
+    }
+
+    //行为-吠叫
+    void bark(){
+        System.out.println(this.name+"在吠叫");
+    }
+
+}

exp3/ExtendsDemo.java

@@ -0,0 +1,88 @@
+package exp3;
+
+
+//类-人
+class Person{
+    //成员变量
+    String name;    //姓名
+    int age;    //年龄
+
+    //无参构造"人"
+    public Person(){
+        this.name = "无名";
+        this.age = 18;
+    }
+
+    //有参构造"人"
+    public Person(String name, int age){
+        this.name = name;
+        this.age = age;
+    }
+
+
+    //设置姓名
+    void setName(String name){
+        this.name = name;
+    }
+
+    //设置年龄
+    void setAge(int age){
+        this.age = age;
+    }
+
+    //行为-吃饭
+    void eat(Person p){
+        System.out.println(p.name+"吃饭");
+    }
+
+    //行为-睡觉
+    void sleep(Person p){
+        System.out.println(p.name+"睡觉");
+    }
+}
+
+
+//类-学生  继承自类-人
+class Student extends Person{
+    //成员变量
+    String id;
+
+    //无参构造
+    public Student(){
+        super();
+        this.id = "0000";
+    }
+
+    //有参构造
+    public Student(String name, int age, String id){
+        super(name, age);
+        this.id = id;
+    }
+
+    //设置id
+    void setId(String id){
+        this.id = id;
+    }
+
+    //行为-学习
+    void study(Student s){
+        System.out.println(s.name+"学习");
+    }
+
+    //方法-展示信息
+    void show(){
+        System.out.println("姓名: "+this.name);
+        System.out.println("年龄: "+this.age);
+        System.out.println("学号: "+this.id+"\n");
+    }
+}
+
+public class ExtendsDemo {
+    public static void main(String[] args){
+        Student s1 = new Student();
+        Student s2 = new Student("梦之空", 20, "2230502119");
+
+        s1.show();;
+        s2.show();
+    }
+}

exp3/Line.java

@@ -0,0 +1,37 @@
+package exp3;
+
+import java.lang.Math;
+
+class Line extends Point{
+	protected int x,y;  
+
+	Line(int a,int b){   
+		super(a,b);  
+		setLine(a,b);  
+	}  
+
+	public void setLine(int x,int y)  {  
+		this.x=x+x;   
+		this.y=y+y;  
+	}   
+
+	public double length(){  
+		int x1=super.x,y1=super.y,x2=this.x,y2=this.y;  
+		return Math.sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));  
+	}  
+	public String toString(){  
+		return "直线端点：["+super.x+","+super.y+"]["+x+","+y+"]直线长度："+this.length();  
+	}
+	public int getX() {
+		return x;
+	}
+	public int getY() {
+		return y;
+	}
+	public void setX(int x) {
+		this.x = x;
+	}
+	public void setY(int y) {
+		this.y = y;
+	} 
+} 

exp3/LineDemo.java

@@ -0,0 +1,8 @@
+package exp3;
+
+public class LineDemo { 
+	public static void main(String args[]){    
+		Line line = new Line(50,50); 
+		System.out.println("\n"+line.toString());  
+	}
+} 	

exp3/Point.java

@@ -0,0 +1,15 @@
+package exp3;
+
+class Point{  
+	protected int x,y; 
+    Point(){}
+
+	Point(int a,int b){    
+		setPoint(a,b);  
+	}
+    
+	public void setPoint(int a,int b){   
+		x=a;
+		y=b;  
+	}  
+}  

exp3/Trunk.java

@@ -0,0 +1,21 @@
+package exp3;
+
+public class Trunk extends Car {
+    //成员属性
+    float payload;
+    
+    public Trunk(){
+        super();
+        this.payload = 0;
+    }
+
+    public Trunk(String brand, int wheels, float weight, int loader, float payload){
+        super(brand, wheels, weight, loader);
+        this.payload = payload;
+    }
+
+    void show(){
+        super.show();
+        System.out.println("载重数: "+this.payload);
+    }
+}

exp3/Vehicle.java

@@ -0,0 +1,28 @@
+package exp3;
+
+public class Vehicle {
+    //成员属性
+    String brand;   //品牌
+    int wheels;     //车轮数
+    float weight;   //重量
+    
+    public Vehicle(){
+        this.brand = "无品牌";
+        this.wheels = 0;
+        this.weight = 0;
+    }
+
+    public Vehicle(String brand, int wheels, float weight){
+        this.brand = brand;
+        this.wheels = wheels;
+        this.weight = weight;
+    }
+
+    void show(){
+        System.out.println("enter super class method...");
+        System.out.println("品牌: "+this.brand);
+        System.out.println("车轮数: "+this.wheels);
+        System.out.println("重量: "+this.weight);
+    }
+
+}

exp3/VehicleClient.java

@@ -0,0 +1,23 @@
+package exp3;
+
+public class VehicleClient
+{
+	 public static void main(String args[])
+	 {
+		System.out.println("输出相关数据");
+		Car car=new Car("",4,1500,4);  //创建一个Car类对象
+		car.show();
+		Trunk trunk=new Trunk("", 8,7000,3,25000);
+		trunk.show();
+		Vehicle vehicle= new Car("", 4,2000,4);
+		vehicle.show();
+		if(vehicle instanceof Car){
+			((Car)vehicle).show();
+		}
+		else{
+			System.out.println("不能强制转换类型！");
+		}		
+        vehicle=new Trunk("", 9,8000,4,30000);
+		vehicle.show();
+	}
+}

exp3/test.java

@@ -0,0 +1,48 @@
+package exp3;
+
+class A{
+    int sum,num1,num2;
+   public A(){
+       num1=10;
+       num2=20;
+       sum=0;
+   }
+   void sum1(){
+       sum=num1+num2;
+       System.out.println("sum="+num1+"+"+num2+"="+sum);   	
+   }
+   void sum2(int n){
+       num1=n;
+       sum=num1+num2;
+       System.out.println("sum="+num1+"+"+num2+"="+sum);   	
+   }
+}
+
+class B extends A{
+    int num2;
+   public B(){
+       num2=200;
+   }
+   void sum2(){
+       sum=num1+num2;
+       System.out.println("sum="+num1+"+"+num2+"="+sum);
+   }
+   void sum2(int n){
+       num1=n;
+       sum=num1+num2;
+       System.out.println("sum="+num1+"+"+num2+"="+sum);
+   }
+   void sum3(int n){
+       super.sum2(n);
+       System.out.println("sum="+num1+"+"+num2+"="+sum);
+   }
+}
+public class test{
+    public static void main (String arg[]){
+        B m=new B();
+       m.sum1();
+       m.sum2();
+       m.sum2(50);
+       m.sum3(50);
+   }
+}

exp4/AnimalTool.java

@@ -0,0 +1,62 @@
+package exp4;
+
+abstract class Animal{
+    String name;
+    int age;
+
+    public Animal(){};
+    public Animal(String name, int age){
+        this.name = name;
+        this.age = age;
+    }
+
+    abstract void eat();
+    abstract void show();
+}
+
+class Cat extends Animal{
+    public Cat(){};
+    public Cat(String name, int age){
+        super(name, age);
+    }
+
+    void eat(){
+        System.out.println("猫吃鱼");
+    }
+
+    void show(){
+        System.out.println(this.name+","+this.age);
+    }
+}
+
+class Dog extends Animal{
+    public Dog(){};
+    public Dog(String name, int age){
+        super(name, age);
+    }
+
+    void eat(){
+        System.out.println("狗吃肉");
+    }
+
+    void show(){
+        System.out.println(this.name+","+this.age);
+    }
+}
+
+
+public class AnimalTool {
+    public static void main(String[] args){
+        Animal a = new Cat();
+        Animal b = new Dog("旺财", 3);
+
+        a.name = "Tom";
+        a.age = 999;
+
+        a.show();
+        b.show();
+
+        a.eat();
+        b.eat();
+    }
+}

exp4/PolymorphicDemo.java

@@ -0,0 +1,25 @@
+package exp4;
+
+class A{
+    String member = "fu";
+
+    void show(){
+        System.out.println(this.member);
+    }
+}
+
+class B extends A{
+    String member = "zi";
+
+    void show(){
+        System.out.println(this.member);
+    }
+}
+
+public class PolymorphicDemo {
+    public static void main(String[] args){
+        A a = new B();
+        a.show();
+        System.out.println(a.member);
+    }
+}

exp4/PolymorphismTest.java

@@ -0,0 +1,30 @@
+package exp4;
+
+public class PolymorphismTest {	
+	public static void main(String[] args) {
+		Student[] studentArray = new Student[5];
+		studentArray[1] = new Undergraduate("鲁向东");  //本科生鲁向东
+		studentArray[0] = new Undergraduate("陈建平"); 	 //本科生陈建平
+		studentArray[2] = new Postgraduate("匡晓华"); 	//研究生匡晓华
+		studentArray[3] = new Undergraduate("周丽娜");	//本科生周丽娜
+		studentArray[4] = new Postgraduate("梁欣欣");	//研究生梁欣欣
+		 
+		 for (int i=0; i<studentArray.length;i++) {
+			 studentArray[i].setCourseScore(0,87);
+			 studentArray[i].setCourseScore(1,90);
+			 studentArray[i].setCourseScore(2,78);
+		 }
+	     for (int i=0; i<5 ;i++) {
+	    	 studentArray[i].calculateGrade();
+		 }
+	     System.out.println("姓名" + "     类型" +"    成绩");
+		 System.out.println("-----------------------");
+
+		 for (int i=0; i<5 ;i++) {		   
+	       System.out.println(studentArray[i].getName( )+"   "+
+	    		   studentArray[i].getType( )+"  "+
+	    		   studentArray[i].getCourseGrade( ));
+		 }
+	  }
+}    
+

exp4/Postgraduate.java

@@ -0,0 +1,34 @@
+package exp4;
+
+class Postgraduate extends Student {  
+    public Postgraduate(String name)
+    {
+       super(name,"研究生");	 
+    }   
+    public void calculateGrade()
+    {
+        int total = 0;
+        double average = 0;
+        for (int i = 0; i < CourseNo; i++) {
+            total =total + getCourseScore(i);
+        };
+        average = total / CourseNo;
+        String currentGrade="";
+        if (average>=90){ 
+            currentGrade = "优秀";
+        }
+        else if (average>=80&&average<90) {
+            currentGrade = "良好";
+        }
+        else if (average>=70&&average<80) {
+            currentGrade = "一般";
+        }
+        else if (average>=60&&average<70) {
+            currentGrade = "及格";
+        }
+        else{
+            currentGrade = "不及格";
+        }	
+        setCourseGrade(currentGrade);
+     }
+ }

exp4/ShapeDemo.java

@@ -0,0 +1,74 @@
+package exp4;
+
+abstract class Shapes  {
+    public  int x,y; //x，y为的坐标  
+    public  int width,height;   
+    public  Shapes(int x,int y,int width,int height)  {    
+        this.x = x;
+        this.y = y;
+        this.width = width;
+        this.height = height;
+    }   
+    public abstract double getArea();  
+    public abstract double getPerimeter(); 
+    public abstract void show();
+    }
+
+    class Rectangle extends Shapes{
+        double a;
+        double b;
+
+        Rectangle(double a, double b){
+            super(0, 0, 0, 0);
+            this.a=a;
+            this.b=b;
+        }
+
+        public double getArea(){
+            return a*b;
+        }
+
+        public double getPerimeter(){
+            return (a+b)*2;
+        }
+
+        public void show(){
+            System.out.println("矩形  长:"+this.a+"宽:"+this.b);
+        }
+    }
+
+    class Circle extends Shapes{
+        double radius;//半径
+        
+        Circle(double radius){
+            super(0, 0, 0, 0);
+            this.radius=radius;
+        }
+        
+        public double getArea(){
+            return 3.14159265324*radius*radius;
+        }
+
+        public double getPerimeter(){
+            return 3.14159265324*radius*2;
+        }
+
+        public void show(){
+            System.out.println("圆  半径:"+this.radius);
+        }
+    }
+
+
+public class ShapeDemo {
+    public static void main(String[] args){
+        Shapes r = new Rectangle(2, 3);
+        Shapes c = new Circle(5);
+
+        r.show();
+        System.out.println("面积:"+r.getArea()+"  周长:"+r.getPerimeter()+"\n");
+
+        c.show();
+        System.out.println("面积:"+c.getArea()+"  周长:"+c.getPerimeter()+"\n");
+         
+    }
+}

exp4/Student.java

@@ -0,0 +1,56 @@
+package exp4;
+
+public abstract class Student {
+    final static int CourseNo = 3;  
+    private String name;
+	  private String type;
+    private int[]  courses;    
+    private String  courseGrade;  
+    public Student(){
+    	
+    }
+    public Student(String name,String type)
+    {
+        this.name = name;
+        this.type = type;
+        courses = new int[3];
+        courseGrade=""; 
+    }    
+    public abstract void calculateGrade();     
+	  public String getName( )
+    {
+      	return name;
+    }
+	  public String getType( )
+    {
+         return type; //返回学生类型
+    }
+	  public String getCourseGrade( )
+    {
+      return courseGrade;
+    }
+   
+    public int getCourseScore(int courseNumber)
+    {
+      return courses[courseNumber];
+    }    
+    
+    public void setName(String name)
+    {
+      this.name = name;
+    }
+
+	  public void setType(String type)
+    {
+      this.type = type;
+    }
+  
+    public void setCourseScore(int courseNumber, int courseScore)
+    {
+        courses[courseNumber] = courseScore;//按课程索引号设置课程成绩
+    }
+	public void setCourseGrade(String courseGrade) {
+		this.courseGrade = courseGrade;
+	}
+}
+

exp4/Undergraduate.java

@@ -0,0 +1,33 @@
+package exp4;
+
+class Undergraduate extends Student {   
+    public Undergraduate(String name) 
+	{
+        super(name,"本科生");		
+    }
+    public void calculateGrade() {
+      int total = 0;
+	  double average = 0;
+      for (int i = 0; i < CourseNo; i++) {
+         total=total+getCourseScore(i); // 累加各门课程成绩
+      };
+      average = total / CourseNo;
+      String currentGrade="";
+      if (average>=80&&average<100){ 
+    	  currentGrade = "优秀";
+      }
+	  else if (average>=70&&average<80){ 
+		  currentGrade = "良好";
+	  }
+	   else if (average>=60&&average<70){ 
+		   currentGrade = "一般";
+	   }
+	   else if (average>=50&&average<60){
+		   currentGrade = "及格";
+	   }	   
+	   else{
+		   currentGrade = "不及格";
+	   }	  
+      setCourseGrade(currentGrade);
+    }
+}

exp5/Outer.java

@@ -0,0 +1,21 @@
+package exp5;
+
+class Outer {
+    public int num = 10;
+    class Inner {
+        public int num = 20;
+        public void show() {
+            int num = 30;
+            System.out.println(num);
+            System.out.println(this.num);
+            System.out.println(Outer.this.num);
+        }
+    }
+
+    public static void main(String[] args){
+        Outer outer = new Outer();
+        Outer.Inner inner = outer.new Inner();
+
+        inner.show();
+    }
+}

exp5/OuterDemo.java

@@ -0,0 +1,18 @@
+package exp5;
+
+interface Inter { void show(); }
+	class Outer1 { public static Inter method() {
+        return new Inter() {
+            @Override
+            public void show() {
+                System.out.println("HelloWorld");
+            }
+        };
+    } 
+}
+
+class OuterDemo {
+	public static void main(String[] args) {
+	      Outer1.method().show();
+	  }
+}

exp5/PersonDancerDemo.java

@@ -0,0 +1,33 @@
+package exp5;
+
+abstract class Person {
+	public abstract void show();
+}
+
+class Dancer extends Person {
+	@Override
+	public void show() {
+		System.out.println("Dancing!!!");
+	}
+}
+
+class PersonTool {
+	public void method(Person p) {
+		p.show();
+	}
+}
+
+public class PersonDancerDemo {
+	public static void main(String[] args) {
+		PersonTool pd = new PersonTool();
+		Person p = new Dancer();
+		pd.method(p);
+		System.out.println("----------------");
+		pd.method(new Person() {
+			@Override
+			public void show() {
+				System.out.println("Dancing!!!");
+			}
+		});
+	}
+}

exp5/RoleDemo.java

@@ -0,0 +1,33 @@
+package exp5;
+
+import com.experiment.DragonSlayer;
+import com.experiment.FingerMan;
+import com.experiment.SwordSaint;
+
+public class RoleDemo {
+    public static void main(String[] args){
+        DragonSlayer d = new DragonSlayer();
+        SwordSaint s = new SwordSaint();
+        FingerMan f = new FingerMan();
+
+        System.out.println(d.getName()+"加入战斗");
+        System.out.println(s.getName()+"加入战斗");
+        System.out.println(f.getName()+"加入战斗");
+        System.out.println("\n作战开始!\n");
+
+        /*交互
+         * 战斗过程...
+         * 以后再写^v^
+         */
+        System.out.println("***激烈的战斗过程***\n");
+
+        d.finishingMove();
+        s.finishingMove();
+        f.finishingMove();
+
+    
+        System.out.println("\n全死了!\n");
+
+        System.out.println("\n战斗结束\n");
+    }
+}

exp6/AdapterDemo.java

@@ -0,0 +1,29 @@
+package exp6;
+
+interface InnerAnonymousInterface {
+    void fun1();
+    void fun2();
+    void fun3();
+}
+    
+abstract class Outer implements InnerAnonymousInterface{
+}
+
+
+public class AdapterDemo {
+    public static void main(String[] args) {
+        Outer o = new Outer(){
+            public void fun1(){
+                System.out.println("方法1");
+            }
+            public void fun2(){
+                System.out.println("方法2");
+            }
+            public void fun3(){
+                System.out.println("方法3");
+            }
+        };
+
+        o.fun1();
+    }
+}

exp6/Calculator.java

@@ -0,0 +1,24 @@
+package exp6;
+
+import java.util.Scanner;
+
+public class Calculator {
+    public static void main(String[] args) {
+        double a, b;
+        String opType;
+        Scanner in =new Scanner(System.in);
+
+        System.out.print("请输入第一个数: ");
+        a = in.nextDouble();
+        System.out.print("请输入第二个数: ");
+        b = in.nextDouble();
+        System.out.print("请选择运算(+-*/): ");
+        opType = in.next();
+        in.close();
+
+        Operation op = OperationFactory.createOperate(opType);
+        op.setNumber(a, b);
+        
+        System.out.println("结果是: "+op.result());
+    }
+}

exp6/Operation.java

@@ -0,0 +1,14 @@
+package exp6;
+
+public abstract class Operation {
+    double a;
+    double b;
+
+    public void setNumber(double a, double b){
+        this.a = a;
+        this.b = b;
+    }
+
+    abstract double result();
+    
+}

exp6/OperationAddtion.java

@@ -0,0 +1,8 @@
+package exp6;
+
+public class OperationAddtion extends Operation{
+
+    double result(){
+        return a+b;
+    } 
+}

exp6/OperationDivision.java

@@ -0,0 +1,8 @@
+package exp6;
+
+public class OperationDivision extends Operation{
+   
+    double result(){
+        return a/b;
+    } 
+}

exp6/OperationFactory.java

@@ -0,0 +1,24 @@
+package exp6;
+
+public class OperationFactory {
+	public static Operation createOperate(String operate) {
+		Operation oper = null;
+		switch(operate) {
+		case "+":
+			oper = new OperationAddtion();
+			break;
+		case "-":
+			oper = new OperationSubtraction();
+			break;
+		case "*":
+			oper = new OperationMultiplication();
+			break;
+		case "/":
+			oper = new OperationDivision();
+			break;
+			
+		}
+		return oper;
+				
+	}
+}

exp6/OperationMultiplication.java

@@ -0,0 +1,8 @@
+package exp6;
+
+public class OperationMultiplication extends Operation{
+  
+    double result(){
+        return a*b;
+    } 
+}

exp6/OperationSubtraction.java

@@ -0,0 +1,8 @@
+package exp6;
+
+public class OperationSubtraction extends Operation{
+
+    double result(){
+        return a-b;
+    } 
+}

exp7/ButtonChangeColor.java

@@ -0,0 +1,54 @@
+package exp7;
+
+import javax.swing.*;  
+import java.awt.*;  
+import java.awt.event.ActionEvent;  
+import java.awt.event.ActionListener;  
+  
+public class ButtonChangeColor {  
+    public static void main(String[] args) {  
+        // 创建并设置JFrame实例  
+        JFrame frame = new JFrame("按钮改变字体颜色");  
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 设置关闭操作为退出程序  
+        frame.setSize(400, 200); // 设置窗体大小  
+        frame.setLocationRelativeTo(null);
+  
+        // 设置窗体布局为FlowLayout  
+        frame.setLayout(new FlowLayout());  
+  
+        // 创建标签用于显示文本  
+        JLabel label = new JLabel("点击按钮改变字体颜色");  
+        frame.add(label); // 将标签添加到窗体  
+  
+        // 创建三个按钮并添加到窗体  
+        JButton redButton = new JButton("红色");  
+        redButton.addActionListener(new ActionListener() {  
+            @Override  
+            public void actionPerformed(ActionEvent e) {  
+                label.setForeground(Color.RED); // 设置标签字体颜色为红色  
+            }  
+        });  
+        frame.add(redButton);  
+  
+        JButton greenButton = new JButton("绿色");  
+        greenButton.addActionListener(new ActionListener() {  
+            @Override  
+            public void actionPerformed(ActionEvent e) {  
+                label.setForeground(Color.GREEN); // 设置标签字体颜色为绿色  
+            }  
+        });  
+        frame.add(greenButton);  
+  
+        JButton blueButton = new JButton("蓝色");  
+        blueButton.addActionListener(new ActionListener() {  
+            @Override  
+            public void actionPerformed(ActionEvent e) {  
+                label.setForeground(Color.BLUE); // 设置标签字体颜色为蓝色  
+            }  
+        });  
+        frame.add(blueButton);  
+  
+        // 显示窗体  
+        frame.setVisible(true);  
+    }  
+}

exp7/EventExit.java

@@ -0,0 +1,15 @@
+package exp7;
+
+import javax.swing.JFrame;;
+
+public class EventExit {
+    public static void main(String[] args) {
+        JFrame f = new JFrame("窗体关闭事件");
+        f.setDefaultCloseOperation(3);
+        f.setSize(400, 200);
+        f.setLocationRelativeTo(null);
+
+        
+        f.setVisible(true);
+    }
+}

exp7/QQLongin.java

@@ -0,0 +1,38 @@
+package exp7;
+
+import java.awt.*;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JTextField;
+
+
+public class QQLongin {
+    public static void main(String[] args) {
+        JFrame f = new JFrame("QQ登录");
+        f.setDefaultCloseOperation(3);
+        f.setSize(600, 400);
+        f.setLocationRelativeTo(null);
+        f.setLayout(new GridBagLayout());
+
+        JLabel idText = new JLabel("账号");
+        f.add(idText);
+
+        JTextField idField = new JTextField();
+        f.add(idField);
+
+        JLabel pwdText = new JLabel("密码");
+        f.add(pwdText);
+
+        JTextField pwdField = new JTextField();
+        f.add(pwdField);
+
+        JButton loginButton = new JButton("登录");
+        JButton registerButton = new JButton("注册");
+        f.add(loginButton);
+        f.add(registerButton);
+
+        f.setVisible(true);
+    }
+}

exp7/Stest.java

@@ -0,0 +1,43 @@
+package exp7;
+
+import java.awt.EventQueue;
+
+import javax.swing.JFrame;
+
+public class Stest {
+
+	private JFrame frame;
+
+	/**
+	 * Launch the application.
+	 */
+	public static void main(String[] args) {
+		EventQueue.invokeLater(new Runnable() {
+			public void run() {
+				try {
+					Stest window = new Stest();
+					window.frame.setVisible(true);
+				} catch (Exception e) {
+					e.printStackTrace();
+				}
+			}
+		});
+	}
+
+	/**
+	 * Create the application.
+	 */
+	public Stest() {
+		initialize();
+	}
+
+	/**
+	 * Initialize the contents of the frame.
+	 */
+	private void initialize() {
+		frame = new JFrame();
+		frame.setBounds(100, 100, 450, 300);
+		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+	}
+
+}

exp7/qq.java

@@ -0,0 +1,86 @@
+package exp7;
+
+import java.awt.EventQueue;
+
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+import javax.swing.border.EmptyBorder;
+import java.awt.GridBagLayout;
+import javax.swing.JLabel;
+import java.awt.GridBagConstraints;
+import java.awt.Insets;
+import javax.swing.JTextField;
+
+public class qq extends JFrame {
+
+	private static final long serialVersionUID = 1L;
+	private JPanel contentPane;
+	private JTextField textField;
+	private JTextField textField_1;
+
+	/**
+	 * Launch the application.
+	 */
+	public static void main(String[] args) {
+		EventQueue.invokeLater(new Runnable() {
+			public void run() {
+				try {
+					qq frame = new qq();
+					frame.setVisible(true);
+				} catch (Exception e) {
+					e.printStackTrace();
+				}
+			}
+		});
+	}
+
+	/**
+	 * Create the frame.
+	 */
+	public qq() {
+		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		setBounds(100, 100, 450, 300);
+		contentPane = new JPanel();
+		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
+
+		setContentPane(contentPane);
+		GridBagLayout gbl_contentPane = new GridBagLayout();
+		gbl_contentPane.columnWidths = new int[]{0, 0, 0, 0, 0};
+		gbl_contentPane.rowHeights = new int[]{0, 0, 0, 0, 0};
+		gbl_contentPane.columnWeights = new double[]{0.0, 0.0, 0.0, 1.0, Double.MIN_VALUE};
+		gbl_contentPane.rowWeights = new double[]{0.0, 0.0, 0.0, 0.0, Double.MIN_VALUE};
+		contentPane.setLayout(gbl_contentPane);
+		
+		JLabel lblNewLabel = new JLabel("账号");
+		GridBagConstraints gbc_lblNewLabel = new GridBagConstraints();
+		gbc_lblNewLabel.insets = new Insets(0, 0, 5, 5);
+		gbc_lblNewLabel.gridx = 1;
+		gbc_lblNewLabel.gridy = 1;
+		contentPane.add(lblNewLabel, gbc_lblNewLabel);
+		
+		textField = new JTextField();
+		GridBagConstraints gbc_textField = new GridBagConstraints();
+		gbc_textField.insets = new Insets(0, 0, 5, 0);
+		gbc_textField.fill = GridBagConstraints.HORIZONTAL;
+		gbc_textField.gridx = 3;
+		gbc_textField.gridy = 1;
+		contentPane.add(textField, gbc_textField);
+		textField.setColumns(10);
+		
+		JLabel lblNewLabel_1 = new JLabel("密码");
+		GridBagConstraints gbc_lblNewLabel_1 = new GridBagConstraints();
+		gbc_lblNewLabel_1.insets = new Insets(0, 0, 0, 5);
+		gbc_lblNewLabel_1.gridx = 1;
+		gbc_lblNewLabel_1.gridy = 3;
+		contentPane.add(lblNewLabel_1, gbc_lblNewLabel_1);
+		
+		textField_1 = new JTextField();
+		GridBagConstraints gbc_textField_1 = new GridBagConstraints();
+		gbc_textField_1.fill = GridBagConstraints.HORIZONTAL;
+		gbc_textField_1.gridx = 3;
+		gbc_textField_1.gridy = 3;
+		contentPane.add(textField_1, gbc_textField_1);
+		textField_1.setColumns(10);
+	}
+
+}

exp8/CollectionSort.java

@@ -0,0 +1,36 @@
+package exp8;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Scanner;
+
+public class CollectionSort {
+    public static void main(String[] args) {
+
+        //获取以','分割数字的字符串, 以"-1"结束
+        Scanner scan = new Scanner(System.in);
+        System.out.println("输入以','分割的数字, 以\"-1\"结束");
+        String str = scan.nextLine(); 
+        scan.close();
+
+        //分割字符串
+        String[] sNums = str.split(",");
+
+        //将字符串数组转为整形数组
+        ArrayList<Integer> nums = new ArrayList<>();
+        for (String s : sNums) {
+            if(s.equals("-1"))
+                break;
+            else
+                nums.add(Integer.parseInt(s));
+        }
+
+        //对整形数组进行排序
+        Collections.sort(nums);
+
+        //输出整形数组
+        System.out.println("\n排序后的数组:");
+        for (Integer num : nums) {
+            System.out.print(num+" ");
+        }
+    }
+}

exp8/MyList.java

@@ -0,0 +1,46 @@
+package exp8;
+
+import java.util.LinkedList;
+
+public class MyList<E> {
+    private LinkedList<E> list;
+    public MyList(){
+        list = new LinkedList<>();
+    }
+
+    public void show(){
+        System.out.print("[");
+        for(E e :list){
+            System.out.print(e+",");
+        }
+        System.out.println("\b]\n");
+    }
+    
+    public void push(E elem){
+        list.add(elem);
+        System.out.println("Push(" + elem +")");
+        show();
+    }
+
+    public E pop(){
+        E elem = list.removeLast();
+        System.out.println("Pop(" + elem +")");
+        show();
+        return elem;
+    }
+
+
+    public static void main(String[] args) {
+        MyList<Integer> list = new MyList<>();
+
+        list.push(1);
+        list.push(2);
+        list.push(3);
+
+        list.pop();
+
+        list.push(4);
+    }
+}
+
+

exp8/Student.java

@@ -0,0 +1,15 @@
+package exp8;
+
+class Student{
+    String name;
+    String calssName;
+
+    public Student(String name, String className){
+        this.name = name;
+        this.calssName = className;
+    }
+
+    public void show(){
+        System.out.println(this.name+","+this.calssName);
+    }
+}

exp8/StudentsList.java

@@ -0,0 +1,31 @@
+package exp8;
+
+import java.util.ArrayList;
+
+public class StudentsList {
+    public static void main(String[] args) {
+        ArrayList<Student> students = new ArrayList<Student>();
+    
+        // 外包1班的学生  
+        students.add(new Student("张三", "外包1班"));  
+        students.add(new Student("李四", "外包1班"));  
+        students.add(new Student("王五", "外包1班"));  
+        students.add(new Student("赵六", "外包1班"));  
+        students.add(new Student("孙七", "外包1班"));  
+
+        // 计算机应用1班的学生  
+        students.add(new Student("周八", "计算机应用1班"));  
+        students.add(new Student("吴九", "计算机应用1班"));  
+        students.add(new Student("郑十", "计算机应用1班"));  
+
+        // 计算机应用2班的学生  
+        students.add(new Student("陈十一", "计算机应用2班"));  
+        students.add(new Student("蒋十二", "计算机应用2班"));  
+        students.add(new Student("沈十三", "计算机应用2班"));  
+        students.add(new Student("韩十四", "计算机应用2班"));
+
+        for(Student s: students){
+            s.show();
+        }
+    }
+}

exp8/TreeSetDemo.java

@@ -0,0 +1,24 @@
+package exp8;
+
+import java.util.Comparator;
+import java.util.TreeSet;
+
+class Roomate{
+    String name;
+    int age;
+
+    Roomate(String name, int age){
+        this.name = name;
+        this.age = age;
+    }
+}
+
+public class TreeSetDemo {
+    TreeSet<Roomate> rs = new TreeSet<>(new Comparator<Roomate>() {
+        @Override
+        public int compare(Roomate r1, Roomate r2){
+            return Integer.compare(r1.age, r2.age);
+        }
+    });
+
+}

exp9/EceptionExample1.java

@@ -0,0 +1,16 @@
+package exp9;
+
+import java.io.*;
+public class EceptionExample1
+{
+	public static void main(String args[])  throws IOException
+	{
+		int c;
+		//try{
+		while((c=System.in.read())!=-1)
+			System.out.println(c);
+		//}
+		//catch(IOException e)
+		//{ }
+	}
+}

exp9/ExceptionDemo.java

@@ -0,0 +1,70 @@
+// 当出现继承关系时，异常处理中要注意下面三中情况：
+// * A:子类重写父类方法时，子类的方法必须抛出相同的异常或父类异常的子类。
+// * B:如果父类抛出了多个异常,子类重写父类时，只能抛出相同的异常或者是他的子集，子类不能抛出父类没有的异常
+// * C:如果被重写的方法没有异常抛出，那么子类的方法绝对不可以抛出异常，如果子类方法内有异常发生，那么子类只能try，不能throws。
+// 请在下面代码的基础上，通过增加、修改代码对上面三种情况进行测试。
+
+package exp9;
+
+import java.io.FileReader;
+import java.io.IOException;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+public class ExceptionDemo {
+    public static void main(String[] args) {
+        Fu o = new Zi();
+        try{
+            o.show();
+            o.method2();
+            o.method();
+        }catch(Exception e){
+        }
+    }
+    
+}
+
+class Fu {
+	public void show() throws Exception {
+	}
+
+	public void method() {
+	}
+
+    public void method2() throws Exception{
+    }
+}
+
+
+class Zi extends Fu {
+	@Override
+//	public void show() throws Exception{
+    // [* A]
+	public void show() throws ArithmeticException {
+        System.out.println(1/0);
+	}
+
+    @Override
+    //[* B]
+    public void method2() throws IOException, ArrayIndexOutOfBoundsException/*, RuntimeException*/{
+        new FileReader("NotExistFile").close();
+        int[] arr = new int[3];
+        System.out.println(arr[5]);
+    }
+
+	//测试throws和try方法
+    // [* C]
+	@Override
+	public void method()/*throws ParseException*/{
+        try{
+            String s = "2014-11-20";
+            SimpleDateFormat sdf = new SimpleDateFormat();
+            Date d = sdf.parse(s);
+            System.out.println(d);
+        }catch(ParseException e){
+            System.out.println("解析日期格式失败!");
+        }
+		
+	}
+}

exp9/ExceptionExample3.java

@@ -0,0 +1,21 @@
+package exp9;
+
+class myexcep extends Exception
+{
+	//myexcep()
+	//{System.out.println("Excep occured");}
+}
+public class ExceptionExample3
+{
+	static void f1() throws myexcep
+	{ throw new myexcep(); }
+	public static void main(String args[])
+	{
+		try
+		{  f1();  }
+		catch(myexcep e1)
+		{System.out.println("Exception 1");}
+        finally   //可要可不要的finally部分
+{System.out.println("this part can remain or not!"); }
+	}
+}

exp9/ExceptionExample4.java

@@ -0,0 +1,39 @@
+package exp9;
+
+class ArgumentOutOfBoundsException extends Exception // 自定义一种异常
+{
+  ArgumentOutOfBoundsException() {
+    System.out.println("输入错误！欲判断的数不能为负数！");
+  }
+}
+
+public class ExceptionExample4 {
+  public static boolean prime(int m) throws ArgumentOutOfBoundsException {
+    if (m < 0) {
+      ArgumentOutOfBoundsException ae = new ArgumentOutOfBoundsException();
+      throw ae;
+    } else {
+      boolean isPrime = true;
+      for (int i = 2; i < m; i++)
+        if (m % i == 0) {
+          isPrime = false;
+          break;
+        }
+      return isPrime;
+    }
+  }
+
+  public static void main(String args[]) {
+    if (args.length != 1) {
+      System.out.println("输入格式错误！请按照此格式输入：java Usedefine Exception m");
+      System.exit(0);
+    }
+    int m = Integer.parseInt(args[0]); // 读入这个整数
+    try {
+      boolean result = prime(m); // 调用方法判断是否为素数
+      System.out.println("对您输入的整数" + m + "是否为素数的判断结果为：" + result);
+    } catch (ArgumentOutOfBoundsException e) {
+      System.out.println("异常名称：" + e.toString());
+    }
+  }
+}

exp9/ExceptionExmaple2.java

@@ -0,0 +1,17 @@
+package exp9;
+
+import java.io.*;
+public class ExceptionExmaple2
+{
+   public static void main(String args[]) throws NumberFormatException
+   {
+System.out.println("Please Input an Interger:");
+try{    //此处可能会抛出I/O异常
+    BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
+    int a=Integer.parseInt(in.readLine()); //此处可能会抛出数据格式异常
+    System.out.println("the Integer you input is:"+a);
+   }
+catch(IOException e)          //捕获I/O异常并处理
+  {   System.out.println("I/O error");  }
+   }
+}

exp9/ExceptionTest.java

@@ -0,0 +1,27 @@
+package exp9;
+
+import java.util.Scanner;
+
+public class ExceptionTest {
+    public static void main(String[] args) {
+        int[] nums = new int[5];
+        int size=0;
+        Scanner scan = new Scanner(System.in);
+
+        while (true) {
+            try {
+                String str = scan.nextLine();
+                nums[size] = Integer.parseInt(str);
+                size++;
+            } catch (NumberFormatException e) {
+                System.out.println("不接受非整数字符!");
+            } catch (ArrayIndexOutOfBoundsException e){
+                System.out.println("数组已满!");
+                break;
+            }
+        }
+
+        scan.close();
+    }
+    
+}

exp9/FinallyDemo2.java

@@ -0,0 +1,29 @@
+// 如下所示代码中，如果catch里面有return语句，请问finally的代码还会执行吗?
+// 如果会，请问是在return前还是return后。请使用debug方法查看程序中的变量a的取值是多少。
+// 如果将最后一名return a;语句移到finally中，那么又会是什么情况。
+
+package exp9;
+
+public class FinallyDemo2 {
+	public static void main(String[] args) {
+		System.out.println(getInt());
+	}
+	public static int getInt() {
+		int a = 10;
+		try {
+			System.out.println("try");
+			System.out.println(a / 0);
+			a = 20;
+		} catch (ArithmeticException e) {
+			System.out.println("catch");
+			a = 30;
+			return a;
+			
+		} finally {
+			System.out.println("finial");
+			a = 40;
+			//return a; 
+		}
+		return a;
+	}
+}

test/PolymorphismTest.java

@@ -0,0 +1,30 @@
+package test;
+
+public class PolymorphismTest {	
+	public static void main(String[] args) {
+		Student[] studentArray = new Student[5];
+		studentArray[0] = new Undergraduate("陈建平"); 	 //本科生陈建平
+		studentArray[1] = new Undergraduate("鲁向东");  //本科生鲁向东
+		studentArray[2] = new Postgraduate("匡晓华"); 	//研究生匡晓华
+		studentArray[3] = new Undergraduate("周丽娜");	//本科生周丽娜
+		studentArray[4] = new Postgraduate("梁欣欣");	//研究生梁欣欣
+		 
+		 for (int i=0; i<studentArray.length;i++) {
+			 studentArray[i].setCourseScore(0,87);
+			 studentArray[i].setCourseScore(1,90);
+			 studentArray[i].setCourseScore(2,78);
+		 }
+	     for (int i=0; i<5 ;i++) {
+	    	 studentArray[i].calculateGrade();
+		 }
+	     System.out.println("姓名" + "     类型" +"    成绩");
+		 System.out.println("-----------------------");
+
+		 for (int i=0; i<5 ;i++) {		   
+	       System.out.println(studentArray[i].getName( )+"   "+
+	    		   studentArray[i].getType( )+"  "+
+	    		   studentArray[i].getCourseGrade( ));
+		 }
+	  }
+}    
+

test/Postgraduate .java

@@ -0,0 +1,34 @@
+package test;
+
+class Postgraduate extends Student {  
+    public Postgraduate(String name)
+    {
+       super(name,"研究生");	 
+    }   
+    public void calculateGrade()
+    {
+        int total = 0;
+        double average = 0;
+        for (int i = 0; i < CourseNo; i++) {
+            total =total + getCourseScore(i);
+        };
+        average = total / CourseNo;
+        String currentGrade="";
+        if (average>=90){ 
+            currentGrade = "优秀";
+        }
+        else if (average>=80&&average<90) {
+            currentGrade = "良好";
+        }
+        else if (average>=70&&average<80) {
+            currentGrade = "一般";
+        }
+        else if (average>=60&&average<70) {
+            currentGrade = "及格";
+        }
+        else{
+            currentGrade = "不及格";
+        }	
+        setCourseGrade(currentGrade);
+     }
+ }

test/ShapeDemo.java

@@ -0,0 +1,74 @@
+package test;
+
+abstract class Shapes  {
+    public  int x,y; //x，y为的坐标  
+    public  int width,height;   
+    public  Shapes(int x,int y,int width,int height)  {    
+        this.x = x;
+        this.y = y;
+        this.width = width;
+        this.height = height;
+    }   
+    public abstract double getArea();  
+    public abstract double getPerimeter(); 
+    public abstract void show();
+    }
+
+    class Rectangle extends Shapes{
+        double a;
+        double b;
+
+        Rectangle(double a, double b){
+            super(0, 0, 0, 0);
+            this.a=a;
+            this.b=b;
+        }
+
+        public double getArea(){
+            return a*b;
+        }
+
+        public double getPerimeter(){
+            return (a+b)*2;
+        }
+
+        public void show(){
+            System.out.println("矩形  长:"+this.a+"宽:"+this.b);
+        }
+    }
+
+    class Circle extends Shapes{
+        double radius;//半径
+        
+        Circle(double radius){
+            super(0, 0, 0, 0);
+            this.radius=radius;
+        }
+        
+        public double getArea(){
+            return 3.14159265324*radius*radius;
+        }
+
+        public double getPerimeter(){
+            return 3.14159265324*radius*2;
+        }
+
+        public void show(){
+            System.out.println("圆  半径:"+this.radius);
+        }
+    }
+
+
+public class ShapeDemo {
+    public static void main(String[] args){
+        Shapes r = new Rectangle(2, 3);
+        Shapes c = new Circle(5);
+
+        r.show();
+        System.out.println("面积:"+r.getArea()+"  周长:"+r.getPerimeter()+"\n");
+
+        c.show();
+        System.out.println("面积:"+c.getArea()+"  周长:"+c.getPerimeter()+"\n");
+         
+    }
+}

test/Student.java

@@ -0,0 +1,56 @@
+package test;
+
+public abstract class Student {
+    final static int CourseNo = 3;  
+    private String name;
+	  private String type;
+    private int[]  courses;    
+    private String  courseGrade;  
+    public Student(){
+    	
+    }
+    public Student(String name,String type)
+    {
+        this.name = name;
+        this.type = type;
+        courses = new int[3];
+        courseGrade=""; 
+    }    
+    public abstract void calculateGrade();     
+	  public String getName( )
+    {
+      	return name;
+    }
+	  public String getType( )
+    {
+         return type; //返回学生类型
+    }
+	  public String getCourseGrade( )
+    {
+      return courseGrade;
+    }
+   
+    public int getCourseScore(int courseNumber)
+    {
+      return courses[courseNumber];
+    }    
+    
+    public void setName(String name)
+    {
+      this.name = name;
+    }
+
+	  public void setType(String type)
+    {
+      this.type = type;
+    }
+  
+    public void setCourseScore(int courseNumber, int courseScore)
+    {
+        courses[courseNumber] = courseScore;//按课程索引号设置课程成绩
+    }
+	public void setCourseGrade(String courseGrade) {
+		this.courseGrade = courseGrade;
+	}
+}
+

test/Undergraduate.java

@@ -0,0 +1,33 @@
+package test;
+
+class Undergraduate extends Student {   
+    public Undergraduate(String name) 
+	{
+        super(name,"本科生");		
+    }
+    public void calculateGrade() {
+      int total = 0;
+	  double average = 0;
+      for (int i = 0; i < CourseNo; i++) {
+         total=total+getCourseScore(i); // 累加各门课程成绩
+      };
+      average = total / CourseNo;
+      String currentGrade="";
+      if (average>=80&&average<100){ 
+    	  currentGrade = "优秀";
+      }
+	  else if (average>=70&&average<80){ 
+		  currentGrade = "良好";
+	  }
+	   else if (average>=60&&average<70){ 
+		   currentGrade = "一般";
+	   }
+	   else if (average>=50&&average<60){
+		   currentGrade = "及格";
+	   }	   
+	   else{
+		   currentGrade = "不及格";
+	   }	  
+      setCourseGrade(currentGrade);
+    }
+}