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); } }