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