throwdemo.java

JAVA编程思想源代码 值得一下 很难找的

package chapter14;

public class ThrowDemo {

	public static void main(String[] args) {

		int num;
		char ch;
		try {
			for (int i = 0; i < args[0].length(); i++) {
				ch = args[0].charAt(i);
				if (!Character.isDigit(ch)) { // 判断参数中的字符是否为数字
					throw new NumberFormatException(); // 抛出异常
				}
			}
			num = Integer.parseInt(args[0]);
			if (num >= 60) {
				System.out.println(num + " 是及格的成绩");
			} else {
				System.out.println(num + " 是不及格的成绩");
			}
		} catch (ArrayIndexOutOfBoundsException e) {
			System.out.println("没有输入参数");
		} catch (NumberFormatException e) {
			System.out.println("输入的参数不是数值类型");
		}

	}

}