guess.java

Java程序设计大学教程程序源代码

/*
 * OutOfRangeExceptionDemo.java
 *
 * Created on 2005年7月25日, 上午10:45
 *
 * @author Liu Yi  ( http://www.liu-yi.net )
 */

package jbookch9;

import java.io.*;
public class Guess {
    public void check(int input)  throws OutOfRangeException {
        if (input < MIN) throw new OutOfRangeException("偏小");
        if (input > MAX) throw new OutOfRangeException("偏大");
    }

    public static void main(String[] args) throws IOException {
        //初始化
       Guess guess=new Guess();
        BufferedReader input = new BufferedReader
                (new InputStreamReader(System.in));
        boolean loop=true;
        int theInteger=0;
        //循环猜数
        while(loop) {
            System.out.println("请输入你猜的整数:");
            theInteger = Integer.parseInt(input.readLine());
            try{
                guess.check(theInteger);
                loop=false;
            } catch (OutOfRangeException ex) {
                System.out.println("你猜的整数"+ex.getMessage());
            }
        }
        System.out.println("你猜对了！");
    }
    private static final int MAX=20,MIN=10;
}