suanfa.java

是一个自定义异常的文件

package com.wj;

import java.util.Scanner;

public class Suanfa {
	int first;
	int second;

	public void suan() throws DBException {
		java.util.Scanner ner = new Scanner(System.in);
		System.out.println("请输入两个数---->");
		first = ner.nextInt();
		second = ner.nextInt();
		try {
			int result = first / second;
			System.out.println(result);
		} catch (Exception e) {
			throw new DBException("除数不能为0");
		}
	}

	public static void main(String[] args) {
		try {
			new Suanfa().suan();
		} catch (DBException e) {
			System.out.println(e.getMessage());
		}
	}

}