java异常问题求解

下面代码运行出来输入5和0.5出现错误求：用

try{

}catch(){

}finally{

}来解决答案

package edu.sdp.java.textbook;

import java.util.Scanner;

public class CalculatorTest {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		System.out.println("请输入第一个操作数（整数）");
		int oper1 = scan.nextInt();
		System.out.println("请输入第二个操作数（整数）");
		int oper2 = scan.nextInt();
		System.out.println("------四则运算结果-------");
		System.out.println(oper1+"+"+oper2+"="+Calculator.add(oper1, oper2));
		System.out.println(oper1+"-"+oper2+"="+Calculator.subract(oper1, oper2));
		System.out.println(oper1+"*"+oper2+"="+Calculator.multiply(oper1, oper2));
		System.out.println(oper1+"/"+oper2+"="+Calculator.divide(oper1, oper2));
	}

}









package edu.sdp.java.textbook;

import java.util.Scanner;

public class CalculatorTest2 {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		try{
		System.out.println("请输入第一个操作数（整数）");
		int oper1 = scan.nextInt();
		System.out.println("请输入第二个操作数（整数）");
		int oper2 = scan.nextInt();
		System.out.println("------四则运算结果-------");
		System.out.println(oper1+"+"+oper2+"="+Calculator.add(oper1, oper2));
		System.out.println(oper1+"-"+oper2+"="+Calculator.subract(oper1, oper2));
		System.out.println(oper1+"*"+oper2+"="+Calculator.multiply(oper1, oper2));
		System.out.println(oper1+"/"+oper2+"="+Calculator.divide(oper1, oper2));
		}catch(ArithmeticException ex){
			System.out.println("除数不能为0，请重新输入");
		}finally{
			scan.close();
		}
	}

}

错误问题

Scanner scan = new Scanner(System.in);
        try {
            System.out.println("请输入第一个操作数（整数）");
            int oper1 = scan.nextInt();
            System.out.println("请输入第二个操作数（整数）");
            int oper2 = scan.nextInt();
            System.out.println("------四则运算结果-------");
            System.out.println(oper1+"+"+oper2+"="+Calculator.add(oper1, oper2));
		    System.out.println(oper1+"-"+oper2+"="+Calculator.subract(oper1, oper2));
		    System.out.println(oper1+"*"+oper2+"="+Calculator.multiply(oper1, oper2));
		    System.out.println(oper1+"/"+oper2+"="+Calculator.divide(oper1, oper2));
        } catch (ArithmeticException ex) {
            System.out.println("除数不能为0，请重新输入");
        } catch (InputMismatchException ex2){//多加一个异常类型处理，跟处理分母不能为0一样
            System.out.println("输入的不是整数，请重新输入");
        }finally{
            scan.close();
        }

这样子就可以处理那个报错了，记得采纳哦

 public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        try {
            System.out.println("请输入第一个操作数（整数）");
            int oper1 = scan.nextInt();
            System.out.println("请输入第二个操作数（整数）");
            int oper2 = scan.nextInt();
            System.out.println("------四则运算结果-------");
            System.out.println(oper1+"+"+oper2+"="+Calculator.add(oper1, oper2));
		    System.out.println(oper1+"-"+oper2+"="+Calculator.subract(oper1, oper2));
		    System.out.println(oper1+"*"+oper2+"="+Calculator.multiply(oper1, oper2));
		    System.out.println(oper1+"/"+oper2+"="+Calculator.divide(oper1, oper2));
        } catch (ArithmeticException ex) {
            System.out.println("除数不能为0，请重新输入");
        } catch (InputMismatchException ex2){//把异常类型加上就好了。跟处理分母不能为0一样
            System.out.println("输入的不是整数，请重新输入");
        }finally{
            scan.close();
        }
    }

把异常类型加上就好了。跟处理分母不能为0一样

该问题是因为nextInt()只能输入整数，你输入0.5，数据类型转换错误啦

我的意思是用

try{

}catch(){

}finally{

}

的形式改正错误

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