Java try.catch 自学笔记

package Exer10;

import java.util.Scanner;

public class Test10 {
    public static void main(String[] args) {
        int num;
        String string1;
        Scanner scanner = new Scanner(System.in);
        while (true){
            string1 = scanner.next();
            try {
                num = Integer.parseInt(string1);
                break;
            } catch (NumberFormatException e) {
                e.printStackTrace();
            }

        }
        System.out.println(num);
    }
}