Java捕获异常后让用户重新输入

设置一个 error 遍历判断是否有异常产生并被捕获，每次进入遍历后设置 error 为 false，防止输入错误值后再输入正确值无法退出的情况产生

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class test {
    public static void main(String[] args) {
        BufferedReader keyboardIn = new BufferedReader(new InputStreamReader(System.in));
        boolean error = false;
        int user_answer = 0;
        do {
            error = false;
            try {
                user_answer = Integer.parseInt(keyboardIn.readLine());
            } catch (NumberFormatException | IOException e) {
                System.out.println("输入错误，请重新输入");
                error = true;
            }
        } while (error);
        System.out.println(user_answer);
    }
}