Scanner hasNextInt

原文链接： http://www.cnblogs.com/hellsino/p/11151303.html

import java.util.Scanner;

public class TestScanner {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int num;
        while (true) {
            System.out.println("输入整型数字:");
            if (in.hasNextInt()) {
                num = in.nextInt();
                break;
            } else {
                System.out.println("输入有误！");
                in.next();
            }
        }
    }
}

转载于:https://www.cnblogs.com/hellsino/p/11151303.html