java中如何从键盘中输入数值

import java.util.Scanner; //调用java.util.Scanner

public class Test
{
    public static void main (String[] args)
    {
        Scanner keyboardInput = new Scanner(System.in); //从类Scanner中创建object keyboradInput

        if (keyboardInput.hasNextInt() == true) //新创建的keyboardInput这个object下,调用hasNextInt() method来判断输入的是不是整数
            System.out.println("输入的整数是: " + keyboardInput.nextInt()); //如果是整数,输出这个整数
        else
            System.out.println("输入的不是整数");
    }
}
原文地址:https://www.cnblogs.com/profesor/p/12924797.html