Question

JAVA中如何实现从键盘中输入一个整数?

Answer 1

首先需要用到Scanner 类，所以要在最开始import java.util.Scanner;
然后在需要用到的方法里面创建个Scanner 物体，Scanner sc = new Scanner(System.in);
然后就可以用Scanner的方法nextInt()了： sc.nextInt();
举例如下：
import java.util.Scanner; //import the Scanner class
public class sampleInput{
public static void main(String[] args){
Scanner sc = new Scanner(System.in); //create the new Scanner object sc
System.out.println("please input an integer");
int a = sc.nextInt(); //use the nextInt() method to read in
System.out.println("Thanks for your help!" + a); //print the input integer
}
}

Answer 2

import java.util.*
public class test{
public static void main(String[] args){
Scanner input = new Scanner(System.in);
System.out.println("请输入一个整数： ");
int num = input.nextInt();
System.out.println("你输入的整数是："+num);
}
}