1-如何接收用户键盘输入的数据

import java.util.Scanner;

Scanner s = new Scanner(System.in);

s.nextInt();

import java.util.Scanner;

Scanner  s = new Scanner(System.in);

s.nextInt();

引入一个类:(在类外)

import java.util.Scanner;

public class input{

public static void main(string[] args)

Scanner s=new Scanner(System.in);

int number1=s.nextInt();

System.out.println("number1");

}

import java.util.Scanner

Scanner s = new Scanner(System.in);

s.nextInt();// 输入整型

s.nextFloat();

s.nextdouble();

import java.util.Scanner

Scanner s=new Scanner(System.in);

int a=s.

接受用户数字：

要先Import java.util.Scanner这个类