接受键盘输入(Accept keyboard input)

接受键盘输入

Scanner类的使用

import简单介绍 

package mypro01;

/**

 * 测试Scanner类的使用,如何接收键盘的输入.

 * @author 神奇的梦

 *

 */ 

//java.lang包里面的内容我们可以直接用 

//这里Scanner的使用需要导入java.util包的名称

import java.util.Scanner;

public class TestScanner {   

    public static void test01(){

//      这样就形成了和键盘输入的交互

//      Scanner属于java.util包

//      调用构造器,传参System.in接收键盘的输入

//      System.out是输出控制台

        Scanner s =new Scanner(System.in);

//      输入你的字符串,返回你的字符串

        String str=s.next();//程序运行到next会阻塞,等待键盘的输入!

//      打印你的内容

        System.out.println(“刚才键盘输入:”+str);

    }   

    public static void test02(){

        Scanner s =new Scanner(System.in);

        System.out.println(“请输入一个加数:”);

        int a=s.nextInt();

        System.out.println(“请输入被加数:”);

        int b=s.nextInt();

        int sum=a+b;

        System.out.println(“两数相加和:”+sum);       

    } 

    public static void main(String[] args) { 

        test02();       

    }

————————

Accept keyboard input

Use of scanner class

Brief introduction to import

package mypro01;

/**

* test the use of scanner class and how to receive keyboard input

* @ author # magical dream

*

*/

//java. We can use the contents of Lang package directly

//Here, the use of scanner needs to import Java Name of util package

import java.util.Scanner;

public class TestScanner {   

    public static void test01(){

//This forms the interaction with keyboard input

//Scanner belongs to Java Util package

//Call the constructor and pass the parameter system In receives input from the keyboard

//      System. Out is the output console

        Scanner s =new Scanner(System.in);

//Enter your string and return your string

String str=s.next();// When the program runs to next, it will block and wait for the input of the keyboard!

//Print your content

System. out. Println (“keyboard input just now:” + STR);

}

    public static void test02(){

        Scanner s =new Scanner(System.in);

System. out. Println (“please enter an addend:”);

int a=s.nextInt();

System. out. Println (“please enter the addend:”);

int b=s.nextInt();

int sum=a+b;

System. out. Println (“sum of two numbers:” + sum);

}

    public static void main(String[] args) { 

test02();

}

}