java怎么获取登陆的用户名 java怎么获取用户的输入

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如何从键盘获取不同类型的变量：需要使用Scanner类

1.导包：import java.util.Scanner;

2.Scanner的实例化：Scanner scan = new Scanner(System.in);

3.调用Scanner类的相关方法（next（）/nextXxx（）），来获取指定类型的变量。

import java.util.Scanner;
class ScannerText{
public static void main(String[] args){

Scanner scan = new Scanner(System.in);

System.out.println("please input your name:");
String name = scan.next();
System.out.println(name);

System.out.println("please input your age:");
int age = scan.nextInt();
System.out.println(age);

System.out.println("please input your weight:");
double weight = scan.nextDouble();
System.out.println(weight);

System.out.println("dou u love me?");
boolean isLove = scan.nextBoolean();
System.out.println(isLove);

System.out.println("please input your sex:");
String gender = scan.next();
char genderChar = gender.charAt(0);
System.out.println(genderChar);

}}

 

時は金なり 时间就是金钱！