W3School TIY Editor

import java.util.Scanner; // 导入 Scanner 类 class Main { public static void main(String[] args) { Scanner myObj = new Scanner(System.in); String userName; // 输入用户名并按下回车 System.out.println("请输入用户名"); userName = myObj.nextLine(); System.out.println("用户名为: " + userName); } }