UPDATE

上级 50a91f1d
import java.util.Scanner; //导入Scanner模块
public class TestScanner {
public class main {
public static void main(String[] ages){
Scanner s=new Scanner(System.in); //创建Scanner,System.in 是获得输入,System.out是获得输出
System.out.println("请输入用户名:");
......
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