import java.util.*;
public class HelloWorld {
public static void main(String[] args) {
Scanner scan =
new Scanner(System.
in);
System.
out.println(
"请输入用户名");
String username = scan.nextLine();
System.
out.println(
"请输入密码");
String password = scan.nextLine();
if(!username.equals(
"admin")) {
System.
out.println(
"用户名非法");
}
else if(!password.equals(
"123123")) {
System.
out.println(
"密码错误");
}
else {
System.
out.println(
"登录成功，恭喜你！！");
}
}
}
结果
注意
运行之前要引入java.util.*
