import java.util.Scanner;/*** 登录小案例*/
public class Demo2 {public static void main(String[] args) {String username = "abc";String passworld = "123";Scanner scanner = new Scanner(System.in);for (int i = 0; i < 3; i++) {System.out.println("请输入账号:");String logUsername = scanner.next();System.out.println("请输入密码:");String logPassworld = scanner.next();if (username.equals(logUsername) && passworld.equals(logPassworld)) {System.out.println("恭喜你登录成功");break;} else {if (i == 2) {System.out.println("账号或密码错误，账户已被锁定,谢谢！");} else {System.out.println("账号或密码错误,还有" + (2 - i) + "次机会");}}}}
}