我如何创建一个允许输入通用密码的登录屏幕，但在 3 个三分之后程序必须关闭（Java）

Question

Information needed 3 tries then program closes. The same password is used for every user.
The password is set too password = 12345678. User data is extracted from a GUI component

Code I've tried:

String password = "12345678";
    
String userInput = String.valueOf(jPasswordField1.getPassword()); 
int length = userInput.length(); 
if (userInput.equals(password)) { 
    this.dispose(); 
    new INPUT().setVisible(true); 
} 
else if (!userInput.equals(password)) { 
    if (length > 9) { 
        lblValid.setText("To many characters"); 
        tries++; 
    } 
    else if (length < 8) { 
        lblValid.setText("To little characters"); 
        tries++; 
    } 
} 
if (tries == 3) { 
    System.exit(0); 
}

Answer 1

You can use Scanner along with a while loop to achieve it:

    Scanner scanner = new Scanner(System.in);
    int tries=0;
    String password = "asdf123";//DO NOT USE THIS PASSWORD
    while(tries<3) {
        System.out.print("\nEnter password: ");
        String passwordattempt = scanner.nextLine();
        if(!passwordattempt.equals(password)) {
            System.out.println("Wrong password");
            tries++;
        }else {
            System.out.println("Correct");
            break;
        }
    }
    scanner.close();