JavaFX登录访问被拒绝

Question

当我尝试使用redbull作为用户名和pass123作为密码登录时，它不显示已授予访问权限的消息，而是转到else语句并显示访问被拒绝的消息

    Label usernameLb = new Label("Username:");

    GridPane.setConstraints(usernameLb, 0, 0);

    TextField usernameTf = new TextField();

    usernameTf.setPromptText("Username");

    GridPane.setConstraints(usernameTf , 1, 0);

    Label passLb = new Label("Password:");

    GridPane.setConstraints(passLb, 0, 1);

    TextField passTf = new TextField();

    passTf.setPromptText("Password");

    GridPane.setConstraints(passTf, 1, 1);

    Button loginBtn = new Button("Login");

    loginBtn.setOnAction(e -> {

        String username = usernameTf.getText();

        String password = passTf.getText();

        if (username == "redbull" && password == "pass123"){

            System.out.println(username + "\n" + password);

            JOptionPane.showMessageDialog(null, 

                    "Access Granted", " ", JOptionPane.PLAIN_MESSAGE);

        } else {

            System.out.println(username + "\n" + password);

            JOptionPane.showMessageDialog(null, 

                    "Access Denied", " ", JOptionPane.PLAIN_MESSAGE);

        }

    });

    GridPane.setConstraints(loginBtn, 1, 2);

    gridPane.getChildren().addAll(usernameLb, 

    usernameTf, passLb, passTf, loginBtn);

    Scene scene1 = new Scene(gridPane, 300, 200);

    window.setScene(scene1);

    window.show();

}

Answer 1

.equals()比较两个字符串的值时使用。(username.equals("redbull") && password.equals("pass123"))