Java JLabel不显示

Question

JLabel isn't showing up! The buttons() are only showing when i click in my frame . Is it possible to show it without clicking?

public frame() {
    frame.setTitle("MyWindowTitle");
    frame.setSize(width, height);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    frame.setResizable(true);
    // frame.setLayout(new FlowLayout());
    frame.setLayout(null);
    frame.getContentPane().setBackground(Color.RED);
    frame.pack();
    frame.setVisible(true);
    JPanel panel = new JPanel();
    frame.add(panel);
    panel.setLocation(150, 150);
    panel.add(new JButton("Hello!"));
    scorel = new JLabel("Score: " + score);
    frame.add(scorel);

    buttons();
}

Answer 1

Make

 //frame.pack(); //Dont call pack() if you use null layout
 frame.setVisible(true);

is the last statement of your method. And also use setSize() of panel as you use null layout in frame . Without setSize and setLocation or together setBounds , your content does not properly show in null layout .

panel.setSize(400, 300);

also

scorel.setSize(width, height);
scorel.setLocation(x, y);

Good Practice

1. Try to avoid null layout

   To learn about layout please see https://docs.oracle.com/javase/tutorial/uiswing/layout/visual.html

2. Fix your variable and class name style. Learn naming conventions http://www.oracle.com/technetwork/java/codeconventions-135099.html