.setLocation和.setBounds不适用于JLabel！ （和JButton）

Question

所以我已经看了很多关于这个的话题，但似乎没有解决我的问题！ 当我尝试在JLabel或JButton上使用setBounds（）或setLocation（）时，它只是不起作用！它似乎只是随机地放置它们。 这是我的代码：

public static void main(String[] args) {
    final JFrame frame = new JFrame(TITLE);
    final JLabel fpsLabel = new JLabel("FPS: ERROR");
    final JLabel fpsDone = new JLabel("FPS done: ERROR");
    final JPanel contentPanel = new JPanel();

    frame.setSize(WIDTH, HEIGHT);
            frame.setContentPane(contentPanel);
    frame.setLocationRelativeTo(null);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    fpsLabel.setLocation(WIDTH / 2, HEIGHT / 6);
    fpsDone.setLocation(200, HEIGHT / 6);
    frame.setJMenuBar(menubar);
    frame.setResizable(false);
    frame.add(fpsLabel);
    frame.add(fpsDone);
    frame.setVisible(true);
}

如果需要，我可以添加图片。

SSCCE：

public static void main(String[] args) {
            final JFrame frame = new JFrame("Example SSCCE");
            final JLabel fpsLabel = new JLabel("FPS: ERROR");
            final JLabel fpsDone = new JLabel("FPS done: ERROR");
            final JPanel contentPanel = new JPanel();
            final int HEIGHT = 400 / 16 * 9;

            frame.setSize(400, HEIGHT);
            frame.setContentPane(contentPanel);
            fpsDone.setLocation(200, HEIGHT / 2);
            fpsLabel.setLocation(200, HEIGHT / 2 + 50);
            contentPanel.add(fpsDone);
            contentPanel.add(fpsLabel);
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setVisible(true);
    }

我希望它看起来像什么（ASCII艺术？）：

__________________________________
|                                |
|                                |
|                                |
|                                |
|                                |
|           FPS: ERROR           |
|         FPS done: ERROR        |
|                                |
|                                |
|                                |
|                                |
|                                |
__________________________________

Answer 1

尝试调整此示例：

import java.awt.*;
import javax.swing.*;
import javax.swing.border.EmptyBorder;

public class SingleColumnFrame {

    public static void main(String[] args) {
        Runnable r = new Runnable() {

            @Override
            public void run() {
                // the GUI as seen by the user (without frame)
                // the values of '20' are for gaps between components
                JPanel gui = new JPanel(new GridLayout(0,1,20,20));
                // adjust numbers as required
                gui.setBorder(new EmptyBorder(40, 200, 40, 200));

                gui.add(new JLabel("FPS: ERROR",SwingConstants.CENTER));
                gui.add(new JLabel("FPS done: ERROR",SwingConstants.CENTER));

                JFrame f = new JFrame("Demo");
                f.add(gui);
                // Ensures JVM closes after frame(s) closed and
                // all non-daemon threads are finished
                f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                // See http://stackoverflow.com/a/7143398/418556 for demo.
                f.setLocationByPlatform(true);

                // ensures the frame is the minimum size it needs to be
                // in order display the components within it
                f.pack();
                f.setResizable(false);
                // should be done last, to avoid flickering, moving,
                // resizing artifacts.
                f.setVisible(true);
            }
        };
        // Swing GUIs should be created and updated on the EDT
        // http://docs.oracle.com/javase/tutorial/uiswing/concurrency/initial.html
        SwingUtilities.invokeLater(r);
    }
}