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copied!<blockquote> <p>What are the problems with settings bounds on non-resizable containers?</p> </blockquote> <p>Suppose you adjust the bounds to look good on your platform. Suppose the user's platform has a font with different, say larger, <code>FontMetrics</code>. This example is somewhat contrived, but you get the idea. If you change the bounds of a non-resizable container, be sure any text is visible regardless of the host platform's default font.</p> <p><img src="https://i.stack.imgur.com/fGcUG.png" alt="image"></p> <pre><code>import java.awt.BorderLayout; import java.awt.EventQueue; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.SwingUtilities; /** * @see http://stackoverflow.com/a/12532237/230513 */ public class Evil extends JPanel { private static final String s = "Tomorrow's winning lottery numbers: 42, "; private JLabel label = new JLabel(s + "3, 1, 4, 1, 5, 9", JLabel.LEFT); public Evil() { this.add(label); } private void display() { JFrame f = new JFrame("Evil"); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.add(this, BorderLayout.WEST); f.pack(); int w = SwingUtilities.computeStringWidth( label.getFontMetrics(label.getFont()), s); int h = f.getHeight(); f.setSize(w, h); f.setResizable(false); f.setLocationRelativeTo(null); f.setVisible(true); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { new Evil().display(); } }); } } </code></pre>

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