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POJava Swing Application - buttons do not appear if resizable is set to false
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copied!<p>I have the following code. Class KochSnowflakesMenu is a grid JPanel with three buttons. Class KochSnowflakesDraw currently draws a circle using drawOval:</p> <pre><code>import javax.swing.*; import java.awt.*; public class KochSnowflakes { public static void main(String[] args) { JFrame frame = new JFrame("Koch Snowflakes"); frame.setVisible(true); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setBounds(0,0, 600, 425); frame.setBackground(Color.BLACK); frame.setResizable(false); frame.setLayout(null); // Create the button interface frame.add(new KochSnowflakesMenu()); frame.add(new KochSnowflakesDraw()); frame.repaint(); } } </code></pre> <p>This works if I comment out frame.setResizable(false). When I don't the buttons don't appear. Why is that? As you can see, I have tried using repaint(). I had previously the problem that the buttons would not show up until I manually resized the window... </p> <p>Also, as a bonus question, if anyone can tell me how to get the dimensions of a JPanel that would be great. The reason why I can't use a resizable layout manager such as BorderLayout, which really is what I want to use, is that I can't figure out the dimension of the JPanel that occupies the center (and hence have no idea how to large to draw the things I'm drawing).</p> <p>EDIT: As requested, here is the KockSnowflakesMenu class:</p> <pre><code>import javax.swing.*; import java.awt.*; public class KochSnowflakesMenu extends JPanel { public KochSnowflakesMenu() { setLayout(new GridLayout(3,1)); setBounds(0,0,200,400); JButton button_red = new JButton("Red"); JButton button_yellow = new JButton("Yellow"); JButton button_blue = new JButton("Blue"); add(button_red); add(button_yellow); add(button_blue); } } </code></pre> <p>And, just to be sure I didn't mess something up with KochSnowflakesDraw, here's that class as well:</p> <pre><code>import javax.swing.*; import java.awt.*; public class KochSnowflakesDraw extends JPanel { public KochSnowflakesDraw() { setLayout(null); setBounds(200, 0, 400, 400); } public void paintComponent(Graphics g) { g.setColor(Color.RED); g.drawOval(0,0,400, 400); } } </code></pre>

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