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POBufferedStrategy in JPanel?
 

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    <p>I am trying to convert a game using Canvasto using JFrame/JPanel.. Previously I had Game object Extend Canvas and implement Runnable</p> <p>and then created a JFrame and passed it the canvas...</p> <p>What it was before: (works)</p> <pre><code> public class Game extends Canvas implements Runnable{ private void render() { // TODO Auto-generated method stub BufferStrategy bs = this.getBufferStrategy(); if(bs==null){ createBufferStrategy(3); return; } Graphics g = bs.getDrawGraphics(); ////////////////////////////// g.drawImage(image, 0, 0, getWidth(), getHeight(), this); g.drawImage(background,0,0,null); p.render(g); c.render(g); //g.drawImage(player,100,100,this); ////////////////////////////// g.dispose(); bs.show(); } public static void main (String args[]){ Game game = new Game(); game.setPreferredSize(new Dimension(WIDTH*SCALE, HEIGHT*SCALE)); game.setMaximumSize(new Dimension(WIDTH*SCALE, HEIGHT*SCALE)); game.setMinimumSize(new Dimension(WIDTH*SCALE, HEIGHT*SCALE)); JFrame frame = new JFrame(game.TITLE); frame.add(game); frame.pack(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setResizable(false); frame.setLocationRelativeTo(null); frame.setVisible(true); game.start(); } } </code></pre> <p>But I would like to instead do the graphics on a JPanel, instead of Canvas, and pass this to the JFrame.. but it doesn't work..</p> <pre><code> public class Game extends JPanel implements Runnable{ private void render() { // TODO Auto-generated method stub BufferStrategy bs = this.getBufferStrategy(); // error here if(bs==null){ createBufferStrategy(3); //error here return; } public static void main (String[] args){ Game game = new Game(); game.setPreferredSize(new Dimension(WIDTH*SCALE, HEIGHT*SCALE)); game.setMaximumSize(new Dimension(WIDTH*SCALE, HEIGHT*SCALE)); game.setMinimumSize(new Dimension(WIDTH*SCALE, HEIGHT*SCALE)); JFrame frame = new JFrame(game.TITLE); frame.add(game); frame.pack(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setResizable(false); frame.setLocationRelativeTo(null); frame.setVisible(true); game.start(); } } Exception in thread "Thread-1" java.lang.IllegalArgumentException: input == null! at javax.imageio.ImageIO.read(Unknown Source) </code></pre> <p>Confused...</p>
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    1. CO1) For better help sooner, post an [SSCCE](http://sscce.org/). 2) Use a consistent and logical indent for code blocks. The indentation of the code is intended to help people understand the program flow.
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      1. USAndrew Thompson
 

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