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POException in thread "main" java.lang.NullPointerException
 

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  1. POException in thread "main" java.lang.NullPointerException
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    <p>Hi im new here and to java so I am sure this will be a simple thing I overlooked, thanks for any help the code to my main class is here and the error code s at the bottom </p> <pre><code>package GameScreen; import java.awt.BorderLayout; import java.awt.Container; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import javax.swing.JFrame; public class GameScreen extends JFrame implements Runnable, KeyListener { private Thread animation = new Thread(this); private Container back = getContentPane(); private AniScreen aniscreen = new AniScreen(); public GameScreen() { super("moving image"); setBounds(20,20,1024,768); back.add (aniscreen, BorderLayout.CENTER); animation.start(); addKeyListener(this); setVisible (true); } /** * @param args the command line arguments */ public static void main(String[] args) { GameScreen gameScreen = new GameScreen(); } @Override public void run() { while (true) { aniscreen.repaint(); try { Thread.sleep(30); } catch(InterruptedException ex) { } } } @Override public void keyTyped(KeyEvent e) { } @Override public void keyPressed(KeyEvent e) { if (e.getKeyCode()==KeyEvent.VK_DOWN) { aniscreen.moveplayer(0,50); } if (e.getKeyCode()==KeyEvent.VK_UP) { aniscreen.moveplayer(0,-50); } } @Override public void keyReleased(KeyEvent e) { aniscreen.moveplayer(0,0); } } </code></pre> <p>This is the error code:</p> <pre><code> Exception in thread "main" java.lang.NullPointerException at javax.swing.ImageIcon.&lt;init&gt;(ImageIcon.java:205) at GameScreen.AniScreen.&lt;init&gt;(AniScreen.java:15) at GameScreen.GameScreen.&lt;init&gt;(GameScreen.java:15) at GameScreen.GameScreen.main(GameScreen.java:33) Java Result: 1 </code></pre> <p>This is the aniscreen class</p> <pre><code>package GameScreen; import java.awt.Graphics; import javax.swing.ImageIcon; import javax.swing.JComponent; public class AniScreen extends JComponent { private int x = 0; private int y = 0; private int xMovement; private int yMovement; private ImageIcon CINEMA = new ImageIcon (getClass().getResource ("CINEMA.jpg")); private ImageIcon survivor = new ImageIcon(getClass().getResource("survivor.jpg")); @Override public void paint (Graphics g) { x = x + xMovement; y = y + yMovement; g.drawImage(CINEMA.getImage(),x,y,100,100,null); g.drawImage(survivor.getImage(),x,y,100,100,null); } public void moveplayer (int xmov, int ymov) { xMovement = xmov; yMovement = ymov; } } </code></pre>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USJayyf9
    1. USJayyf9
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    1. VO
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      1. POException in thread "main" java.lang.NullPointerException
      1. This table or related slice is empty.
      1. VTDownMod
    2. VO
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      1. POException in thread "main" java.lang.NullPointerException
      1. This table or related slice is empty.
      1. VTDownMod
    1. COHave you debugged through to see what is null?
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      1. POException in thread "main" java.lang.NullPointerException
      1. USDan W
    2. COThe AniScreen constructor is failing. Where is that code?
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      1. POException in thread "main" java.lang.NullPointerException
      1. USMadConan
    3. COThe issue is in `AniScreen`, which you haven't shown.
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      1. POException in thread "main" java.lang.NullPointerException
      1. USroippi
 

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