我在網上發現了一個磚頭破碎機遊戲的java源代碼。我下載並試圖運行它,但它給了我一個NullPointerException。什麼是這個例外,我該如何解決它?謝謝。Java遊戲無法正常工作
http://zetcode.com/tutorials/javagamestutorial/breakout/
這裏是堆棧跟蹤:
Exception in thread "main" java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(ImageIcon.java:181)
at Ball.<init>(Ball.java:16)
at Board.gameInit(Board.java:48)
at Board.addNotify(Board.java:43)
at java.awt.Container.addNotify(Container.java:2578)
at javax.swing.JComponent.addNotify(JComponent.java:4685)
at java.awt.Container.addNotify(Container.java:2578)
at javax.swing.JComponent.addNotify(JComponent.java:4685)
at java.awt.Container.addNotify(Container.java:2578)
at javax.swing.JComponent.addNotify(JComponent.java:4685)
at javax.swing.JRootPane.addNotify(JRootPane.java:739)
at java.awt.Container.addNotify(Container.java:2578)
at java.awt.Window.addNotify(Window.java:663)
at java.awt.Frame.addNotify(Frame.java:470)
at java.awt.Window.show(Window.java:859)
at java.awt.Component.show(Component.java:1584)
at java.awt.Component.setVisible(Component.java:1536)
at java.awt.Window.setVisible(Window.java:842)
at Breakout.<init>(Breakout.java:14)
at Breakout.main(Breakout.java:18)
Exception in thread "Timer-0" java.lang.NullPointerException
at Board$ScheduleTask.run(Board.java:110)
at java.util.TimerThread.mainLoop(Timer.java:512)
at java.util.TimerThread.run(Timer.java:462)
顯然,這個代碼應該工作,但事實並非如此。
您使用哪個java版本編譯遊戲?,下載最新版本 – DGomez 2012-04-16 19:06:29
@DGomez異常輸出並不表示版本不匹配。看到答案。 – 2012-04-16 19:29:59