空指针异常怎么解决求解

2014-06-26 10:08:10 184 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

MYSQL&JDBC空指针异常问题求解~~ MYSQL&amp;JDBC空指针异常问题求解~~ public class TestMyDataSource { /* * 添加用户 * 使用未改造过的Connection */ @Test public void testAddUser(){ Connection conn = null; PreparedStatement pstmt = null; //1.创... 阅读详情

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(ImageIcon.java:138)
at cn.com.apple.GameJFrame$light.<init>(GameJFrame.java:879)
at cn.com.apple.GameJFrame.startMouseClicked(GameJFrame.java:693)
at cn.com.apple.GameJFrame.access$800(GameJFrame.java:27)
at cn.com.apple.GameJFrame$9.mouseClicked(GameJFrame.java:458)
at java.awt.Component.processMouseEvent(Component.java:6044)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
at java.awt.Component.processEvent(Component.java:5806)
at java.awt.Container.processEvent(Container.java:2058)
at java.awt.Component.dispatchEventImpl(Component.java:4413)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Component.dispatchEvent(Component.java:4243)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3995)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
at java.awt.Container.dispatchEventImpl(Container.java:2102)
at java.awt.Window.dispatchEventImpl(Window.java:2440)
at java.awt.Component.dispatchEvent(Component.java:4243)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

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