i need help for MouseListener

[sfaxianovic]

i develop a chess game with java
i used bitboard for programming chess rule but when i did the graphic part i found some problem when i click the Label of a figure in chess board some exception accured :
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at interfaceGr.Echiquier$FigurePiece.mouseReleased(Ec hiquier.java:107)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent( Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(U nknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unkno wn Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilter s(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(U nknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarch y(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)





is someone can tell me what this mean

[Fubarable]

Have you had a look at class Echiquier line 107? What objects are there? Have you tested them to see if any are null? Sounds like time for some serious debugging. Good luck!

[Eranga]

Simply debug and see. Check any null values as Fubarable says.