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Null pointer Exception

 
Mikael Fox
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Posts: 23
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Hello,
I am having a null pointer error, don't know where it came out. Can someone check this code for me please:

The error is in the sendBytes methods, I have put a comment over there, actually there are two null errors. Line 57 and 64.

1.


2.

Thanks a lot in advance.




This is the code:




This is the error:

run-single:
java.lang.NullPointerException
at ignisftpv3.FTPClient.sendBytes(FTPClient.java:85)
at ignisftpv3.FTPClientInterface.btnSendActionPerformed(FTPClientInterface.java:121)
at ignisftpv3.FTPClientInterface.access$100(FTPClientInterface.java:8)
at ignisftpv3.FTPClientInterface$2.actionPerformed(FTPClientInterface.java:48)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6038)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3260)
at java.awt.Component.processEvent(Component.java:5803)
at java.awt.Container.processEvent(Container.java:2058)
at java.awt.Component.dispatchEventImpl(Component.java:4410)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
at java.awt.Container.dispatchEventImpl(Container.java:2102)
at java.awt.Window.dispatchEventImpl(Window.java:2429)
at java.awt.Component.dispatchEvent(Component.java:4240)
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)
BUILD SUCCESSFUL (total time: 3 minutes 10 seconds)
 
Paul Clapham
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The pw and out variables are null because you never assign them a value. Sure, you have some code which would assign them values if it were executed, but it wasn't executed. (You can tell that because pw and out are null.)

If you look at your stderr output, you should be able to see why that code wasn't executed.
 
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