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Thread: jform

  1. #1
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    Default jform

    i have created a form and able to browse file by a button to a text field and i am trying to change the content of that file into array of bytes by another button with a radio button click and display them into the text area i couldnt display them to the text area instead i got these errors help.



    java.lang.NullPointerException
    at javax.swing.text.DefaultEditorKit.read(DefaultEdit orKit.java:197)
    at javax.swing.text.JTextComponent.read(JTextComponen t.java:1598)
    at hiding.encryptiondecryption.encryptButtonActionPer formed(encryptiondecryption.java:270)
    at hiding.encryptiondecryption.access$300(encryptiond ecryption.java:23)
    at hiding.encryptiondecryption$4.actionPerformed(encr yptiondecryption.java:107)
    at javax.swing.AbstractButton.fireActionPerformed(Abs tractButton.java:1995)
    at javax.swing.AbstractButton$Handler.actionPerformed (AbstractButton.java:2318)
    at javax.swing.DefaultButtonModel.fireActionPerformed (DefaultButtonModel.java:387)
    at javax.swing.DefaultButtonModel.setPressed(DefaultB uttonModel.java:242)
    at javax.swing.plaf.basic.BasicButtonListener.mouseRe leased(BasicButtonListener.java:236)
    at java.awt.Component.processMouseEvent(Component.jav a:6263)
    at javax.swing.JComponent.processMouseEvent(JComponen t.java:3267)
    at java.awt.Component.processEvent(Component.java:602 8)
    at java.awt.Container.processEvent(Container.java:204 1)
    at java.awt.Component.dispatchEventImpl(Component.jav a:4630)
    at java.awt.Container.dispatchEventImpl(Container.jav a:2099)
    at java.awt.Component.dispatchEvent(Component.java:44 60)
    at java.awt.LightweightDispatcher.retargetMouseEvent( Container.java:4574)
    at java.awt.LightweightDispatcher.processMouseEvent(C ontainer.java:4238)
    at java.awt.LightweightDispatcher.dispatchEvent(Conta iner.java:4168)
    at java.awt.Container.dispatchEventImpl(Container.jav a:2085)
    at java.awt.Window.dispatchEventImpl(Window.java:2475 )
    at java.awt.Component.dispatchEvent(Component.java:44 60)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java: 599)
    at java.awt.EventDispatchThread.pumpOneEventForFilter s(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(E ventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarch y(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:161)
    at java.awt.EventDispatchThread.run(EventDispatchThre ad.java:122)


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: jform

    java.lang.NullPointerException
    at javax.swing.text.DefaultEditorKit.read(DefaultEdit orKit.java:197)
    at javax.swing.text.JTextComponent.read(JTextComponen t.java:1598)
    at hiding.encryptiondecryption.encryptButtonActionPer formed(encryptiondecryption.java:270)
    Look at line 270 and find the variable with the null value and then change the code so the variable is not null.
    If you don't understand my answer, don't ignore it, ask a question.

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