Java Newb, null pointer question...

[hugstable]

trying to compile some code in creator 2 (on a Mac)

got the following blowup:

java.lang.NullPointerException
	at com.sun.rave.jsf.project.ext.RaveWebActionProvider.updateWebXml(RaveWebActionProvider.java:967)
	at com.sun.rave.jsf.project.ext.RaveWebActionProvider.invokeAction(RaveWebActionProvider.java:203)
	at org.netbeans.modules.project.ui.actions.MainProjectAction.actionPerformed(MainProjectAction.java:90)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1882)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2202)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
	at javax.swing.AbstractButton.doClick(AbstractButton.java:334)
	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1000)
	at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1041)
	at java.awt.Component.processMouseEvent(Component.java:5554)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
	at java.awt.Component.processEvent(Component.java:5319)
	at java.awt.Container.processEvent(Container.java:2010)
	at java.awt.Component.dispatchEventImpl(Component.java:4021)
	at java.awt.Container.dispatchEventImpl(Container.java:2068)
	at java.awt.Component.dispatchEvent(Component.java:3869)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4256)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3936)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3866)
	at java.awt.Container.dispatchEventImpl(Container.java:2054)
	at java.awt.Window.dispatchEventImpl(Window.java:1774)
	at java.awt.Component.dispatchEvent(Component.java:3869)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:269)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:184)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:176)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

Pls point me in the right direction as to what could be wrong.... i am very new to this and need some help...

the source that caused the bomb to go off was

package com.brainysoftware;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;

public class MyCustomTag extends TagSupport {

  public int doEndTag() throws JspException {
    JspWriter out = pageContext.getOut();
    try {
      out.println("Hello from the custom tag.");
    } 
    catch (Exception e) {
    }
    return super.doEndTag();
  }
}

all help is greatly appreciated... thanks!

 

[sedj]

You are hiding the exception trace ... never to this.

Do

    try {
      out.println("Hello from the custom tag.");
    } 
    catch (Exception e) {
        e.printStackTrace();
        throw new JspException("Caught exception writing content from tag, orig exception : " +e);
    }

And then post the original exception trace

--------------------------------------------------
Free Java/J2EE Database Connection Pooling Software

http://www.primrose.org.uk

 

[hugstable]

it wont compile... i added that code and when i compile i get almoste the same error...
THANKS FOR TRYING TO HELP...

java.lang.NullPointerException
	at com.sun.rave.jsf.project.ext.RaveWebActionProvider.updateWebXml(RaveWebActionProvider.java:967)
	at com.sun.rave.jsf.project.ext.RaveWebActionProvider.invokeAction(RaveWebActionProvider.java:203)
	at org.netbeans.modules.project.ui.actions.FileCommandAction.actionPerformed(FileCommandAction.java:73)
	at org.netbeans.modules.project.ui.actions.LookupSensitiveAction.actionPerformed(LookupSensitiveAction.java:88)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1882)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2202)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
	at javax.swing.AbstractButton.doClick(AbstractButton.java:334)
	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1000)
	at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1041)
	at java.awt.Component.processMouseEvent(Component.java:5554)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
	at java.awt.Component.processEvent(Component.java:5319)
	at java.awt.Container.processEvent(Container.java:2010)
	at java.awt.Component.dispatchEventImpl(Component.java:4021)
	at java.awt.Container.dispatchEventImpl(Container.java:2068)
	at java.awt.Component.dispatchEvent(Component.java:3869)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4256)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3936)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3866)
	at java.awt.Container.dispatchEventImpl(Container.java:2054)
	at java.awt.Window.dispatchEventImpl(Window.java:1774)
	at java.awt.Component.dispatchEvent(Component.java:3869)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:269)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:184)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:176)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

 

[Diancecht]

Check that both pageContext and the PrintStream you get are not null.

Cheers,
Dian

 

[sedj]

Thats not a compiler error - thats a runtime error.

Anyway, no-where in that stack trace can I see any method being executed that matches with the code that you have posted ...

--------------------------------------------------
Free Java/J2EE Database Connection Pooling Software

http://www.primrose.org.uk

 

[hugstable]

i compiled it in creator - i am working on installing tomcat on my mac... i want to try and compile from javac... i will post those errors in a few...

 

[hugstable]

you are 100% right... compiled fine on my tux box.... Looks like a creator 2 issue... GO SUN!

IF THERE ARE ANY CREATOR 2 USERS WHO CAN HELP ME OUT.... please let me know what the f*ck i am doing wrong... spent all day on this like a tool.... very disapointing.