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From "Vasily Zakharov (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HARMONY-2613) [classlib][swing][plaf] javax.swing.plaf.basic.BasicTableUI methods throw unspecified NPE if UI is not attached to a table
Date Wed, 07 Feb 2007 00:17:06 GMT

    [ https://issues.apache.org/jira/browse/HARMONY-2613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12470779
] 

Vasily Zakharov commented on HARMONY-2613:
------------------------------------------

In BasicTableHeaderUI affected methods are uninstallDefaults() and MouseInputHandler methods
mouseEntered() and mouseExited().


> [classlib][swing][plaf] javax.swing.plaf.basic.BasicTableUI methods throw unspecified
NPE if UI is not attached to a table
> --------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HARMONY-2613
>                 URL: https://issues.apache.org/jira/browse/HARMONY-2613
>             Project: Harmony
>          Issue Type: Bug
>          Components: Classlib
>            Reporter: Anton Luht
>            Priority: Minor
>
> If BasicTableUI  is not attached to a JTable (for example, using installUI), calling
some methods on it cause NPE. Please see the code below for example, but the code inspection
shows that there are many methods that can cause similar effect (direct calling methods of
member 'table' without checking it for null) . If you uncomment line with 'installUI', the
test will work on Harmony as well as on RI
> Code to reproduce:
> import javax.swing.plaf.basic.*;
> import javax.swing.*;
> import java.awt.*;
> import java.awt.event.MouseWheelEvent;
> public class Test   
> {
>         public static MouseWheelEvent getEvent() {
>                 Label l = new Label();
>                 return new MouseWheelEvent(l, 0, 0, 0, 0, 0, 0, false, 0,
> MouseWheelEvent.WHEEL_UNIT_SCROLL, 0);
>         }
>         public static void main(String args[]) {
>                 BasicTableUI localBasicTableUI = new BasicTableUI();
>                 //localBasicTableUI.installUI(new JTable());
>                 BasicTableUI.MouseInputHandler
> localBasicTableUI$MouseInputHandler = localBasicTableUI.new
> MouseInputHandler();
>                 MouseWheelEvent localMouseWheelEvent = getEvent();
>                 try {
>                        
> localBasicTableUI$MouseInputHandler.mousePressed(localMouseWheelEvent);
>                         System.out.println("mousePressed work silently");
>                 } catch (NullPointerException e) {
>                         e.printStackTrace();
>                         System.out.println("Got NullPointerException");
>                 }
>         }
> }
> output in RI:
> java version "1.5.0_06"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
> Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode)
> mousePressed work silently
> Output in Harmony:
> Apache Harmony Launcher : (c) Copyright 1991, 2006 The Apache Software Foundatio
> n or its licensors, as applicable.
> java version "1.5.0"
> pre-alpha : not complete or compatible
> svn = r485537, (Dec 11 2006), Windows/ia32/msvc 1310, debug build
> http://incubator.apache.org/harmony
> java.lang.NullPointerException
>         at javax.swing.plaf.basic.BasicTableUI$MouseInputHandler.mousePressed(Ba
> sicTableUI.java:122)
>         at Test.main(Test.java:20)
> Got NullPointerException

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