[Bug 1102616] Re: java keyListener fails to detect miscellaneous compatibility settings for numPad

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: java-common (Ubuntu)
       Status: New => Confirmed

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Title:
  java keyListener fails to detect miscellaneous compatibility settings
  for numPad

Status in “java-common” package in Ubuntu:
  Confirmed

Bug description:
  There is a miscellaneous keyboard layout setting in Ubuntu that does
  not work as intended for Java. This was the same for me using the
  default JDK and also Oracle JDK. This could be a problem at the
  setting level, but I am unclear where else to file this bug, since it
  pertains to the JDK.

  Here is the miscellaneous setting:
    Ubuntu Settings
      Keyboard Layout
        Options
          Misc. Compatibility Options
            Numeric keypad keys always enter digits (as in Mac OS) -> SET TO TRUE

  This setting helps for those people using both a laptop keyboard with
  a "hidden" numpad, like on my old MacBook, and they also wish to have
  an external keyboard, which works for typing numbers with the number
  pad. Without this setting, I cannot achieve both of these features
  simultaneously, and it would otherwise cause me to write a script to
  detect whether an external keyboard is plugged in. So, this setting
  makes sense and works in most applications in Ubuntu. But not in Java-
  based applications, from what I can tell.

  The attached Java file reproduces the key recognition, where this
  miscellaneous setting enabled still detects the special keys (home,
  page up, page down, etc.) as keyPressed and keyReleased events, as if
  the numLock is disabled. However, with the setting enabled,  Java's
  keyTyped will detect the proper number. So, it is detecting both keys
  at the same time.

  As a summary, there is a problem in key recognition in Java when both
  the miscellaneous setting in Ubuntu is enabled AND the numLock is OFF.
  This is a problem, for example, if you have a program written in Java
  that is a text editor (e.g. Netbeans). Typing the numPad 7 key will
  result in moving the cursor to the "Home" location AND type the number
  7 in the editor. The desired effect, with this setting, would have
  only the number 7 being typed.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: default-jdk 1:1.7-43ubuntu3
  ProcVersionSignature: Ubuntu 3.5.0-22.34-generic 3.5.7.2
  Uname: Linux 3.5.0-22-generic i686
  NonfreeKernelModules: wl
  ApportVersion: 2.6.1-0ubuntu9
  Architecture: i386
  Date: Mon Jan 21 12:48:33 2013
  InstallationDate: Installed on 2012-08-25 (149 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: java-common
  UpgradeStatus: Upgraded to quantal on 2012-11-19 (62 days ago)

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