 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Java Forum / First Aid / June 2007how does windows find java.exe?
How does windows find java.exe if I type "java" in the command line and if java.exe is not in the path? I know that there is a registry key HKEY_LOCAL_MACHINE\SOFTWARE \JavaSoft\Java Runtime Environment but I guess windows does not know about it. JMS > How does windows find java.exe if I type "java" in the command line > and if java.exe is not in the path? I bet java.exe *is* in your path. On my system Java-setup has installed a copy of java.exe in directory "C:\windows\system32\", and "C:\windows\system32\" is part of the PATH environment variable. > I know that there is a registry key HKEY_LOCAL_MACHINE\SOFTWARE > \JavaSoft\Java Runtime Environment but I guess windows does not know > about it.  SignatureThomas On Tue, 26 Jun 2007 07:09:41 -0700, Martin <EdkIlhKpnBbr@spammotel.com> wrote, quoted or indirectly quoted someone who said : >How does windows find java.exe if I type "java" in the command line >and if java.exe is not in the path? > >I know that there is a registry key HKEY_LOCAL_MACHINE\SOFTWARE >\JavaSoft\Java Runtime Environment but I guess windows does not know >about it. There is a way of putting any file no matter where it is, on the path by creating a registry entry. See http://mindprod.com/jgloss/registry.html However, that is not how Sun did it. Further, they did not add the JRE path to the execution path. Here is the trick. They place a spare copy of java.exe in C:\Windows\System32\java.exe which IS on the path. It starts up, looks in the registry to figure out the official java.exe. then starts that. See http://mindprod.com/jgloss/registry.html -- Roedy Green Canadian Mind Products The Java Glossary http://mindprod.com : There is a way of putting any file no matter where it is, on the path : by creating a registry entry. See : http://mindprod.com/jgloss/registry.html HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths but I don't think that is quite the same putting it on the path. The registry entry makes them visible to the START command, as in C:> START program-not-in-PATH-but-is-in-REGISTRY.exe But if you simply type the name of a command as in C:> PROGRAM.exe then it must be either in the current directory or in a directory listed in the PATH environment variable. (Though some entries in the registry do control which directories are listed in each user's PATH variable.) $0.10 >HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths > [quoted text clipped - 11 lines] >in the PATH environment variable. (Though some entries in the registry do >control which directories are listed in each user's PATH variable. IIRC I have added programs to the App Paths and then I can invoke them with just xxxx on the command line in 4NT. Don't recall about xxxx.exe. -- Roedy Green Canadian Mind Products The Java Glossary http://mindprod.com : >HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths : > [quoted text clipped - 11 lines] : >in the PATH environment variable. (Though some entries in the registry do : >control which directories are listed in each user's PATH variable. : IIRC I have added programs to the App Paths and then I can invoke them : with just xxxx on the command line in 4NT. Don't recall about : xxxx.exe. This is XP, and so far it still doesn't work for me, I can't run programs already listed there (except using START) with or without the extension. The existing entries are keys, so I added a string value directly at that level, but that didn't work either, even after logout and login. Perhaps there's some other setting that must be toggled to enable this. >This is XP, and so far it still doesn't work for me, I can't run programs >already listed there (except using START) with or without the extension. [quoted text clipped - 3 lines] > >Perhaps there's some other setting that must be toggled to enable this. I have done some research on this. It turns out we are both right in our observations. See http://mindprod.com/jgloss/registry.html#AUXPATH You might also find interesting: http://mindprod.com/jgloss/registry.html#JAVAFIND on how Java finds its various executables. -- Roedy Green Canadian Mind Products The Java Glossary http://mindprod.com > I have done some research on this. It turns out we are both right in > our observations. > > See http://mindprod.com/jgloss/registry.html#AUXPATH AppPath entries are very useful. You can set a specific PATH for an executable without modifying the global system PATH. Bye. SignatureReal Gagnon from Quebec, Canada * Java, Javascript, VBScript and PowerBuilder code snippets * http://www.rgagnon.com/howto.html * http://www.rgagnon.com/bigindex.html > Here is the trick. They place a spare copy of java.exe in > C:\Windows\System32\java.exe Oh....simply and dirty! Thanks! JMS On Wed, 27 Jun 2007 02:06:48 -0700, Martin <EdkIlhKpnBbr@spammotel.com> wrote, quoted or indirectly quoted someone who said : >> Here is the trick. They place a spare copy of java.exe in >> C:\Windows\System32\java.exe > >Oh....simply and dirty! >Thanks! Sun is going to use methods easy to port with minimal changes to different OS's, not necessarily the slickest for any given OS. -- Roedy Green Canadian Mind Products The Java Glossary http://mindprod.com Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
|
Reply to this Message
|
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.