Question

how to run ant with j2sdk1.4.2.19

Asked by: gudii9

Hi,

My computer classpath, path etc set up for j2sdk 1.5 to run eclipse 3.4.1. I need to run the ant scripts from command prompt through j2sdk1.4.2.19.
I am giving command like

>>>>ant -buildfile build.xml
which by default run through j2sdk1.5.

How can i change above command or give additional option command to run through j2sdk1.4.2.19.

Any ideas, sample code, resources , links highly appreciated. Thanks in advance

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Asked On
2009-08-18 at 10:40:18ID24662254
Topics

ANT

,

Java Programming Language

,

J2EE

Participating Experts
2
Points
500
Comments
11

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Answers

 

by: CEHJPosted on 2009-08-18 at 10:47:39ID: 25125703

Just set JAVA_HOME to the 1.4 installation directory. PATH will of course contain %JAVA_HOME%\bin (in Windows)

 

by: gudii9Posted on 2009-08-18 at 10:53:39ID: 25125761

I do not want to change JAVA_HOME or Path, Classpath etc on the machine since many applications are dependent on it. Is there is a way i can give j2sdk as option within the ant command itself. Please advise

 

by: ozlevanonPosted on 2009-08-18 at 11:06:14ID: 25125873

You can set JAVA_HOME locally, in the command prompt. When you do that, it will only affect the current prompt, and nothing else on the machine.
To do so write, in the command prompt
set JAVA_HOME=xxx
You may find it easier to create a batch file to run your ant in jdk 1.4, instead of doing this every time. When you run a batch file the JAVA_HOME will change only for that execution. The batch file will look like this:
@echo off
set JAVA_HOME=xxx
ant ...

 

by: ozlevanonPosted on 2009-08-18 at 11:09:19ID: 25125904

Save the file with an extension .bat and then you can launch it from prompt, or directly from windows explorer.

 

by: CEHJPosted on 2009-08-18 at 11:09:50ID: 25125911

>>I do not want to change JAVA_HOME or Path, Classpath etc on the machine since many applications are dependent on it.

That would only affect the current console session. You could also do

ant -Djava.home=PATHTO1.4 thetask

 

by: gudii9Posted on 2009-08-18 at 12:16:52ID: 25126529

I tried like

>>>>set  D:\Program Files\Java\jdk1.4

but it did not work.

When i say java -version in command line within same command prompt shell  still says old version only. Please advise

 

by: ozlevanonPosted on 2009-08-18 at 12:22:48ID: 25126587

Did you write "set  D:\Program Files\Java\jdk1.4" or "set JAVA_HOME="D:\Program Files\Java\jdk1.4" "? Be sure to set JAVA_HOME and put the directory in quotes (since it contains a space). After doing it run
echo %JAVA_HOME%
to check the value.

Whatever you do, it won't change the java version you see in "java -version", because that is decided by finding the first "java.exe" in the directories in "PATH" variable. If you want to change that, you need to change the PATH variable using
set PATH="D:\Program Files\Java\jdk1.4\bin"

 

by: ozlevanonPosted on 2009-08-18 at 12:36:45ID: 25126724

If you want to add the jdk1.4 directory to the path, but leave the other directories in the path (so that you can run other executables), use this:
set PATH=D:\Program Files\Java\jdk1.4\bin;%PATH%
This will place the jdk 1.4 bin directory first, so that java.exe will be executed from it.

 

by: gudii9Posted on 2009-08-18 at 12:48:23ID: 25126856

I see i missed double quotes and also

echo %JAVA_HOME% this shows correctly 1.4 to me now

 

by: CEHJPosted on 2009-08-18 at 13:08:43ID: 25127091

>>you need to change the PATH variable using
set PATH="D:\Program Files\Java\jdk1.4\bin"

You would need

set PATH="%JAVA_HOME%\bin";%PATH%

as i mentioned in my first comment, then it's always correct

 

by: gudii9Posted on 2009-08-18 at 13:35:31ID: 31617207

thank you very much

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