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Is it possible to use multiple JDK's?

john price
Ranch Hand

Joined: Feb 24, 2011
Posts: 495

Is it possible to use multiple JDK's? I need two because of clients that won't upgrade yet. I need to have 2 JDK's, working and installed. Would I just have to keep switching the path to the different versions? I need one for personal projects (and testing) and one for projects to be released.

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Rob Spoor
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Joined: Oct 27, 2005
Posts: 19718
    
  20

Correct. I've had a Java 1.4 and a Java 6 JDK installed simultaneous for years at work. Right now, at home I have a Java 6 and a Java 7 JDK installed. To start using the Java 7 JDK all I had to do was modify the JAVA_HOME variable, as that's what I'm using inside the PATH variable.


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john price
Ranch Hand

Joined: Feb 24, 2011
Posts: 495

Cool, thanks! Is there an easy way to modify the variables? In Windows, without going to the "Environment Variables". Aka, is there a command I can type to change the variable?
Thanks,
John Price
Campbell Ritchie
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Joined: Oct 13, 2005
Posts: 39393
    
  28
Try
set PATH="C:\Program Files\jdk1.2.3_04\bin";$PATH$
or similar when you open your command line.
Campbell Ritchie
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Joined: Oct 13, 2005
Posts: 39393
    
  28
If $PATH$ doesn't work try %PATH% instead. Sorry for the mistake.
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 39393
    
  28
You can also declare the path in full whenever you invoke a command. Instead of writing java Foo try "C:\Program Files\java\jdk1.2.3_45\bin\java" Foo
You may need quote marks because the path includes spaces.
 
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