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Location of Java packages

Richards Milan

Joined: Jun 24, 2012
Posts: 29

Guys I have a doubt regarding the location of "packages of JAVA API " is it in the JDK folder or JRE folder ?

Do you know why Java programmers wear specs ? Its because they don't 'C#'
Campbell Ritchie

Joined: Oct 13, 2005
Posts: 46397
Please don’t add a new question to an existing discussion. I have separated your question off.

Not sure. But I think the .class files are all bundled into a file called rt.jar. So explore your Java™ installation folder and find rt.jar. On a Linux box, you can use Archive Manager to explore the contents of that file, but I don’t know whether there is a corresponding program on Windows®. If you can’t explore it, try copying it to a temporary location and unzipping it. Then you can explore it and play with it, secure in the knowledge you aren’t damaging your installation because you took a copy.
Jesper de Jong
Java Cowboy
Saloon Keeper

Joined: Aug 16, 2005
Posts: 15092

What do you mean exactly?

The classes of the standard Java API are in a file named rt.jar, which is included in both the JDK and the JRE.

You can find the source code of these classes in a file named which is in your JDK installation directory.

Java Beginners FAQ - JavaRanch SCJP FAQ - The Java Tutorial - Java SE 8 API documentation
Campbell Ritchie

Joined: Oct 13, 2005
Posts: 46397
There would only be one thing better than beating Jesper’s post by 17 seconds . . .
I agree. Here's the link:
subject: Location of Java packages
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