Where can I find the source code for the Java library classes? I mean classes in rt.jar.
Platform: Windows.
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when you install the jdk there is an option to also install the sources. after that you will find them in the src.zip just as said belowclamp– clamp2010-02-13 17:44:48 +00:00Commented Feb 13, 2010 at 17:44
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where is the source code of tools.jarNick Dong– Nick Dong2013-08-29 06:47:23 +00:00Commented Aug 29, 2013 at 6:47
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8 Answers
For old versions of Java with separate JRE and JDK downloads, download the JDK. The sources for the public classes are in src.zip.
answered Feb 13, 2010 at 15:27
Thorbjørn Ravn Andersen
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4 Comments
GuruKulki
i have jdk1.6. can you tell me the path where it lies.
skaffman
It's in
src.zip in the JDK installation, like he just said.GuruKulki
i don't have it in the installation folder.
duffymo
Then you probably downloaded the JRE, not the JDK. That's the case if you don't have a /bin directory.
Here's the browsable source code for OpenJDK 7.
Update: As of June 2018 grepcode seems to be down. Here you can find an alternative.
Update^2: As of October 2020, the two previous links do not work. View it at OpenJDK and vote up the answer by Nosrep, which I got it from.
1 Comment
CleanBold
Both links are down as of Oct-2020. See answer by Nosrep. The link mentioned in his answer is working fine. hg.openjdk.java.net/jdk8/jdk8/jdk/file/tip/src/share/classes
Sources are in src.zip located in the installation folder:
On Windows, the JDK includes
src.zipby default if I remember well.On a Linux distro, you may have to install the
sun-java6-sourcepackage.On Mac, you'll have to download the Developer Documentation. Have a look at this answer.
answered Feb 13, 2010 at 16:02
Pascal Thivent
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brat
Could not find SecretKey Interface looking there :-/
As almost all the suggestions seem to be either grepcode or zgrepcode which are both down, I found one from OpenJDK here: http://hg.openjdk.java.net/jdk8/jdk8/jdk/file/tip/src/share/classes/
Edit: a more complete version of all OpenJDK projects and JDK 6-15 can be found here: https://hg.openjdk.java.net/
Edit Edit: Apparently there's a jdk Github repository now, dunno if it was created after this answer or I just couldn't find it; either way: https://github.com/openjdk/jdk
Harder to find classes than in the mercurial repository for me at least, but for example here is the ArrayList file: https://github.com/openjdk/jdk/blob/master/src/java.base/share/classes/java/util/ArrayList.java
Or, yknow just use search
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If you only need to have a look at the source/implemenation, i would suggest using
Edit
GrepCode is even better
1 Comment
Travis Gockel
This is a wonderful resource for quickly browsing an implementation.
You can directly browse the code online here for Java : https://zgrepcode.com/java/openjdk/10.0.2/
It is a great tool also for browsing most of the open source projects as it gives you internal linking to classes.
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As mention above, most of the source files can be found by downloading the SDK. However for some classes you can find the source code (javax.ssl etc') for I suggest adding the jad eclipse plugin that will decompile any class without using external site such as Docjar. Jad eclipse info: http://jadclipse.sourceforge.net/wiki/index.php/Main_Page
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There is also grepcode.com (not sure how old this site is, perhaps this answer is an update for new solutions now), sample query:
http://grepcode.com/search?query=java.lang.Math.sin&start=0&entity=type&n=
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