Java's built-in libraries implementation

Question

Does anyone happen to know where, if at all possible, I can take a look at the code of the java's built-in libraries?

I've tried Ctrl + Shift + B (which is the Netbeans' equivalence of Eclipse's Ctrl + Shift T) to "go to source", but I can only see the method header, and the body is always:

//compiled code
throw new RuntimeException("Compiled Code");

For instance, I'd see the following if I tried to view String.charAt(int)

public char charAt(int i)
{
    //compiled code
    throw new RuntimeException("Compiled Code");
}

Do you mean the JDK? Because you can get the source for the JDK easy as pie. — Bohemian, Apr 13 '12 at 05:21
Refer to this topic - http://stackoverflow.com/questions/4512066/how-to-get-java-decompiler-jd-jd-eclipse-running-in-eclipse-helios - for more help. — Sanjeev Kulkarni N, Apr 13 '12 at 05:24

score 6 · Accepted Answer · answered Apr 13 '12 at 05:22

6

built-in libraries source code is available with jdk. For example on a windows box the jdk folder would contain src.zip which contain the sources for the built-in libraries

Hope this helps.

answered Apr 13 '12 at 05:22

krishnakumarp

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Thilo · Answer 2 · 2012-04-13T05:28:10.403

2

Sure, JDK is distributed with sources, you can conveniently open them in your IDE. Look for "src.jar".

It probably already is set up. In Eclipse, just try to Ctrl-Shift-T something like "java.lang.String".

A web search will also turn up nicely linked and formatted pages.

edited Apr 13 '12 at 05:28

answered Apr 13 '12 at 05:21

Thilo

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I tried `Ctrl + Shift + B`, which is the Netbeans' equivalence of `Ctrl + Shift + T`, but I can only see the method header, where the body is `//compiled code` `throw new RuntimeException("Compiled Code");` – One Two Three Apr 13 '12 at 05:42

score 0 · Answer 3 · edited Apr 13 '12 at 05:20

0

Google "java decompiler" and download it. You can see the source code for any class file in the libraries.

edited Apr 13 '12 at 05:20

Michael Petrotta

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answered Apr 13 '12 at 05:19

Chandra Sekhar

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score 0 · Answer 4 · answered Feb 01 '13 at 06:13

0

You can also use jad to decompile any .class file

answered Feb 01 '13 at 06:13

naeemgik

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Java's built-in libraries implementation

4 Answers4

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