7 replies to this topic

[eman ahmed]

hi all
I want to know how can I find the implementation of some classes in java
ex. I want to know the implementation of method charAt in class string

[Sinipull]

Download java source code: http://www.java.net/...30_aug_2010.jar
it's all there.

    public char charAt(int index) {
        if ((index < 0) || (index >= count)) {
            throw new StringIndexOutOfBoundsException(index);
        }
        return value[index + offset];
    }

as you might have guessed. String is actually array of chars, and charAt returns a certain character from the array.

[eman ahmed]

I downloaded JDK, but I'mnot found what I search

[wim DC]

If you're using eclipse i believe it's ctrl+shift+T or so, it's called "open type" and if you type "String" there, or any other class it will open it. Other IDEs most likely also have such a feature.

[Sinipull]

Oxano, i don't think Eclipse comes with the source. I believe it only contains the compiled bytecode by default. It's "control" key, that takes user to the requested source, but it just says "source not found".

eman ahmed, look at there: \j2se\src\share\classes\java\

[wim DC]

never mind :-P

[eman ahmed]

thanks to all , but I'm still have the same problem

[wim DC]

In 'C:\Program Files\Java\jdk1.6.0_21' (jdk version may vary) I got this file 'src.zip' which contains all the .java files of all the classes.