Built in classes in Java

Question

Java contains many built in classes. I seeked someof them in the Java API documentation but I couldnt see or find the body of these classes and their related methods.

For example when I seeked the clearRect method of the graphics glass I found just the informations as follows without much details.

> public abstract void clearRect(int x,
>              int y,
>              int width,
>              int height)

Clears the specified rectangle by filling it with the background color of the current drawing surface. This

operation does not use the current paint mode. Beginning with Java 1.1, the background color of offscreen images may be system dependent. Applications should use setColor followed by fillRect to ensure that an offscreen image is cleared to a specific color.

Parameters: x - the x coordinate of the rectangle to clear. y - the y coordinate of the rectangle to clear. width - the width of the rectangle to clear. height - the height of the rectangle to clear. See Also: fillRect(int, int, int, int), drawRect(int, int, int, int), setColor(java.awt.Color), setPaintMode(), setXORMode(java.awt.Color)

Is there any way to find the source code of these classes ? Or are they hidden by the constructors of Java for some reasons ?

This might answer your question: http://stackoverflow.com/questions/2896727/where-to-find-java-jdk-source-code — Bohuslav Burghardt, Dec 11 '14 at 19:11
http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/6-b14/sun/java2d/SunGraphics2D.java#2363 — Marko Topolnik, Dec 11 '14 at 19:13

score 0 · Answer 1 · answered Dec 11 '14 at 19:13

0

Download the Java jdk. The source code is in src.zip. Alternatively check this link out:

http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/6-b14/java/lang/Class.java

answered Dec 11 '14 at 19:13

ucsunil

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Built in classes in Java

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