The GNU General Public License is often called the GNU GPL for short; it is used by most GNU programs, and by more than half of all free software packages.
Copyleft is a general method for making a program free software and requiring all modified and extended versions of the program to be free software as well.
Copyleft also provides an incentive for other programmers to add to free software. Important free programs such as the GNU C++ compiler exist only because of this.
The appropriate license is included in many manuals and in each GNU source code distribution.
Compiler information
You can use JBuilder2006 foundation version to compile our source code.
Source code information
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