need sugestion for understand openjdk!

[Mandar Khire]

I download openjdk latest version for study
There are lots of c & cpp & h files,i confuse about which IDE should use for those like eclipse or netbean for java!
I also download jtreg-4.1 but i cant use it...is it for open complete project of openjdk or module within it?
Many header files common in these languages jav c, c++ use for java indirectly. but proprietary is different...eg
stdio.h, i seen in 2 different IDE Borland c & visual studio...
in Borland c it shows 'Copyright (c) 1987, 1991 by Borland International'
In Microsoft Visual studio it shows Copyright (c) Microsoft Corporation. All rights reserved.

in opejdk i found in stdhdrs.h file, it declare standard Windows and C headers... can i consider it that java use few microsoft propitiatory files?
Its not main question..but just curiosity..

[Jesper de Jong]

Files such as stdio.h are part of the standard C library. Every C compiler that conforms to the standard for the C programming language comes with stdio.h and a number of other standard files.

The implementation of those files is up to whoever wrote the compiler. So if you use Microsoft Visual C++, you get a version of stdio.h written by Microsoft. If you use Borland C++, you'll get a version written by Borland. It's just like the standard Java classes. If you use Oracle's JDK, you get Oracle's implementation. If you use IBM's JDK, you'll get IBM's implementation.

[Mandar Khire]

Thanks Jesper de Jong,
Now i understand about h files.
Question remains

There are lots of c & cpp & h files,i confuse about which IDE should use for those like eclipse or netbean for java!

main aim of asking that as we write small java program for create frame & in that one button. & then we debug using netbean or eclipse...it shows how program flows from intenal files...
so if we use openjdk might be, if we declare frame then it use some c/c++ & h files..
So is there any IDE which show flow of program which combination of java,c,c++, many other files?
then it easy to understand...step by step...