Introduction
The aim of “Java Decompiler” project is to develop tools to decompile and analyze Java 5, and upper, “.class” files.
Some facts:
* The final release of JSR 176, defining the major features of the J2SE 5.0, has been published the september 30, 2004.
* The lastest Java version supported [...]

Acrobat has the feature to remove XMP, and you have to remove nodes one by one, with my Batch XMP Remover, you can remove all XMP data of the PDF files from the given folder with the help of Acrobat API.
I will release this product recently.
P.S.

Adobe’s Extensible Metadata Platform (XMP) is a labeling technology that [...]

After some modification, I compiled pdftk to Dynamic link library Version, pdftk.dll, and wote a delphi example to show how to use this DLL, here is the delphi example,

program pas;
{$APPTYPE CONSOLE}
//uses
// SysUtils;
function Convert(argc : integer; argv : Array of string): Integer; stdcall; external ‘pdftk.dll’ name ‘_Z7ConvertiPPc@8′;
var s: Array of string;
i,size:Integer;
begin
size :=System.ParamCount;
SetLength(s,size);
for i:=0 to [...]