how to find the hardware ID like, Harddisk serial number, processor serial number, motherboard serial number, etc. in java?

Unfortunately, that's not possible in pure Java. You can look into JNI, though.

__________________
ASCII a question .. Get an ANSI

Please surround your code with [highlight=Java]code goes here[/highlight].

Not sure but SIGAR might offer something.

Sigar API

// Json

i will be helpful if i have code snippet.coz i am new to java. thank u in advance.

I wouldn't recommend doing JNI stuff if you are new to Java, unless you are coming from a C/C++ background.

// Json

It's my standard answer to anything that can't be done in pure Java. Why do you want to know the serial number of your harddisk and such? It's much easier to try and find that on the hardware itself (particularly the mother board).

__________________
ASCII a question .. Get an ANSI

Please surround your code with [highlight=Java]code goes here[/highlight].

actually i am doing a project to attach hardware IDs with email. so that we can easily track the email. it will have uses in some other fields also.

How many of these things do you have to look up? It may be easier to manually look them up and store those codes with some key-file on your computer (say like putting a serials.cfg file somewhere on that computer). This way, your program only will have to handle file reading, a much easier task.

FYI: I think that windows machines generate their own serial codes for hard disks that may or may not be the same as the manufacturer's serial codes. This is because of the way window's drivers work, and each partition of a single hard-drive produces a separate serial code.

__________________
ASCII a question .. Get an ANSI

Please surround your code with [highlight=Java]code goes here[/highlight].