Get list of processes on Windows in a charset-safe way

Question

This post gives a solution to retrieve the list of running processes under Windows. In essence it does:

String cmd = System.getenv(\"windir\") + \"\\\\system         


        

Answer 1

Why not use the Windows API via JNA, instead of spawning processes? Like this:

import com.sun.jna.platform.win32.Kernel32;
import com.sun.jna.platform.win32.Tlhelp32;
import com.sun.jna.platform.win32.WinDef;
import com.sun.jna.platform.win32.WinNT;
import com.sun.jna.win32.W32APIOptions;
import com.sun.jna.Native; 

public class ListProcesses {
    public static void main(String[] args) {
        Kernel32 kernel32 = (Kernel32) Native.loadLibrary(Kernel32.class, W32APIOptions.UNICODE_OPTIONS);
        Tlhelp32.PROCESSENTRY32.ByReference processEntry = new Tlhelp32.PROCESSENTRY32.ByReference();          

        WinNT.HANDLE snapshot = kernel32.CreateToolhelp32Snapshot(Tlhelp32.TH32CS_SNAPPROCESS, new WinDef.DWORD(0));
        try  {
            while (kernel32.Process32Next(snapshot, processEntry)) {             
                System.out.println(processEntry.th32ProcessID + "\t" + Native.toString(processEntry.szExeFile));
            }
        }
        finally {
            kernel32.CloseHandle(snapshot);
        }
    } 
}

I posted a similar answer elsewhere.