How to run a Jar executable with non standard JVM memory settings

Question

Hi,
I have a jar-executable that needs more memory than the JVM uses by default.
The application works with:
java -Xms128M -Xmx256M myapp
How can the jar know that it need to start like this?
I found a solution here http://forum.java.sun.com/thread.jsp?forum=32&thread=188484 , but i don't want to do this with a shortcut.
Is there anyway to do this?
Thanx in advance.

Answer 1

Well i'll do that:
public class launch
  public static String getJarPath()
    String path="";
    try
      StringTokenizer st = new StringTokenizer(System.getProperty( "java.class.path" ) ,System.getProperty( "path.separator" ) );
      String jarfile = "";
      while ( st.hasMoreTokens() )
        String token = st.nextToken();
        if ( token.indexOf("launch.jar") > -1 )
           jarfile = token;
           break;
      if ( jarfile.equals("") ) throw new Exception( "Jar not found in classpath" );
      path = jarfile.substring( 0 , jarfile.indexOf("launch.jar"));
   catch (Exception e)
    new AlertWin(e.toString());
   finally
    return path;
  public static void main(String[] args)
    try
      String path=launch.getJarPath();
      Runtime.getRuntime().exec("javaw -Xms128M -Xmx256M -jar " + path + "toBeExecuted.jar");
    catch(IOException e)
      new AlertWin(e.toString());
}The launch.jar has to be in the same dir with the toBeExecuted.jar. (ofcourse that could change and the code is much simpler).