java MaClasse param1 param2 ... paramN

public static void main (String[] args) {  ... }

// nombre de paramètres 
int nbParam = args.length; 
for (int i = 0; i < nbParam; i++) { 
    System.out.println(args[i]); 
}

Manifest-Version: 1.0 
Created-By: 1.4.1_01 (Sun Microsystems Inc.) 
Main-Class: Start 
Class-Path: .\archive1.jar .\archive2.jar

Class-Path: path1\archive1.jar path2\archive2.jar

jar cvfm monappli.jar META-INF/MANIFEST.MF .

java -classpath ".;./archive1.jar;./archive2.jar" -jar monappli.jar

java -classpath ".;path1/archive1.jar;path2/archive2.jar" -jar monappli.jar

Throwable t = new Throwable(); 
StringWriter sw = new StringWriter(); 
t.printStackTrace(new PrintWriter(sw, true)); 
String stackTrace = sw.toString();

Throwable t = new Throwable(); 
StackTraceElement traces[] = t.getStackTrace();

   private static int PORT = 12345; 
   public static void main(String[] args) { 
      try { 
         new ServerSocket(PORT); 
         System.out.println("Instance du programme unique"); 
      }catch(Exception e){ 
         System.out.println("Il y a deja une instance du programme active"); 
         System.exit(0); 
      } 
}