if -jar, use the jar name since no classname will be specified

bindings/java/src/net/hyperic/sigar/cmd/Ps.java

@@ -138,13 +138,16 @@ public class Ps extends SigarCommandBase {
                 String[] args = sigar.getProcArgs(pid);
                 for (int i=1; i<args.length; i++) {
                     String arg = args[i];
-                    if (!isClassName(arg)) {
-                        continue;
-                    }
+                    if (isClassName(arg)) {
                         //example: "java:weblogic.Server"
                         name += ":" + arg;
                         break;
                     }
+                    else if (arg.equals("-jar")) {
+                        name += ":" + args[i+1];
+                        break;
+                    }
+                }
 
             } catch (SigarException e) {}
         }