Formate of an exe generated by the java application

I want to read an .exe file generated by a java application through C++ but i don't know the formate of that file. when i open the file in text editor i can't see anything but the symbols.
Can anyone out there tell me what will be the file formate of .exe generated by java application or any other way out

Let me tell u some functionality of this application as i only have the jar file of this project.
It is a graphical application just like MS Paint but it only draw text with different colors, change background color etc.
i also generate some code of this project through a tool which convert .jar file to java code.
As i don't know much about java so i can't able to understand completely this code.
I am copying the code of action lister of open file menu....
if (e.getSource() == openMenuItem) {
          ExampleFileFilter ssfFilter
          = new ExampleFileFilter("ssf", "Sedao Scene Format");
          chooser.setFileFilter(ssfFilter);
          if (System.getProperty("PROPERTY_APPLICATION_KEY")
          == "qc2.jar") {
          if (getApplicationMode() == 0) {
               if (System.getProperty("PROPERTY_LAST_SCENE_DIR")
               != null)
               chooser.setCurrentDirectory
                    (new File(System.getProperty
                         ("PROPERTY_LAST_SCENE_DIR")));
               if (chooser.showOpenDialog(this) == 0)
               open(chooser.getSelectedFile(), false);
          } else if (!((SchedulePanel) schedulePanel).openSchedule())
               JOptionPane.showMessageDialog
               (this,
               "There was an error loading the schedule file. please check it is a valid schedule file.",
               "Error Loding Schedule", 0);
          } else if (System.getProperty("PROPERTY_APPLICATION_KEY")
               == "Overlay.jar") {
          if (getApplicationMode() == 0) {
               int returnVal = chooser.showOpenDialog(this);
               if (returnVal == 0)
               open(chooser.getSelectedFile(), false);
          } else if (getApplicationMode() == 1) {
               boolean result
               = ((SmartScheduleDesigner) schedulePanel)
                    .openSchedule();
               if (!result)
               JOptionPane.showMessageDialog
                    (this,
                    "There was an error loading the schedule file. please check it is a valid schedule file.",
                    "Error Loding Schedule", 0);
          chooser.removeChoosableFileFilter(ssfFilter);
     }

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