class FileCompileAction extends AbstractAction {
        public FileCompileAction() {
            super("Compile");
        }
          
        public void actionPerformed(ActionEvent e) {

            String cmd1 = "Javac";
            String cmd2 = "";
            String fName = "Main.java";
            File dir = new File("D:\");

            String[] cmdarray = {cmd1, cmd2, fName};
            String[] env = {};

            try {
                Process p = Runtime.getRuntime().exec(cmdarray, env, dir);
                BufferedInputStream err = new BufferedInputStream(p.getErrorStream());
                BufferedInputStream out = new BufferedInputStream(p.getInputStream());
                String cerr = "";
                String cout = "";
                Character c;
                int i = -1;
                while((i = err.read()) != -1) {
                    c = new Character((char)i);
                    cerr = cerr.concat(c.toString());
                }
                err.close();

                i = -1;
                while((i = out.read()) != -1) {
                    c = new Character((char)i);
                    cout = cout.concat(c.toString());
                }
                out.close();

                int stat = 0;
                try {
                    stat = p.waitFor();
                } catch (InterruptedException ie) {
                    ie.printStackTrace();
                }

                p.destroy();

                System.out.println("Ende mit: "+stat);
                System.out.println(cout);
                System.out.println(cerr);
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }
        }
    }