[Eku]

WAW thanks a lot. I really appreciate it. =)
I just used the command line in Compiling. Here is the Command i used. i just cut it from the main code. I just invoke the Javac and java commands. One more problem is how do i Handle those errors in compiling. I will read the compilerClass, thanks for informing that, Im still have lots to learn about java. =)

Code:

else if (command.equals("Build")) {
            try
            {   File filename2 = new File(filename.getAbsolutePath().substring(0,filename.getAbsolutePath().lastIndexOf(".")));
                
                String s ="javac -cp \""+ filename2.getAbsolutePath().substring(0, filename2.getAbsolutePath().lastIndexOf("\\"))+"\" \""+ filename2.getAbsolutePath() +".java\"";
                Runtime.getRuntime().exec(s);
                JOptionPane.showMessageDialog(this,"Building Succesful");
            }
            catch (Exception ex){ System.err.println(ex);
            JOptionPane.showMessageDialog(this,"Building Error");}
        }
        else if (command.equals("Run")) {
            try
            {   File filename3 = new File(filename.getAbsolutePath().substring(0,filename.getAbsolutePath().lastIndexOf(".")));
                String s ="cmd.exe /k start java -cp \""+ filename3.getAbsolutePath().substring(0, filename3.getAbsolutePath().lastIndexOf("\\"))
                        + "\" "+ filename.getName().substring(0,filename.getName().lastIndexOf("."));
                Process process = Runtime.getRuntime().exec(s);
                BufferedReader stdout = new BufferedReader(new InputStreamReader(process.getInputStream()));
                JOptionPane.showMessageDialog(this,"Run Succesful");
            }
            catch (Exception ex){ System.err.println(ex);
            JOptionPane.showMessageDialog(this,"Run Time Error");}
        }else if (command.equals("Open Command Line")) {
            try
            {  Runtime.getRuntime().exec("cmd.exe /k start cd \\");}
            catch (Exception ex){ System.err.println(ex);
            JOptionPane.showMessageDialog(this,"Run Time Error");}
        }