package simple;
import java.io.File; 
import java.io.IOException; 
import java.util.Enumeration; 
import java.util.Properties; 
import java.util.logging.Level; 
import java.util.logging.Logger;

/ * @author user / 
public class Main {

public Main() {
    try {
        File file = new File("/home/user/NetBeansProjects/Simple/Hello.java");
        Runtime runtime = Runtime.getRuntime();

        if (!file.exists()) {
            file.createNewFile();
        }

        System.out.println("--before--");

        Process process = runtime.exec("notepad " + file.getAbsolutePath());
        int waitFor = process.waitFor();
        if (waitFor != 0) {
            throw new Exception("");
        }

        System.out.println("--after--");

    } catch (InterruptedException ex) {
        Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
    } catch (IOException ex) {
        Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
    } catch (Exception ex) {
        Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
    }       
}

public static void main(String[] args) {
    Main main = new Main();
}
}

Process process = runtime.exec("gedit " + file.getAbsolutePath());