[JaCod]

some time now I'm confused how to make the Interpreter or execute the program after the compilation process.
The following piece of program for the compilation process

public void actionPerformed(ActionEvent e) {
            try {
            input=txinput.getText();
            txresult.append(input);
            FileWriter save=new FileWriter(new File("file.java"));
            save.write(input);
            save.close();

            Process pid = Runtime.getRuntime().exec("file.java");
	    BufferedReader in = new BufferedReader(new InputStreamReader(pid.getErrorStream()));

            String hasil;
	    txresult.setText("Result:\n");
	    while((result=in.readLine())!=null) {
	    txresult.append(hasil);
	    txresult.append(System.getProperty("line.separator"));
	}
	if ((result=in.readLine())==null) {
	txresult.append("Source success compiled");
	}
	in.close();

           }
            catch(IOException eu){
             JOptionPane.showMessageDialog(null,eu);
}
}
});

From the plot above, after saving a file in the development of the extension. Java, then it will be the compilation. Incidentally, I wonder how to make the process of Interpreter or execution entered in the code.

Here's how if we want to compile

javac (then the name of java file which will be compiled)

From here I do not understand, what if the Interpreter or the execution of the program?

This post has been edited by JaCod: 11 November 2010 - 08:16 PM

[bcranger]

There is no way to compile your present code...all code must be in classes, you cannot just slap some code down and expect it to run.

public class Test
{
  public Test()
  {}
  // runner method must have a main method
  public static void main(String[] args)
  {}
}

[macosxnerd101]

In order to run the code your IDE saves, it needs to use the Process class to compile the code by calling javac. The following commands should be executed by your Process objects:

javac FileName.java //compiles the file
java FileName //runs the file

@bcranger: His project is to make a simple Java IDE.

[JaCod]

macosxnerd101, on 11 November 2010 - 08:59 PM, said:

In order to run the code your IDE saves, it needs to use the Process class to compile the code by calling javac. The following commands should be executed by your Process objects:

javac FileName.java //compiles the file
java FileName //runs the file

@bcranger: His project is to make a simple Java IDE.

in my code correct

Process pid = Runtime.getRuntime().exec("javac file.java");

code generates a compilation of results, if correct will appear "Source compiled success" and if one will display an error message.

I mean if I change

Process pid = Runtime.getRuntime().exec("java file");

will appear an error in execution. is there any advice on how to enter code execution?