dynamically create a file & load it using Class.forName()

[Vincent Goh]

I'm trying to dynamically create a file in the source directory. Then load the newly created code file using Class.forName();

The problem: when the file gets created, i wasn't able to see it until I do a refresh on the project. Which means that I have to relaunch the program in order to access the code file created. That's bad!
Is there a way to create the code file then access it using Class.forName() without relaunching the program?
Feel free to try out the code below.

thanks,
vincent

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   public static void main(String[] args) throws IOException {
       FileOutputStream fout;
       PrintStream prints;
       File file = new File("src\\ok.java");
       if (!file.exists()) {
           fout = new FileOutputStream(file);
           prints = new PrintStream(fout);
           prints.println("public class ok {}");
           fout.close();
           System.out.println("Created code file: " + file.getAbsolutePath());
       }
       try {
           Class clas = Class.forName("ok");
           System.out.println(clas.getName());
       } catch (ClassNotFoundException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
   }
 

[Ulf Dittmer]

Aren't you missing the step where you are compiling the source file? Class.forName can only load class file, not source files. Your IDE probably compiles it when you run the program, but that is not a function of Java itself. In you want to create new classes with a running program, you need to compile them explicitly.