How can an anonymous class have arguments?

Question

I\'m not a java guy but I\'ve inherited some code I need to patch up. I pulled the source into netbeans and I\'m getting the error: Anonymous class implements interface; cannot

Answer 1

@Victor is right that you can create another class. You can also use variables inside an anonymous class that are final. Something like the following will work.

Executor background = Executors.newSingleThreadExecutor();
private final FilePath filePath = ...;
private final String searchIndex = ...;
Runnable mylookupThread = new Runnable() {
    public void run() {
        MainWindow.this.processFile(filePath);
        Thread t = new Thread(new lookupThread(MainWindow.arrFile, true, false,
           searchIndex));
        t.setName("Lookup");
        t.setPriority(10);
        t.start();
    }
};

Btw. It's a little strange to create a thread inside the Runnable of a thread executing in an executor. Not sure why you wouldn't just spawn the LookupThread directly and remove the anonymous class altogether.