fill a file inside a inner class

Question

I'm quiet new to java and I'm not even sure if the title makes any sense. Anyway how do I gain access to a file inside of onStatus? I'm just trying to write into a file in that function so in the code below "T_file.length()" the "T_file" cannot be resolved.

public static void main (){
    foo("file_name");
}

foo(String fileName)
{
        try{
        final File T_file = new File (fileName);
        final FileWriter fw = new FileWriter(fileName);
        final BufferedWriter bw = new BufferedWriter (fw);
        }catch (IOException e){}

        StatusListener listener = new StatusListener(){     
        public void onStatus(Status status){
            if (T_file.length() > 100){
                    System.out.println ("I have access here");
                  }
            }
        }

}

Answer 1

"T_file.length()" the "T_file" cannot be resolved

This is because T_file is not in the scope of onStatus. You declare T_file in the foo method, but then create a new StatusListener in which you redefine the onStatus, but the compiler still see StatusListener as an other class.

A workaround would be to declare the variable globally in your class, then access it specifying the name of your Class.this.T_file. Here an example :

public class Foo {

    File T_file;

    public static void main (){
        new Foo("file_name");
    }

    Foo(String fileName)
    {

        T_file = new File (fileName);        

        StatusListener listener = new StatusListener(){     
            public void onStatus(Status status){
                if (Foo.this.T_file.length() > 100){
                    System.out.println ("I have access here");
                  }
            }
        };
    }
}

This example would compile.

Notice that I added a ; at the end of the StatusListener, else it would not compile.