[hardwired]

Code:

class Pseudo {
    // member variables
    // declared in class scope - visible everywhere
    ...

    void inSomeMethod() {
        String the_dir = "c:/test";
        postData(the_dir);
    }

    private void postData(String filePath) {
        // This method has access to the local variables
        // passed in as arguments as well as the member
        // variables declared in this enclosing class.
        File folder = new File(filePath);
        File[] files = folder.listFiles();
        for(int j = 0; j < files.length; j++)
            System.out.printf("files[%d] = %s%n", j, files[j].getName());
    }
}

For more information see Defining Methods.