Java reference outer Class scope in callback

Question

In class Foo, I'm performing an HTTP post, returning to a callback:

class Foo {

    private static void send() {

        HttpPostRequest task = new HttpPostRequest(data, new HttpPostRequest.CustomCallback() {
            @Override
            public void completionHandler(Boolean success, String result) {

                // this doesn't work
                // this.anotherMethod();
            }
        });
        task.execute("https://foo.org");
    }

    private static void anotherMethod() {
      // i need to do things here...
    }

}

This callback works, however I need to call another method in the outer class scope. I can't figure out how to do this: How do I properly reference this outer scope?

Nir Alfasi · Accepted Answer · 2017-11-17 00:15:48Z

1

When both methods are static you can simply call:

Foo.anotherMethod()

if both are not static, you can do:

Foo.this.anotherMethod()

answered Nov 17, 2017 at 0:15

Nir Alfasi

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2 Comments

dthree Over a year ago

Will this also reference instance variables? Such as this.myVariable in the outer class instance?

Nir Alfasi Over a year ago

@dthree that's the second option I mentioned (which is feasible only if both methods are not static). When a method is static it does not refer to any instance since it's a class-method not an instance-method.

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