Implement two interfaces in an anonymous class

Question

I have two interfaces:

interface A {
    void foo();
}

interface B {
    void bar();
}

I am able to create anonymous instances of classes impl

Answer 1

Note that you can make a named local class that implements the two interfaces:

void method() {
    class Aggregate implements A, B {
        void foo() {}
        void bar() {}
    }

    A a = new Aggregate();
    B b = new Aggregate();
}

This save you from doing a class-level or top-level class declaration.

The result is called a local class. Local classes declared in instance methods are also inner classes, which means that they can reference the containing object instance.