Creating the instance of abstract class or anonymous class

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You create an anonymous class that extends your abstract class.

In the snipped below, you are extending AbstractDemo and provide implementations for its abstract methods.

new AbstractDemo() {
    @Override
    void showMessage() {
        // TODO Auto-generated method stub
    }

    @Override
    int add(int x, int y) {
        // TODO Auto-generated method stub
        return 0;
    }
};

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