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Abstract

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Abstract


 
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Abstract

    - Classes
    • can’t be instantiated
    - Methods
    • can’t have any implementation
    • need implementation from their children

    abstract class Shape {
    protected int edges_num;
    abstract void draw();
    }
    class Star extends Shape{
    Star(int _edges) {
    edges_num = _edges;
    }
    public void draw() {}
    }

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