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+/**%0A * @author agaust%0A * @blog bloggersmart.net - python.web.id%0A */%0Apublic class Lingkaran %7B%0A    private double radius;%0A    %0A    //methode%0A    void isiJariJari(double radius) %7B%0A        this.radius = radius;%0A    %7D%0A    %0A    //private dan public conditional%0A    //private double ambilPhi()%7B%0A    public double ambilPhi()%7B%0A        return 3.14;%0A    %7D%0A    public double hitungKeliling() %7B%0A        return 2*ambilPhi() * radius;%0A    %7D%0A%7D%0A

Create Lingkaran.java