1.       Kelas “Mahasiswa.java”

/*

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 */

package mahasiswa;

/**

 *

 * @author Fajar

 */

public class Mahasiswa {

    //variable instan  

    String nama;

   

    //methode

    void isiNama(String nama)   {

        this.nama=nama;

    }

    //methode

    String tampilkanNama(){

        return this.nama;

    }

    public static void main(String[] args) {

        // TODO code application logic here

    }

   

}

1.       Kelas “PenentuAkses.java

/*

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 */

package mahasiswa;

/**

 *

 * @author Fajar

 */

public class PenentuAkses {

    public static void main (String [] args){

        Mahasiswa saya = new Mahasiswa();

        //Mengisi variable instan

        saya.isiNama("Hariyadi Faja Nugroho");

        //Menampilkan nama melalui variable

        System.out.println(saya.nama);

        //menampilkan nama melalui pemanggilan methode

        System.out.println(saya.tampilkanNama());

    }

   

}

1.    Kelas Lingkaran.java

/*

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 */

package mahasiswa;

/**

 *

 * @author Fajar

 */

public class Lingkaran {

    private double radius;

    String ambilPhi;

   

    //methode

    void isiJariJari(double radius){

        this.radius = radius;

    }

   

    private double ambilPhi(){

        return 3.14;

    }

   

    public double hitungKeliling(){

        return 2*ambilPhi()*radius;

    }

}

   

}

1.    Kelas PenentuAksesMethod

/*

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 * and open the template in the editor.

 */

package mahasiswa;

/**

 *

 * @author Fajar

 */

public class PenentuAksesMethod {

    public static void main (String [] args){

       

        Lingkaran bulatan = new Lingkaran();

       

        //mengisi jari-jari lingkaran

        bulatan.isiJariJari(10);

       

        //menampilkan keliling lingkaran

        System.out.println("Keliling = "+bulatan.hitungKeliling());

       

        //menampilkan nilai Phi

        System.out.println("nilai Phi = "+bulatan.ambilPhi);

    }

   

}