Java Programming Inheritance Geometri with extends class Circle, Rectangel, Triangel

 //class Geometri

package tugasapbo;


public class Geometri {
 
    protected double alas;
    protected double phi;
    protected double r;
    protected double tinggi;
    protected int sisi;
   
    public Geometri() {
    }

    public Geometri(double alas, double phi, double r, int sisi, double tinggi) {
 
        this.alas = alas;
        this.phi = phi;
        this.jarijari = r;
        this.tinggi = tinggi;
        this.sisi = sisi;
    }

  
    public double getAlas() {
        return alas;
    }

    public void setAlas(double alas) {
        this.alas = alas;
    }

    public double getPhi() {
        return phi;
    }

    public void setPhi(double phi) {
        this.phi = phi;
    }

    public double getR() {
        return r;
    }

    public void setR(double r) {
        this.r = r;
    }

    public double getTinggi() {
        return tinggi;
    }

    public void setTinggi(double tinggi) {
        this.tinggi = tinggi;
    }

    public int getSisi() {
        return sisi;
    }
   
    public void setSisi(int sisi) {
        this.sisi = sisi;
    }
   
}

//class Circle
package tugasapbo;

public class Circle extends Geometri{
   
    private double LuasC;
    private double KelilingC;
   
    public Circle() {
    }

    public Circle(double LuasC) {
        this.LuasC = LuasC;
       
        super.phi = phi;
        super.r = r;
       
    }

    public double getLuasC() {
        return LuasC=phi*r*r;
       
    }

    public double getKelilingC() {
        return KelilingC= 2*phi*r;
    }
   
}




//class Rectangel
package tugasapbo;

public class Rectangel extends Geometri{
    private int luas;
    private int kelilingR;
   
    public Rectangel() {}

    public Rectangel(int luas, int kelilingR) {
        this.luas = luas;
        this.kelilingR = kelilingR;
        super.sisi    = sisi;
       
       
    }
   
    public int getLuas() {
        return luas = sisi*sisi;
    }

    public int getKelilingR() {
        return kelilingR = 4*sisi;
    }  
}


//class Triangel
package tugasapbo;

public class Triangel extends Geometri {
   
    private double luasT;
 
   
    public Triangel() {
    }

    public Triangel(double luasT) {
        this.luasT = luasT;
       
        super.alas = alas;
        super.tinggi = tinggi;
       
    }

    public double getLuasT() {
        return luasT= 1.5*alas*tinggi;
       
    }
   
}


// main function
package tugasapbo;

import java.util.Scanner;


public class TugasApbo {

   
    public static void main(String[] args) {
       
        Rectangel A= new Rectangel();
        Scanner input= new Scanner(System.in);

        System.out.println("                TUGAS KULIAH APBO                ");

        System.out.println("Masukkan Sisi    :");
        A.setSisi(input.nextInt());

        System.out.println("Keliling Rectangel = "+A.getKelilingR());
        System.out.println("Luas Rectangel     = "+A.getLuas());
        System.out.println("<<<===============================>>>");
       
        Triangel B= new Triangel();
        Scanner input2= new Scanner(System.in);

        System.out.println("Masukkan Alasnya   :");
        B.setAlas(input2.nextDouble());

        System.out.println("Masukkan Tingginya :");
        B.setTinggi(input2.nextDouble());

        System.out.println("Luas Triangel = "+B.getLuasT());
        System.out.println("<<<===============================>>>");
       
        Circle C= new Circle();
        Scanner input3= new Scanner(System.in);
        C.setPhi(3.14);

        System.out.println("Masukkan Jari-jarinya :");
        C.setJarijari(input3.nextDouble());
       
        System.out.println("Luas Lingkarannya     :"+C.getLuasC());
        System.out.println("Keliling Lingkarannya :"+C.getKelilingC());
        System.out.println("<<<===============================>>>");
    }
}


Output :