Main :

 public class Main  
 {  
   public static void Main()  
   {  
     Persegi myPersegi = new Persegi();   
     myPersegi.s = 10;  
     System.out.println("Luas Permukaan : "+myPersegi.luasPermukaan());  
     System.out.println("Keliling : "+myPersegi.keliling());  
     System.out.println("");  
     PersegiP myPersegiP = new PersegiP();  
     myPersegiP.p = 10;myPersegiP.l = 5;  
     System.out.println("Persegi Panjang");  
     System.out.println("Luas Permukaan : "+myPersegiP.luasPermukaan());  
     System.out.println("Keliling : "+myPersegiP.keliling());  
     System.out.println("");  
     Lingkaran myLingkaran = new Lingkaran();  
     myLingkaran.r = 10;  
     System.out.println("Lingkaran");  
     System.out.println("Luas Permukaan : "+myLingkaran.luasPermukaan());  
     System.out.println("Keliling : "+myLingkaran.keliling());  
     System.out.println("");  
     Segitiga mySegitiga = new Segitiga();  
     mySegitiga.a = 7;mySegitiga.t = 5;  
     System.out.println("Segitiga");  
     System.out.println("Luas Permukaan : "+mySegitiga.luasPermukaan());  
     System.out.println("Keliling : "+mySegitiga.keliling());  
     System.out.println("");  
     Jargen myJargen = new Jargen();  
     myJargen.a = 10;myJargen.t = 3;myJargen.b = 5;  
     System.out.println("Jajar Genjang");  
     System.out.println("Luas Permukaan : "+myJargen.luasPermukaan());  
     System.out.println("Keliling : "+myJargen.keliling());  
     System.out.println("");  
     Ketupat myKetupat = new Ketupat();  
     myKetupat.d1 = 7;myKetupat.d2 = 5;myKetupat.t = 10;  
     System.out.println("Belah Ketupat");  
     System.out.println("Luas Permukaan : "+myKetupat.luasPermukaan());  
     System.out.println("Keliling : "+myKetupat.keliling());  
     System.out.println("");  
   }       
 }  

Persegi :

 public class Persegi  
 {  
   public double s;   
   public double luasPermukaan()   
   {   
    return s * s;   
   }   
   public double keliling()   
   {   
    return 4 * s;    
   }   
 }  

Persegi Panjang :

  public class PersegiP   
  {   
   public double p;  
   public double l;  
   public double luasPermukaan()   
   {   
    return p * l;   
   }   
   public double keliling()   
   {   
    return 2 * (p + l);    
   }   
  }  

Lingkaran :

  public class Lingkaran   
  {   
   public double r;   
   public double luasPermukaan()   
   {   
    return 3.14 * r * r;   
   }   
   public double keliling()   
   {   
    return 2 * 3.14 * r;    
   }   
  }  

Segitiga :

  public class Segitiga   
  {   
   public double a;   
   public double t;   
   public double luasPermukaan()   
   {   
    return (a * t)/ 2;   
   }   
   public double keliling()   
   {   
    return 3 * a;    
   }   
  }   

Jajar Genjang :

  public class Jargen   
  {   
   public double a;   
   public double t;   
   public double b;   
   public double luasPermukaan()   
   {   
    return a*t;   
   }   
   public double keliling()   
   {   
    return (2*a)+(2*b);    
   }   
  }   

Belah Ketupat :

 public class Ketupat   
  {   
   public double d1;   
   public double d2;   
   public double t;   
   public double luasPermukaan()   
   {   
    return (d1*d2)/2;   
   }   
   public double keliling()   
   {   
    return 4 * t;    
   }   
  }   

Output: