Tugas PBO-2

MyMain

 public class MyMain  
 {  
   public static void main()  
   {  
   circle acircle; // creating reference  
   acircle = new circle(); // creating object  
   acircle.x = 10; // assigning value to data field  
   acircle.y = 20;  
   acircle.r = 5;  
   double area = acircle.area(); // invoking method  
   double circumf = acircle.circumference();  
   System.out.println("--Circle--");  
   System.out.println("Radius="+acircle.r+"Area="+area);  
   System.out.println("Radius="+acircle.r+" Circumference ="+circumf);  
   square asquare; // creating reference  
   asquare = new square(); // creating object  
   asquare.s = 20; // assigning value to data field  
   double luas = asquare.area(); // invoking method  
   double keliling = asquare.circumference();  
   System.out.println("--Square--");  
   System.out.println("Sisi="+asquare.s+"Area="+luas);  
   System.out.println("Sisi="+asquare.s+" Circumference ="+keliling);  
   rectangle arectangle; // creating reference  
   arectangle = new rectangle(); // creating object  
   arectangle.p = 20; // assigning value to data field  
   arectangle.l = 10;  
   double Luas = arectangle.area(); // invoking method  
   double Keliling = arectangle.circumference();  
   System.out.println("--Rectangle--");  
   System.out.println("Area="+luas);  
   System.out.println("Circumference ="+keliling);  
   triangle atriangle; // creating reference  
   atriangle = new triangle(); // creating object  
   atriangle.a = 20; // assigning value to data field  
   atriangle.b = 20;  
   atriangle.c = 20;  
   double Area = atriangle.area(); // invoking method  
   double Circumference = atriangle.circumference();  
   System.out.println("--Triangle--");  
   System.out.println("Area="+Area);  
   System.out.println("Circumference ="+Circumference);  
   belahketupat abelahketupat; // creating reference  
   abelahketupat = new belahketupat(); // creating object  
   abelahketupat.d1 = 20; // assigning value to data field  
   abelahketupat.d2 = 20;  
   Area = abelahketupat.area(); // invoking method  
   Circumference = abelahketupat.circumference();  
   System.out.println("--Belah Ketupat--");  
   System.out.println("Area="+Area);  
   System.out.println("Circumference ="+Circumference);  
   jajargenjang ajajargenjang; // creating reference  
   ajajargenjang = new jajargenjang(); // creating object  
   ajajargenjang.a = 20; // assigning value to data field  
   ajajargenjang.b = 40;  
   ajajargenjang.t = 50;  
   Area = ajajargenjang.area(); // invoking method  
   Circumference = ajajargenjang.circumference();  
   System.out.println("--Jajaran Genjang--");  
   System.out.println("Area="+Area);  
   System.out.println("Circumference ="+Circumference);  
   }  
 }  

Circle

 /**  
  * Write a description of class circle here.  
  *  
  * @author (your name)  
  * @version (a version number or a date)  
  */  
 public class circle  
 {  
   public double x,y; // centre coordinate  
   public double r ; // radius of the circle  
   //Methods to return circumference and area   
   public double circumference(){  
         return 2*3.14*r;  
   }  
   public double area(){  
         return 3.14*r*r;  
   }  
 }  

Square

 /**  
  * Write a description of class segitiga here.  
  *  
  * @author (your name)  
  * @version (a version number or a date)  
  */  
 public class square  
 {  
   public double s;  
   public double circumference(){  
     return 4*s;  
   }  
   public double area(){  
     return s*s;  
   }  
 }  

Rectangle

 /**  
  * Write a description of class segitiga here.  
  *  
  * @author (your name)  
  * @version (a version number or a date)  
  */  
 public class square  
 {  
   public double s;  
   public double circumference(){  
     return 4*s;  
   }  
   public double area(){  
     return s*s;  
   }  
 }  

Triangle

 /**  
  * Write a description of class triangle here.  
  *  
  * @author (your name)  
  * @version (a version number or a date)  
  */  
 public class triangle  
 {  
   public double a,b,c,d;  
   public double circumference(){  
     return a+b+c;  
   }  
   public double d(){  
     return circumference()/2;  
   }  
   public double area(){  
     return Math.sqrt(d()*(d()-a)*(d()-b)*(d()-c));  
   }  
 }  

Belah Ketupat

 /**  
  * Write a description of class belahketupat here.  
  *  
  * @author (your name)  
  * @version (a version number or a date)  
  */  
 public class belahketupat  
 {  
   public double d1,d2;  
   public double s(){  
     return Math.sqrt((d1/2)*(d1/2) + (d2/2)*(d2/2));  
   }  
   public double circumference(){  
     return 4*s();  
   }  
   public double area(){  
     return 0.5*d1*d2;  
   }   
 }  

Jajar Genjang

 /**  
  * Write a description of class belahketupat here.  
  *  
  * @author (your name)  
  * @version (a version number or a date)  
  */  
 public class belahketupat  
 {  
   public double d1,d2;  
   public double s(){  
     return Math.sqrt((d1/2)*(d1/2) + (d2/2)*(d2/2));  
   }  
   public double circumference(){  
     return 4*s();  
   }  
   public double area(){  
     return 0.5*d1*d2;  
   }   
 }  

Gambar