Menghitung Luas dan Keliling Bangun 2D

Berikut source code untuk menghitung beberapa bangun datar 2D.

- Segitiga

  public class Triangle   
  {   
   private double a;   
   private double t;   
   private String color;   
   public Triangle()   
   {   
    a = 1.0;   
    t = 1.0;   
    color = "white";   
   }   
   public Triangle(double alas)   
   {   
    a = alas;   
    t = 1.0;   
    color = "white";   
   }   
   public Triangle(double alas,String warna)   
   {   
    a = alas;   
    color = warna;   
   }   
   public Triangle(double alas,double tinggi,String warna)   
   {   
    a = alas;   
    t = tinggi;   
    color = warna;   
   }   
   public double getA()   
   {   
    return a;   
   }   
   public double getT()   
   {   
    return t;   
   }   
   public String getColor()   
   {   
    return color;   
   }   
   public double getArea()   
   {   
    return a*t/2;   
   }   
   public String toString()   
   {   
    return String.format("A %s colored triangle have an area of %f cm",this.getColor(),this.getArea());   
   }   
  }   

- Lingkaran

  import static java.lang.Math.*;   
  public class Circle   
  {   
   private double r;   
   private String color;   
   public Circle ()   
   {   
    r = 1.0;   
    color = "red";   
   }   
   public Circle (double jari)   
   {   
    r = jari;   
    color = "red";   
   }   
   public Circle ( double jari, String warna )   
   {   
    r = jari;   
    color = warna;   
   }   
   public double getArea(){   
    System.out.printf("Area of %s Circle is.. %f\n",color,PI * r * r);   
    return PI * r * r;   
   }   
   public double getRound()   
   {   
    System.out.printf("Around of %s Circle is.. %s\n",color,PI * 2 * r);   
    return PI * 2 * r;   
   }   
   public double getRadius()   
   {   
    return r;   
   }   
   public String getColor()   
   {   
    return color;   
   }   
   public String toString()   
   {   
    return String.format("A Circle with %s color has an area of %f cm",this.getColor(),this.getArea());   
   }   
  }   

-Segiempat

 public class Square   
  {   
   private double s;   
   private String color;   
   public Square()   
   {   
    s = 1.0;   
    color = "white";   
   }   
   public Square(double sisi)   
   {   
    s = sisi;   
    color = "white";   
   }   
   public Square(double sisi,String warna)   
   {   
    s = sisi;   
    color = warna;   
   }   
   public double getArea(){   
    return s * s;   
   }   
   public double getRound()   
   {   
    return 4 * s;   
   }   
   public double getSide()   
   {   
    return s;   
   }   
   public String getColor()   
   {   
    return color;   
   }   
   public String toString()   
   {   
    return String.format("The %s colored Square has an Area of %f cm",this.getColor(),this.getArea());   
   }   
  }   

- Persegi Panjang

  public class Rectangle   
  {   
   private double p;   
   private double l;   
   private String color;   
   public Rectangle()   
   {   
    p = 1.0; l = 1.0;   
    color = "white";   
   }   
   public Rectangle(double panjang,double lebar)   
   {   
    p = panjang;   
    l = lebar;   
    color = "white";   
   }   
   public Rectangle(double panjang,double lebar,String warna)   
   {   
    p = panjang;   
    l = lebar;   
    color = warna;   
   }   
   public double getP()   
   {   
    return p;   
   }   
   public double getL(){ return l; }   
   public String getColor() {return color; }   
   public double getArea ()   
   {   
    return p * l;   
   }   
   public double getRound()   
   {   
    return 2*(p+l);   
   }   
   public String toString()   
   {   
    return String.format("A %s colored rectangle with Lenght of %f and Widht of %f have an area of %f cm"   
    ,this.getColor(),this.getP(),this.getL(),this.getArea());   
   }   
  }   

main

 public class MainClass   
  {   
   public static void main()   
   {   
    Circle circle1 = new Circle(7.0,"Black");   
    Circle circle2 = new Circle(14.0);   
    Circle circle3 = new Circle();   
    System.out.println(circle1);   
    System.out.printf("A round of %f\n",circle1.getRound());   
    System.out.println(circle2);   
    System.out.printf("A round of %f\n",circle2.getRound());   
    System.out.println(circle3);   
    System.out.printf("A round of %f\n",circle3.getRound());   
    System.out.printf("\n\n");   
    System.out.printf("Now to test the Rectangle\n");   
    Rectangle persegi1 = new Rectangle(5,4);   
    Rectangle persegi2 = new Rectangle(5,3,"Merah");   
    Rectangle persegi3 = new Rectangle();   
    System.out.println(persegi1);   
    System.out.printf("A round of %f\n",persegi1.getRound());   
    System.out.println(persegi2);   
    System.out.printf("A round of %f\n",persegi2.getRound());   
    System.out.println(persegi3);   
    System.out.printf("A round of %f\n",persegi3.getRound());   
    System.out.printf("\n\n");   
    System.out.printf("Now to test the square\n");   
    Square kotak1 = new Square(10);   
    Square kotak2 = new Square(5,"hijau");   
    Square kotak3 = new Square();   
    System.out.println(kotak1);   
    System.out.printf("A round of %f\n",kotak1.getRound());   
    System.out.println(kotak2);   
    System.out.printf("A round of %f\n",kotak2.getRound());   
    System.out.println(kotak3);   
    System.out.printf("A round of %f\n",kotak3.getRound());   
    System.out.printf("\n\n");   
    System.out.printf("Now to test the triangle\n");   
    Triangle segitiga1 = new Triangle(2);   
    Triangle segitiga2 = new Triangle(6.0,3.0,"Kuning");   
    Triangle segitiga3 = new Triangle ( 10.0, "Kuning");   
    Triangle segitiga4 = new Triangle();   
    System.out.println(segitiga1);   
    System.out.println(segitiga2);   
    System.out.println(segitiga3);   
    System.out.println(segitiga4);   
    System.out.printf("\n\n");   
   }   
  }  

Anda baru saja membaca artikel yang berkategori PBO dengan judul Menghitung Luas dan Keliling Bangun 2D. Jika kamu suka, jangan lupa like dan bagikan keteman-temanmu ya... By : Faruqi's Blog

Ditulis oleh: Etri - Sabtu, 01 April 2017