Question

m The interface Measurable is defined as the following: /** An interface for methods that return the perimeter and area of an object. */ public interface Measurable { public double getPerimeter(); public double getArea(); } The class Rectangle implements the interface. The incomplete program is written as follows: 1 public class Rectangle 2 { private double width; private double height; public Rectangle(double w, double h) { width = w; height h; } { 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29) public void setWidth(double w) width - W } public void setHeight(double h) (L height = h; } public double getwidth() return width; { public double getHeight() { return height; } //more wethods 1. Find any syntax error in the existing code by pointing out the line number and write down the

Answer 1

Note: Could you plz go through this code and let me know if u need any changes in this.Thank You
=================================

// Measurable.java

public interface Measurable {
double getPerimeter();
double getArea();
}

================================

// Line No 1 : We have to write the implements interface name in Rectangle class

// Rectangle.java

public class Rectangle implements Measurable {
   private double width;
   private double height;

   /**
   * @param width
   * @param height
   */
   public Rectangle(double width, double height) {
       this.width = width;
       this.height = height;
   }

   /**
   * @return the width
   */
   public double getWidth() {
       return width;
   }

   /**
   * @param width
   * the width to set
   */
   public void setWidth(double width) {
       this.width = width;
   }

   /**
   * @return the height
   */
   public double getHeight() {
       return height;
   }

   /**
   * @param height
   * the height to set
   */
   public void setHeight(double height) {
       this.height = height;
   }

   @Override
   public double getPerimeter() {
       // TODO Auto-generated method stub
       return 2 * (width + height);
   }

   @Override
   public double getArea() {
       // TODO Auto-generated method stub
       return width * height;
   }

}

==========================================

// Test.java

public class Test {

   public static void main(String[] args) {
  
       Rectangle r1=new Rectangle(6,7);
       System.out.println("Area :"+r1.getArea());
       System.out.println("Perimeter :"+r1.getPerimeter());
      

   }

}

=======================================

Output:

Area :42.0
Perimeter :26.0

=====================Could you plz rate me well.Thank You