Write a class named Rectangle to represent rectangles The da
Solution
public class rectangle {
 double width;
 double height;
 String color=\"\";
 rectangle(double width,double height,String color){
    setwidth(width);
    setheight(height);
    setcolor(color);
 }
 public void setcolor(String color) {
    this.color=color;
   
 }
 public void setheight(double height) {
    this.height=height;
   
   
 }
 public void setwidth(double width) {
    this.width=width;
   
 }
 public String getcolor(){
    return color;
 }
 public double getwidth(){
    return width;
 }
 public double getheight(){
    return height;
 }
 public String tostring(){
    return \"width is:\"+width+\"\\theight is: \"+height+\"\\tcolor is:\"+color;
 }
 public double findArea(){
 double area=height*width;
 return area;
}
   
 }
main class:
public class maind1 {
   public static void main(String[] args) {
    rectangle r1=new rectangle(12.1,3.3,\"red\");
    double area= r1.findArea();
    System.out.println(r1.tostring());
    System.out.println(area);
    rectangle r2=new rectangle(3.5,7.4,\"yellow\");
    area= r2.findArea();
    System.out.println(r2.tostring());
    System.out.println(\"area is\"+area);
   }
 }
output:
width is:12.1   height is: 3.3   color is:red
 39.93
 width is:3.5   height is: 7.4   color is:yellow
 area is25.900000000000002
2nd program:
public class fan {
    final int slow=1;
    final int medium=2;
    final int fast=3;
    private int speed=slow;
    private boolean on=false;
    private double radius=5;
    private String color=\"red\";
    fan(){
    }
    fan(int speed,boolean on,double radius,String color){
    seton(on);
    setradius(radius);
    setcolor(color);
    setspeed(speed);
  
    }
   public void setspeed(int speed) {
        this.speed=speed;
       
    }
    public int getspeed(){
        return speed;
    }
    public double getradius() {
        return radius;
    }
public String getcolor() {
       return color;
    }
   public boolean geton() {
        return on;
    }
   public void setcolor(String color) {
       
        this.color=color;
    }
   public void setradius(double radius) {
        this.radius=radius;
    }
   public void seton(boolean on) {
        this.on=on;
    }
   public String tostring(){
        return \"speed is:\"+speed+\"\\tcondition:\"+on+\"\\tradius :\"+radius+\"\\tcolor:\"+color;
    }
 }
public class maind1 {
   public static void main(String[] args) {
    fan f1=new fan(3,true,10,\"yellow\");
    System.out.println(f1.tostring());
   }
 }
output:
speed is:3 condition:true radius :10.0 color:yellow



