I don\'t know why nobody answer my this question.Here is the question: Create a

Question

I don't know why nobody answer my this question.Here is the question:


Create a class named MyRectangle to represent rectangles. The required data fields are width, height, and color. Use double data type for width and height, and a String for color. Suppose that all rectangles are the same color. Use a static variable for color. You will need to provide the accessor methods for the properties and a method findArea() for computing the area of the rectangle.

rite a program to test your class MyRectangle. In the client program, create two MyRectangle objects. Assign a width and height to each of the two objects. Assign the first object the color red, and the second, yellow. Display all properties of both objects including their area.

The following is my answer.But i got both color yellow when i run the code.It supposed to be first Red and second yello.
If anyone can fix it i would be glad.
class MyRectangle
{
private double width = 1.0;

private double height = 1.0;

private static String color ="White";

public MyRectangle()
{
width = 1.0;
height = 1.0;
}

public MyRectangle(double widthParam,double heightParam, String colorParam)
{
setWidth(widthParam);
setHeight(heightParam);
setColor(colorParam);
}

public double getWidth()
{
return width;
}

public void setWidth(double widthParam)
{
width = widthParam;
}

public double getHeight()
{
return height;
}

public void setHeight(double heightParam)
{
height = heightParam;
}

public String getColor()
{
return color;
}

public static void setColor(String colorParam)
{
color = colorParam;
}

public double findArea()
{
return getWidth()*getHeight();
}

public static void main(String [] args){
MyRectangle r1 = new MyRectangle(1.5,2,"Red");
MyRectangle r2 = new MyRectangle(3,5.5,"yellow");
print(r1,1);
print (r2,2);
}
public static void print(MyRectangle r, int n)
{System.out.println("Rectangle "+n);
System.out.println("height: "+r.getHeight());
System.out.println("width: "+r.getWidth());
System.out.println("color: "+r.getColor());
System.out.println("area: "+r.findArea()+" ");
}
}

Explanation / Answer

please rate - thanks

it's because color is static, which I believe was the way it was defined in the original post

the static says that the variable coloris associated with the class, not a specific instance of that class, so all the color will be the last value


class MyRectangle
{
private double width = 1.0;

private double height = 1.0;

private String color="white";

public MyRectangle()
{
width = 1.0;
height = 1.0;
}

public MyRectangle(double widthParam,double heightParam, String colorParam)
{
setWidth(widthParam);
setHeight(heightParam);
setColor(colorParam);


}

public double getWidth()
{
return width;
}

public void setWidth(double widthParam)
{
width = widthParam;
}

public double getHeight()
{
return height;
}

public void setHeight(double heightParam)
{
height = heightParam;
}

public String getColor()
{
return color;
}

public void setColor(String colorParam)
{
color = colorParam;
}

public double findArea()
{
return getWidth()*getHeight();
}

public static void main(String [] args){

MyRectangle r1 = new MyRectangle(1.5,2,"Red");
MyRectangle r2 = new MyRectangle(3,5.5,"yellow");
print(r1,1);
print (r2,2);

}
public static void print(MyRectangle r, int n)
{System.out.println("Rectangle "+n);
System.out.println("height: "+r.getHeight());
System.out.println("width: "+r.getWidth());
System.out.println("color: "+r.getColor());
System.out.println("area: "+r.findArea()+" ");
}
}

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