Write the equals method for Circle2 which returns true when the radius and the color are the same as the parameter’s radius and color.
Write the equals method for Circle2 which returns true when the radius and the color are the same as the parameter’s radius and color.
The TestCircle2, Circle2 and GeometricObject2 classes are given as follows.
public class TestCircle2 {
public static void main(String[] args) {
Circle2 c1 = new Circle2(2.3, "red");
Circle2 c2 = new Circle2(5.6, "white");
Circle2 c3 = new Circle2(2.3, "red");
System.out.println("c1 equals c2: " + c1.equals(c2));
System.out.println("c1 equals c3: " + c1.equals(c3));
System.out.println("c2 equals c3: " + c2.equals(c3));
}
}
class Circle2 extends GeometricObject2 {
private double radius;
public Circle2() {
}
public Circle2(double radius) {
this.radius = radius;
}
public Circle2(double radius, String color) {
this.radius = radius;
setColor(color);
}
/**
* Return radius
*/
public double getRadius() {
return radius;
}
/**
* Set a new radius
*/
public void setRadius(double radius) {
this.radius = radius;
}
@Override
/**
* Return area
*/
public double getArea() {
return radius * radius * Math.PI;
}
/**
* Return diameter
*/
public double getDiameter() {
return 2 * radius;
}
@Override
/**
* Return perimeter
*/
public double getPerimeter() {
return 2 * radius * Math.PI;
}
/* Print the circle info */
public void printCircle() {
System.out.println("The circle is created " + getDateCreated()
+ " and the radius is " + radius);
}
public boolean equals(Object obj) {
}
}
abstract class GeometricObject2 {
private String color = "white";
private boolean filled;
private java.util.Date dateCreated;
/**
* Construct a default geometric object
*/
protected GeometricObject2() {
dateCreated = new java.util.Date();
}
/**
* Construct a geometric object with color and filled value
*/
protected GeometricObject2(String color, boolean filled) {
dateCreated = new java.util.Date();
this.color = color;
this.filled = filled;
}
/**
* Return color
*/
public String getColor() {
return color;
}
/**
* Set a new color
*/
public void setColor(String color) {
this.color = color;
}
/**
* Return filled. Since filled is boolean, the get method is named isFilled
*/
public boolean isFilled() {
return filled;
}
/**
* Set a new filled
*/
public void setFilled(boolean filled) {
this.filled = filled;
}
/**
* Get dateCreated
*/
public java.util.Date getDateCreated() {
return dateCreated;
}
@Override
public String toString() {
return "created on " + dateCreated + "\ncolor: " + color
+ " and filled: " + filled;
}
/**
* Abstract method getArea
*/
public abstract double getArea();
/* public double getArea()
{
return 0;
}*/
/**
* Abstract method getPerimeter
*/
public abstract double getPerimeter();
/* public double getPerimeter()
{
return 0;
} */
}
output:
c1 equals c2: false
c1 equals c3: true
c2 equals c3: false
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