2030PracticeLabTest1.java

import java.util.Objects;

/**
* A class that represents a circle. The circle is defined by its two-dimensional center point and its radius.
* The class allows circles to be compared using the radius of each circle. The class ensures that all circle objects will always have a radius greater than zero.
*/
public class Circle {
	
	// ATTRIBUTES

	private double x, y, r;
	
	
	// CONSTRUCTORS

	/**
	* Initializes this circle with center point located at (0, 0) and radius equal to 1.
	*/
	public Circle() {

	}

	/**
	* Initializes this circle with center point located at (x, y) and radius equal to r.
	*
	* @param x the x-coordinate of the center point of the circle
	* @param y the y-coordinate of the center point of the circle
	* @param r the radius of the circle
	* @throws IllegalArgumentException if the radius is not greater than zero
	* @pre. r > 0
	*/
	public Circle(double x, double y, double r) {

	}

	/**
	* Initializes this circle with the same center point and radius as other
	*
	* @param other the circle to copy
	*/
	public Circle(Circle other) {

	}
	
	
	// GETTERS AND SETTERS

	/**
	* Returns the x-coordinate of the center point of the circle
	*
	* @return the x-coordinate of the center point of the circle
	*/
	public double getCenterX() {

	}

	/**
	* Returns the y-coordinate of the center point of the circle
	*
	* @return the y-coordinate of the center point of the circle
	*/
	public double getCenterY() {

	}

	/**
	* Returns the radius of the circle
	*
	* @return the radius of the circle
	*/
	public double getRadius() {

	}

	/**
	* Sets the center point of this circle
	*
	* @param x the new x-coordinate of the center of this circle
	* @param y the new y-coordinate of the center of this circle
	*/
	public void setCenter(double x, double y) {

	}

	/**
	* Sets the radius of this circle
	*
	* @param r the new radius of this circle
	* @throws IllegalArgumentException if r is not greater than zero
	* @pre. r > 0
	*/
	public void setRadius(double r) {

	}
	
	
	// CUSTOM METHODS

	/**
	* Returns the area of this circle using A = pi * r ^ 2
	*
	* @return the area of this circle using A = pi * r ^ 2
	*/
	public double getArea() {

	}

	/**
	* Moves the circle by the specified coordinates x, y
	*
	* @param x the amount to shift horizontally
	* @param y the amount to shift vertically
	*/
	public void moveBy(double x, double y) {

	}
	
	/**
	* Returns true if the point is inside or on this circle. A point is contained in a circle if the Euclidean distance of the absolute difference of the coordinates is less than or equal to the radius of the circle
	*
	* @param x the x coordinate of the point
	* @param y the y coordinate of the point
	* @return true if circle contains point; false if the point is outside the circle
	*/
	public boolean containsPoint(double x, double y) {

	}

	
	// OVERRIDDEN METHODS
	
	/**
	* Compares two circles by their radius. The result is negative if this circle has a smaller radius than the other circle. The result is positive if this circle has a larger radius than the other circle. The result is 0 if both circles have the same radius.
	*
	* @param other the circle to be compared
	* @return the value 0 if both circles have the same radius; a negative value if this circle has a smaller radius than the other circle; and a positive value if this circle has a larger radius than the other circle
	*/
	@Override
	public int compareTo(Circle other) {

	}

	/**
	* Compares this circle to the specified object. The result is true if and only if the argument is not null and is a Circle object with center point and radius equal to this circle's center point and radius.
	*
	* @param obj the object to compare against this circle
	* @return true if the given object represents a Circle equivalent to this circle; false otherwise
	*/
	@Override
	public boolean equals(Object obj) {

	}

	/**
	* Returns a hash code for this circle. The hash code is computed using Objects.hash
	*
	* @return a hash code for this circle
	*/
	@Override
	public int hashCode() {

	}

	/**
	* Returns the string containing the center point of the circle followed by a comma and space, followed by the radius.
	*
	* @return A string representation of the circle with format "(x, y), r"
	*/
	@Override
	public String toString() {

	}

}