CirclePanel.java

// *** Your name: 
import java.awt.Graphics;
import java.util.Arrays;

import javax.swing.JPanel;

public class CirclePanel extends JPanel {
	
	private int numCircles = 0;
	private Circle[] circles = new Circle[200];
	
	public void paintComponent(Graphics g) {
		super.paintComponent(g);
		for (int i = 0; i < numCircles; i++) {
		    circles[i].draw(g);
		}
	}
	
	public void addCircle(Circle Circle) {
	    if (numCircles == circles.length || Circle == null)
	        return;
	    circles[numCircles] = Circle;
	    numCircles++;
	}
	
	public Circle containsPoint(int x, int y) {
		for (int i = numCircles - 1; i >= 0; i--) {
		    if (circles[i].containsPoint(x, y))
		    		return circles[i];
		}
		return null;
	}
	
	public Circle[] getCircles() {
		Circle[] activeCircles = new Circle[numCircles];
	    for (int i = 0; i < numCircles; i++) {
	        activeCircles[i] = circles[i];
	    }
	    return activeCircles;
	}

	public void setCircles(Circle[] circles) {
		this.circles = circles;
	}

	public int getNumCircles() {
		return numCircles;
	}
	
	public void removeMostRecentCircle() {
		//implement this method
		if (numCircles > 0) {
	        numCircles--;
	        circles[numCircles] = null;
	        repaint();
	    }
	}
	
	public void removeAllCircles() {
		//implement this method
		for (int i = 0; i < numCircles; i++) {
	        circles[i] = null;
	    }
	    numCircles = 0;
	    repaint();
	}

}