Homework problem is in the description

Question

Prepare a program that will perform the followings:
1) It will prepare a drawing area of 600 pixels by 600 pixels.
2) It will draw (not fill) a black rectangle with the following 4 corners:
(100, 100), (500, 100), (100, 500), and (500, 500).
3) It will ask the user to enter the following information on a circle:
the x-coordinate value of the center of the circle,
the y-coordinate value of the center of the circle, and
the radius of the circle.
4) It will draw(fill) the circle with the provided center and the radius.
But, it will use a different color for the circle depending on the
following conditions:
If the circle is completely enclosed within the rectangle, it will use
yellow. Else, it will use gray.

Answer 1

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Color;
import javax.swing.*;

public class RectangleCircle extends JPanel {
private static final int RECT_X = 100;
private static final int RECT_Y = RECT_X;
private static final int RECT_WIDTH = 400;
private static final int RECT_HEIGHT = RECT_WIDTH;

private static int centerX;
private static int centerY;
private static int radius;
private static boolean rectCircleFlag; // true if the circle lies entirely inside the rectangle

@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
// draw the rectangle here
g.drawRect(RECT_X, RECT_Y, RECT_WIDTH, RECT_HEIGHT);

int r = radius;
int x = centerX-(r/2);
int y = centerY-(r/2);

int maxX = RECT_X + RECT_WIDTH;
int maxY = RECT_Y + RECT_HEIGHT;

rectCircleFlag = ( ((x-r)<RECT_X) || ((x+r)>maxX) || ((y-r)<RECT_Y) || ((y+r)>maxY) );

//Color myColor = new Color();
if (rectCircleFlag)
{
g.setColor(Color.YELLOW);
}
else
{
g.setColor(Color.GRAY);
}

g.fillOval(x,y,r,r);


}

@Override
public Dimension getPreferredSize() {
// so that our GUI is big enough
return new Dimension(RECT_WIDTH + 2 * RECT_X, RECT_HEIGHT + 2 * RECT_Y);
}

// create the GUI explicitly on the Swing event thread
private static void createAndShowGui() {
RectangleCircle mainPanel = new RectangleCircle();


String inbuff = JOptionPane.showInputDialog(" Please Input the X-coordinate of the center of the circle");
centerX = Integer.parseInt(inbuff);


inbuff = JOptionPane.showInputDialog(" Please Input the Y-coordinate of the center of the circle");
centerY = Integer.parseInt(inbuff);


inbuff = JOptionPane.showInputDialog(" Please Input the Radius of the circle");
radius = Integer.parseInt(inbuff);

System.out.println(" Center X = " + centerX + " : Center Y = " + centerY + " : radius = " +radius);



JFrame frame = new JFrame("DrawRect");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}

public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}