Plz help me answer this

Question

Prepare a program that will perform the followings:
1) It will prepare a drawing area of 600pixels by 600 pixels.
2) It will draw (not fill) a black rectangle with the following 4 corners:
(200, 200), (400, 200), (200, 400), and (400, 400).
3) It will ask the user to enter the following information on a circle:
the x-coordinate value of center of the circle,
the y-coordinate value of 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 different color for the circle depending on the
following conditions:
If the center of the circle is inside the black rectangle, it will use a
yellow for the circle. If it is right on the rectangle, it will use
red. If it is outside, it will use green.

Answer 1

import java.awt.Dimension;

import java.awt.Graphics;

import javax.swing.*;

import java.awt.Color;

public class DrawRect extends JPanel {

private static final int RECT_X = 200;

private static final int RECT_Y = RECT_X;

private static final int RECT_WIDTH =200;

private static final int RECT_HEIGHT = RECT_WIDTH;

private int radius;

private int centerX;

private int centerY;

@Override

protected void paintComponent(Graphics g)

{

//inputs circle radius and center

String inbuff=null;

while (inbuff==null)

{

inbuff = JOptionPane.showInputDialog(null,"Please input the radius of the circle :>");

}

radius = Integer.parseInt(inbuff);

inbuff=null;

while (inbuff==null)

{

inbuff = JOptionPane.showInputDialog(null,"Please input Center x :>");

}

centerX = Integer.parseInt(inbuff);

inbuff=null;

while (inbuff==null)

{

inbuff = JOptionPane.showInputDialog(null,"Please input Center Y :>");

}

centerY = Integer.parseInt(inbuff);

super.paintComponent(g);

// draw the rectangle here

g.drawRect(RECT_X, RECT_Y, RECT_WIDTH, RECT_HEIGHT);

// center of circle is inside the rectangle

if (( centerX>=200) && (centerX<=400) && (centerY>=200) && (centerY<=400))

{

g.setColor(Color.YELLOW);

}

//center of circle is outside the rectangle

if ((centerX<200) || (centerX>400) || (centerY<200) || (centerY>400))

{

g.setColor(Color.GREEN);

}

//center of the circle is ON the rectange

if (

((centerX>=200) && (centerX<=400) && ((centerY==200) || (centerY==400))) ||

((centerY>=200) && (centerY<=400) && ((centerX==200) || (centerX==400)))

)

{

g.setColor(Color.RED);

}

g.fillOval(centerX-radius,centerY-radius,2*radius,2*radius);

}

@Override

public Dimension getPreferredSize() {

// so that our GUI is big enough

return new Dimension(600,600);

}

// create the GUI explicitly on the Swing event thread

private static void createAndShowGui() {

DrawRect mainPanel = new DrawRect();

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();

}

});

}

}