import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;

import javax.swing.JButton;
import javax.swing.JColorChooser;
import javax.swing.JFrame;

public class Draw extends JFrame implements MouseMotionListener,ActionListener{
JColorChooser jc = new JColorChooser();
Graphics g;
Color bg;
JButton eraser = new JButton("erase");
public Draw(){
	this.setTitle("GPaint");
	this.setSize(800,800);
	this.setLayout(new BorderLayout());
//	this.add(jc,BorderLayout.NORTH);
//	this.add(eraser,BorderLayout.SOUTH);
	this.setVisible(true);
	this.addMouseMotionListener(this);
	g=this.getGraphics();
	g.setColor(Color.orange);
	this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Draw a = new Draw();
System.out.println(a.getWidth());
	}


	@Override
	public void actionPerformed(ActionEvent arg0) {
		// TODO Auto-generated method stub

	}

	@Override
	public void mouseDragged(MouseEvent arg0) {
		// TODO Auto-generated method stub
		g.setColor(Color.red);
		g.fillOval(arg0.getX(), arg0.getY(), 10, 10);
	}

	@Override
	public void mouseMoved(MouseEvent arg0) {
		// TODO Auto-generated method stub

	}
	public void paint(Graphics g){
		g.setColor(Color.red);
		int y[]=new int[400];
		double r=20;
		for(r=20;r<400;r+=40){
		for(int x=0;x<400;x++)
		//	y[x]=x*x/10;
			y[x]=(int)Math.sqrt(Math.pow(r, 2)-Math.pow(x, 2));
		for(int x=0;x<399;x++){
			g.drawLine(x+this.getWidth()/2, -y[x]+this.getHeight()/2, x+this.getWidth()/2, -y[x+1]+this.getHeight()/2);
			g.drawLine(-x+this.getWidth()/2, -y[x]+this.getHeight()/2,-x+this.getWidth()/2, -y[x+1]+this.getHeight()/2);
			g.drawLine(-x+this.getWidth()/2, +y[x]+this.getHeight()/2,-x+this.getWidth()/2, +y[x+1]+this.getHeight()/2);
			g.drawLine(+x+this.getWidth()/2, +y[x]+this.getHeight()/2,+x+this.getWidth()/2, +y[x+1]+this.getHeight()/2);
	}}
		for(r=10;r<400;r+=10){
		for(int x=0;x<400;x++)
		//	y[x]=x*x/10;
			y[x]=(int)Math.sqrt(Math.pow(r, 2)-Math.pow(x, 2));
		for(int x=0;x<399;x++){
			g.drawLine(x+this.getWidth()/2, -y[x]+this.getHeight()/2, x+this.getWidth()/2, -y[x+1]+this.getHeight()/2);
			g.drawLine(-x+this.getWidth()/2, -y[x]+this.getHeight()/2,-x+this.getWidth()/2, -y[x+1]+this.getHeight()/2);
			g.drawLine(-x+this.getWidth()/2, +y[x]+this.getHeight()/2,-x+this.getWidth()/2, +y[x+1]+this.getHeight()/2);
			g.drawLine(+x+this.getWidth()/2, +y[x]+this.getHeight()/2,+x+this.getWidth()/2, +y[x+1]+this.getHeight()/2);
	}}
		g.drawLine(0, this.getHeight()/2, this.getWidth(), this.getHeight()/2);
		g.drawLine(this.getWidth()/2, 0, this.getWidth()/2, this.getHeight());
		}
}