GUI Class

package paint;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.*;
import java.awt.ActiveEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class GUI extends JFrame implements MouseListener , MouseMotionListener{

	   /**
    *
    */
   private static final long serialVersionUID = 1L;
JButton ClearBtn , RedBtn ,BlackBtn , LineBtn;
JFrame paint = new JFrame("Paint");
JPanel controls = new JPanel();
private int OldX , OldY , CurrentX , CurrentY ;
boolean LineClicked = false  ;

MouseEvent mouse;
Sketch sketch = new Sketch();
Container content = paint.getContentPane();
ActionListener action= new ActionListener() {

	@Override
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
	       System.out.println(e.getSource() == ClearBtn);
	       System.out.println(e.getSource());

		  if (e.getSource()==RedBtn) {
		       sketch.red();
		   }
		   else if (e.getSource() == ClearBtn) {
			   System.out.println(e.getSource() == ClearBtn);
				if(e.getSource() == ClearBtn){
					sketch.clear();
				}
		   }
	}
};


   public static void main (String[] args) {
//     GUI here = new GUI ();
//     here.setVisible(true);
       new GUI().show();

   }
 public void show () {
     paint.setLayout(new BorderLayout());

//   sketch.setLayout(new BorderLayout());

content.add(sketch, BorderLayout.SOUTH);
       content.setLayout(new BorderLayout());
     content.add(sketch, BorderLayout.CENTER);
     // create control .. buttons
     JButton BlackBtn = new JButton();

     BlackBtn.setBackground(Color.black);


     BlackBtn.addActionListener(action);

     ClearBtn = new JButton();
     ClearBtn.setVisible(true);
     ClearBtn.setText("CLEAR");
 	ClearBtn.addActionListener(action);
 	ClearBtn.setBackground(Color.white);
     ClearBtn.setForeground(Color.black);
 	getContentPane().add(ClearBtn);


 	RedBtn = new JButton();
 	RedBtn.setVisible(true);
 	RedBtn.addActionListener(action);
 	RedBtn.setBackground(Color.RED);
 	RedBtn.setForeground(Color.black);
	getContentPane().add(RedBtn);
     RedBtn.setBackground(Color.red);

     LineBtn = new JButton();
     LineBtn.setVisible(true);
 	LineBtn.addActionListener(action);
 	LineBtn.setText("line");

    LineBtn.setForeground(Color.green);
 	getContentPane().add(LineBtn);
    LineBtn.addMouseListener(this);

     controls.add(RedBtn);
     controls.add(BlackBtn);
     controls.add(LineBtn);
     controls.add(ClearBtn);


     content.add(controls , BorderLayout.NORTH);
     paint.setSize(600, 600);
     paint.setVisible(true);
 }
@Override
public void mouseDragged(MouseEvent e) {
	// TODO Auto-generated method stub

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

}
@Override
public void mouseClicked(MouseEvent e) {
	// TODO Auto-generated method stub
	if (e.getSource() == LineBtn){
		LineClicked = true ;
	}



}
@Override
public void mouseEntered(MouseEvent e) {
	// TODO Auto-generated method stub

}
@Override
public void mouseExited(MouseEvent e) {
	// TODO Auto-generated method stub

}
@Override
public void mousePressed(MouseEvent e) {
	// TODO Auto-generated method stub
	if (LineClicked){
		OldX = e.getX();
		OldY = e.getY();
	}

}
@Override
public void mouseReleased(MouseEvent e) {
	// TODO Auto-generated method stub
	CurrentX=e.getX();
	CurrentY=e.getY();

	if (sketch.graphic !=null){
		sketch.graphic.drawLine(OldX , OldY , CurrentX , CurrentY);
		repaint();
		OldX = CurrentX;
		OldY = CurrentY;
	}
}

}