How to Strech and move Line

Question

i havw written a line component by inheriting JComponent class and using the Line2D.Double class
to draw the line . now i want to strech the line using mouseevent .i think setLine function can be used
to strech &move the line . i tried but i failed .please help me. tell me wether it can be done with it
or by other function PLEASE HELP with Some Source Code.

Answer 1

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import javax.swing.*;
import javax.swing.event.*;
public class rajkumar extends JPanel implements MouseInputListener {
  int x1, y1, x2, y2;
  public rajkumar() {
    addMouseListener(this);
    addMouseMotionListener(this);
  public void mousePressed(MouseEvent e) {
    x1 = e.getX();
    y1 = e.getY();
  public void mouseDragged(MouseEvent e) {
    x2 = e.getX();
    y2 = e.getY();
    repaint();
  public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2 = (Graphics2D)g;
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                        RenderingHints.VALUE_ANTIALIAS_ON);
    double width  = getSize().width;
    double height = getSize().height;
    Shape
      staticLine = new Line2D.Double(width/4, height/2, width/2, height/2),
      movingLine = new Line2D.Double(x1, y1, x2, y2);
    g2.draw(staticLine);
    g2.draw(movingLine); 
  public void mouseEntered(MouseEvent e)  {}
  public void mouseExited(MouseEvent e)   {}
  public void mouseClicked(MouseEvent e)  {}
  public void mouseReleased(MouseEvent e) {}
  public void mouseMoved(MouseEvent e)    {}
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().add(new rajkumar());
    frame.setSize(400,300);
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
}