Resize a shape : Shape « 2D Graphics GUI « Java

Resize a shape


import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.Rectangle2D;

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

public class ResizeRectangle extends JPanel {
  private int SIZE = 8;
  private Rectangle2D[] points = { new Rectangle2D.Double(50, 50,SIZE, SIZE), new Rectangle2D.Double(150, 100,SIZE, SIZE) };
  Rectangle2D s = new Rectangle2D.Double();

  ShapeResizeHandler ada = new ShapeResizeHandler();

  public ResizeRectangle() {

  public void paintComponent(Graphics g) {

    Graphics2D g2 = (Graphics2D) g;

    for (int i = 0; i < points.length; i++) {
    s.setRect(points[0].getCenterX(), points[0].getCenterY(),
        Math.abs(points[1].getCenterY()- points[0].getCenterY()));


  class ShapeResizeHandler extends MouseAdapter {
    Rectangle2D r = new Rectangle2D.Double(0,0,SIZE,SIZE);
    private int pos = -1;
    public void mousePressed(MouseEvent event) {
      Point p = event.getPoint();

      for (int i = 0; i < points.length; i++) {
        if (points[i].contains(p)) {
          pos = i;

    public void mouseReleased(MouseEvent event) {
      pos = -1;

    public void mouseDragged(MouseEvent event) {
      if (pos == -1)


  public static void main(String[] args) {

    JFrame frame = new JFrame("Resize Rectangle");

    frame.add(new ResizeRectangle());
    frame.setSize(300, 300);


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