1 /* 2 * Program that paints 100 red, yellow, and orange balloons in a blue sky. 3 */ 4 5 package npw; 6 7 import java.awt.Color; 8 import java.util.Random; 9 import javax.swing.SwingUtilities; 10 import painter.SPainter; 11 import shapes.SCircle; 12 import shapes.SSquare; 13 14 public class Balloons { 15 16 public Balloons() { 17 paintTheImage(); 18 } 19 20 public static void main(String[] args) { 21 SwingUtilities.invokeLater(new Runnable() { 22 @Override 23 public void run() { 24 new Balloons(); 25 } 26 }); 27 } 28 29 private void paintTheImage() { 30 SPainter painter = new SPainter("Balloons" , 600 , 600 ); 31 paintSky(painter); 32 int nrOfBalloons = 100; 33 paintBalloons(painter,nrOfBalloons); 34 } 35 36 private void paintBalloons(SPainter painter, int nrOfBalloons) { 37 int i = 1; 38 while (i <= nrOfBalloons) { 39 paintOneBalloon(painter); 40 i = i + 1; 41 } 42 } 43 private void paintSky(SPainter painter) { 44 painter.setColor(Color.BLUE); 45 SSquare sky = new SSquare(2000); 46 painter.paint(sky); 47 } 48 49 50 private void paintOneBalloon(SPainter painter) { 51 Random rgen = new Random(); 52 int rn = rgen.nextInt(3); 53 if ( rn == 0 ) { 54 painter.setColor(Color.RED); 55 } else if ( rn == 1 ) { 56 painter.setColor(Color.ORANGE); 57 } else { 58 painter.setColor(Color.YELLOW); 59 } 60 painter.move(); 61 int balloonRadius = 20; 62 SCircle balloon = new SCircle(balloonRadius); 63 painter.paint(balloon); 64 painter.setColor(Color.BLACK); 65 painter.draw(balloon); 66 } 67 } 68