First Swing steps - RandomSquares

8

RandomSquares

RandomSquares.java

// <applet code="RandomSquares" width="300" height="200"></applet>
import java.applet.Applet;
import java.awt.Graphics;
import java.awt.Color;
public class RandomSquares extends Applet {
protected int numberOfSquares = 8;
public void paint(Graphics g) {
int width = getSize().width, height = getSize().height;
int maxsize = Math.min(width, height);
// System.out.println(g.getClip());
g.setClip(null);
g.setColor(Color.white);
g.fillRect(0, 0, width, height);
for (int n = 0; n < numberOfSquares; n++) {
Color c = new Color(rint(256), rint(256), rint(256));
int l = rint(maxsize / 2);
int x = rint(width - l);
int y = rint(height - l);
g.setColor(c);
g.fillRect(x, y, l, l);
}
}
public void update(Graphics g) {
paint(g);
}
private int rint(int max) {
return (int) Math.floor(Math.random() * max);
}
}

$ javac RandomSquares.java 
$ appletviewer RandomSquares.java

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