📄 colorboxesframe.html

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<html><head><title>Display page for ColorBoxes at www.BruceEckel.com</title></head>
<FONT FACE="Verdana,Tahoma,Arial,Helvetica,Sans" SIZE="-1">
<FONT FACE="Verdana,Tahoma,Arial,Helvetica,Sans"><H2>ColorBoxes.java</H2><hr></FONT>
<!--"CONVERTED_APPLET"-->
<!-- HTML CONVERTER -->
<OBJECT 
    classid = "clsid:CAFEEFAC-0014-0001-0001-ABCDEFFEDCBA"
    codebase = "http://java.sun.com/products/plugin/autodl/jinstall-1_4_1_01-windows-i586.cab#Version=1,4,1,1"
    WIDTH = "500" HEIGHT = "400" ALIGN = "baseline" >
    <PARAM NAME = CODE VALUE = "ColorBoxes.class" >
    <PARAM NAME = "type" VALUE = "application/x-java-applet;jpi-version=1.4.1_01">
    <PARAM NAME = "scriptable" VALUE = "false">

    <COMMENT>
	<EMBED 
            type = "application/x-java-applet;jpi-version=1.4.1_01" 
            CODE = "ColorBoxes.class"
            WIDTH = "500"
            HEIGHT = "400"
            ALIGN = "baseline"  
	    scriptable = false 
	    pluginspage = "http://java.sun.com/products/plugin/index.html#download">
	    <NOEMBED>
            
            </NOEMBED>
	</EMBED>
    </COMMENT>
</OBJECT>

<!--
<APPLET CODE = "ColorBoxes.class" WIDTH = "500" HEIGHT = "400" ALIGN = "baseline">


</APPLET>
-->


<!--"END_CONVERTED_APPLET"-->

<FONT SIZE="+3"><PRE><B>
//: c14:ColorBoxes.java
// Using the Runnable interface.
// &lt;applet code=ColorBoxes width=500 height=400&gt;
// &lt;param name=grid value="12"&gt;
// &lt;param name=pause value="50"&gt;&lt;/applet&gt;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import com.bruceeckel.swing.*;

class CBox extends JPanel implements Runnable {
  private Thread t;
  private int pause;
  private static final Color[] colors = {
    Color.BLACK, Color.BLUE, Color.CYAN,
    Color.DARK_GRAY, Color.GRAY, Color.GREEN,
    Color.LIGHT_GRAY, Color.MAGENTA,
    Color.ORANGE, Color.PINK, Color.RED,
    Color.WHITE, Color.YELLOW
  };
  private static Random rand = new Random();
  private static final Color newColor() {
    return colors[rand.nextInt(colors.length)];
  }
  private Color cColor = newColor();
  public void paintComponent(Graphics  g) {
    super.paintComponent(g);
    g.setColor(cColor);
    Dimension s = getSize();
    g.fillRect(0, 0, s.width, s.height);
  }
  public CBox(int pause) {
    this.pause = pause;
    t = new Thread(this);
    t.start();
  }
  public void run() {
    while(true) {
      cColor = newColor();
      repaint();
      try {
        t.sleep(pause);
      } catch(InterruptedException e) {
        throw new RuntimeException(e);
      }
    }
  }
}

public class ColorBoxes extends JApplet {
  private boolean isApplet = true;
  private int grid = 12;
  private int pause = 50;
  public void init() {
    // Get parameters from Web page:
    if(isApplet) {
      String gsize = getParameter("grid");
      if(gsize != null)
        grid = Integer.parseInt(gsize);
      String pse = getParameter("pause");
      if(pse != null)
        pause = Integer.parseInt(pse);
    }
    Container cp = getContentPane();
    cp.setLayout(new GridLayout(grid, grid));
    for(int i = 0; i &lt; grid * grid; i++)
      cp.add(new CBox(pause));
  }
  public static void main(String[] args) {
    ColorBoxes applet = new ColorBoxes();
    applet.isApplet = false;
    if(args.length &gt; 0)
      applet.grid = Integer.parseInt(args[0]);
    if(args.length &gt; 1)
      applet.pause = Integer.parseInt(args[1]);
    Console.run(applet, 500, 400);
  }
} ///:~
</B></PRE></FONT>
</html>
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