about.java

J2ME编写的手机上的一个小游戏---Balls

package balls;

import javax.microedition.lcdui.*;

/**
 * Typical about box with a string and an image.
 * In this case the Sun copyright and logo.
 */

public class About {

    private static String copyright =
        "Copyright 2000-2001 Sun Microsystems Inc. All Rights Reserved.\n"
      + "Sun, Sun Microsystems, the Sun logo, Java, and all Sun-based and"
      + "Java-based marks are trademarks or registered trademarks of Sun "
      + "Microsystems, Inc. in the United States and other countries.\n"
      + "\n"
      + "This product meets the Mobile Information Device Profile "
      + "specification, containing tested and compliant "
      + "Mobile Information Device Profile "
      + "software from Sun Microsystems, Inc.\n"
      + "\n"
      + "Use is subject to license terms and limited to demonstration only. "
      + "Sun Microsystems, Inc.  has intellectual property rights relating "
      + "to the technology embodied in this software.  In particular, and "
      + "without limitation, these intellectual property rights may include "
      + "one or more U.S. patents, foreign patents, or pending applications.\n"
      + "U.S. Government approval required when exporting the product.\n"
      + "\n"
      + "FEDERAL ACQUISITIONS\n"
      + "Commercial Software -- Government Users Subject to Standard "
      + "License Terms and Conditions.";

    private Displayable previous; // the previous screen to go back to

    private About() {};		// no instances

    /**
     * Put up the About box and when the use click ok return
     * to the previous screen.
     */
    public static void showAbout(Display display) {

	Alert alert = new Alert("About MIDP");
	alert.setTimeout(Alert.FOREVER);

	if (display.numColors() > 2) {
	    String icon = (display.isColor()) ?
		"/icons/JavaPowered-8.png" : "/icons/JavaPowered-2.png";

	    try {
	        Image image = Image.createImage(icon);
		alert.setImage(image);
	    } catch (java.io.IOException x) {
		// just don't append the image.
	    }
	}
	// Add the copyright
	alert.setString(copyright);

	display.setCurrent(alert);
    }

}