About MRJ 2.2.4

 About Mac OS Runtime for Java MRJ 2.2.4 Mac OS Runtime for Java (MRJ) 2.2.4 is an upgrade to MRJ 2.2.3 which addresses a security issue affecting our users. In some cases, this would have permitted unauthorized applets to access the local hard drive. The release notes from MRJ 2.2, MRJ 2.2.2, and MRJ 2.2.3 appear below. Apart from the information above, these release notes still apply.  About Mac OS Runtime for Java MRJ 2.2.3 Mac OS Runtime for Java (MRJ) 2.2.3 is an upgrade to MRJ 2.2.2 that improves memory usage, and provides substantial performance improvements for users who repeatedly access the same JAR files over a network. It also fixes several problems which were affecting users of 2-byte international systems. MRJ 2.2.3 is Gold Certified for use with Oracle Applications 11i when used with Microsoft Internet Explorer 5.0. It is Bronze Certified for running applications built with Oracle Developer 6i and deployed on Oracle Developer Server using Microsoft Internet Explorer 5.0 to access the client. Notes • JAR caching MRJ 2.2.3 introduces JAR caching. Java code is frequently stored on servers in a special type of file called a JAR (for Java Archive). If a Java applet uses many JARs, or if the JARs are very large, it can take considerable time to load these files. JAR caching saves copies of these files on your local hard drive. When you use a JAR again, MRJ checks to see if there is a newer version on the server. If not, it uses the local copy, and your application starts up much faster than it would without caching. JARs are saved in a folder named “MRJ Cache” located in “System:Preferences”. Over time, this folder will grow, but it will not exceed 100MB. If you want to reclaim some of this space, you can quit all running applications and then drag the “MRJ Cache” folder to the trash. The next time MRJ needs to cache a JAR file, it will create a new “MRJ Cache” folder. • Microsoft Internet Explorer 5.0 MRJ 2.2.3 fixes several of the more prominent bugs exhibited when using MRJ 2.2 and MRJ 2.2.2 with Microsoft Internet Explorer (MSIE) 5.0; other bugs still remain. Apple is working, along with Microsoft, to resolve these problems, and they will be addressed in a future release. • Yahoo Games If you play Yahoo games in MSIE 5.0, they may crash when you click the “Exit Games” - 1 - button. You can avoid this problem by using MSIE 4.5 to play these games. • MRJ SDK Developers working with MRJ 2.2.3 can continue to use MRJ SDK 2.2. Apple is not releasing a new MRJ SDK with MRJ 2.2.3. You can download MRJ SDK 2.2 from http://developer.apple.com/java/text/download.html. • Personal Web Sharing If you are using Personal Web Sharing, and want to include Java applets in your web pages, you should package your class files in ZIP or JAR format to avoid a bug in Personal Web Sharing that prevents an applet from running if any of its classes have a “$” in their name. For more information on cr…