Update: J2SE gets makeover with 1.5 upgrade

IDG News Service - Sun Microsystems Inc. has released a beta version of the next release of Java 2 Standard Edition (J2SE), a set of specifications used for creating desktop applications and which also form the basis of Java development tools from Sun and its partners.

Sun described the upgrade, developed under the code name Tiger, as the latest major revision to the Java platform. It implements dozens of changes, many of which focus on making the Java programming language easier for developers to use.

A beta release of the upgrade, called J2SE 1.5, was released Wednesday for download at Sun's Java Web site. The final version is expected by around out by the middle of the year. It consists of two parts -- a software development kit and a Java runtime environment.

While Sun's Java software has been widely adopted on server computers, its use on the desktop has been more limited. Nevertheless, J2SE is important because it provides the foundation for Java 2 Enterprise Edition (J2EE), the server version of Java. Some of the new features will also trickle down to Java 2 Mobile Edition (J2ME), used for portable devices such as cell phones.

Along with making Java easier to program with, the upgrade focuses on issues that are important for enterprise use such as performance, scalability and security. It also adds support for Advanced Micro Devices Inc.'s 64-bit Opteron chips for servers running Windows 2003 and SuSE Linux AG's version of Linux.

Altogether, the upgrade implements 15 Java Specification Requests, which are suggestions for extending and improving Java that pass through the multivendor Java Community Process. There are also dozens of minor changes.


One of the most significant additions is support for generic types in the Java language, said Java creator James Gosling, a Sun fellow and the chief technology officer of its developer products group. Generics should reduce the amount of code that developers have to write and also makes it easier to identify bugs earlier in the development cycle.

How to implement generics has been debated since Java's introduction. "I was reluctant to put something in where, no matter how you did it, 90% of people would come around and beat you up. So Java came out without generics," Gosling said.

It almost made it into the J2SE 1.4 release, but the Java tools vendors needed more time to prepare and so it was pushed back, Gosling said. He is satisfied now that generics have been implemented in a way that's efficient and carries little overhead. "Most people should

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