Oracle set to merge Java virtual machines

The plan to meld HotSpot with JRockit is evolving, and a single JVM based on both technologies is expected within two years

Oracle's plan to merge the Sun HotSpot Java Virtual Machine with the JRockit JVM is still evolving, but a single JVM based on both technologies is expected in 18 months to two years, an Oracle official said during a Webcast this week.

Asked about the company's plans to mix the JVMs during the Oracle Webcast, Mark Reinhold, Oracle's principal engineer and a holdover from Sun, said the company would continue to develop both platforms in the short term. A JVM enables running of Java programs and provides Java's heralded hardware and operating system independence.

Oracle expressed intentions to integrate the two JVMs during a Sun-Oracle roadmap session last month. Oracle had acquired JRockit when it bought BEA Systems two years ago.

"It's not an easy problem taking the best of each, figuring out what the long-term convergence plan is," said Reinhold. "We're not going to just stop doing one of them. Customers have things in production on both, taking advantage of specific features in both. We're not going to cause an earthquake and make systems fall over," he said.

"At some point in time, I expect there will be one VM," Reinhold said. He gave an estimated timeframe of one-and-a-half years to two years for this to happen.

The two JVMs are distinguishable from each other, said Reinhold. "There's stuff in JRockit that, frankly, we've been jealous of for some years," Reinhold said. "The mission control stuff is very sweet."

HotSpot, meanwhile, has an advantage in pushing of performance, said Reinhold. "Our sense with the HotSpot code, especially the server compiler, is there's a lot more head room there. It's a lot more-sophisticated system," he said.

Reinhold speculated the merged VM could have the JRockit garbage collector and serviceability, the HotSpot runtime compiler and a mixed runtime system. "It's been fascinating to learn more about JRockit over the last couple of months. It really is a world-class VM," said Reinhold.

The plan to mix the two JVMs for the short and long terms has been "the subject of many recent meetings," Reinhold said.

Also during the Webcast, Reinhold touted the planned Java Development Kit 7, which serves as the next version of the standard edition of Java. He cited its modularity and multilingual capabilities as well as intentions to make it a more productive platform and have it scale down to small devices.

Java platform developers intend to incorporate efforts from Project Coin, which pertains to small language changes, into JDK 7, Reinhold noted.

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.

Tags OraclejavaSun Mircosystemsvirtual machines

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Paul Krill

InfoWorld
Show Comments

Cool Tech

Bang and Olufsen Beosound Stage - Dolby Atmos Soundbar

Learn more >

Toys for Boys

ASUS ROG, ACRONYM partner for Special Edition Zephyrus G14

Learn more >

Nakamichi Delta 100 3-Way Hi Fi Speaker System

Learn more >

Sony WF-1000XM3 Wireless Noise Cancelling Headphones

Learn more >

Family Friendly

Mario Kart Live: Home Circuit for Nintendo Switch

Learn more >

Philips Sonicare Diamond Clean 9000 Toothbrush

Learn more >

Stocking Stuffer

Teac 7 inch Swivel Screen Portable DVD Player

Learn more >

SunnyBunny Snowflakes 20 LED Solar Powered Fairy String

Learn more >

Christmas Gift Guide

Click for more ›

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Tom Pope

Dynabook Portégé X30L-G

Ultimately this laptop has achieved everything I would hope for in a laptop for work, while fitting that into a form factor and weight that is remarkable.

Tom Sellers

MSI P65

This smart laptop was enjoyable to use and great to work on – creating content was super simple.

Lolita Wang

MSI GT76

It really doesn’t get more “gaming laptop” than this.

Jack Jeffries

MSI GS75

As the Maserati or BMW of laptops, it would fit perfectly in the hands of a professional needing firepower under the hood, sophistication and class on the surface, and gaming prowess (sports mode if you will) in between.

Taylor Carr

MSI PS63

The MSI PS63 is an amazing laptop and I would definitely consider buying one in the future.

Christopher Low

Brother RJ-4230B

This small mobile printer is exactly what I need for invoicing and other jobs such as sending fellow tradesman details or step-by-step instructions that I can easily print off from my phone or the Web.

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?