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iPhone Q&A - Updated March 15, 2008

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How much storage space does the iPhone operating system occupy?

In an article in MacWorld UK, Greg Joswiak, vice president of worldwide iPod marketing, said that the version of OS X that runs on the iPhone would occupy "considerably less" than half a gigabyte (500 MB).

The version of OS X that shipped on the iPhone on June 29, 2007 occupies approximately 300 MB of space.

Are MacOS X "dashboard widgets" the same as iPhone widgets? Can third-party developers create iPhone widgets?

No doubt there are some technical similarities between MacOS X "dashboard widgets" and the "widgets" on the iPhone. Both likely use DashCode.

However, dashboard widgets written for MacOS X are not compatible with the iPhone. Although the company originally forbid all third-party development, on March 6, 2008, Apple released an official iPhone SDK and third-parties can begin to develop iPhone-compatible widgets as well as applications.

Does the iPhone support Java applications?

Not natively. In fact, in an interview with the New York Times shortly after the introduction of the iPhone, Steve Jobs openly attacked the idea of Java applications on the device, saying "Java's not worth building in. Nobody uses Java anymore. It's this big heavyweight ball and chain."

As as result, as originally published on February 5, 2007, EveryiPod.com speculated that:

With such opposition from Steve Jobs, it is all but certain that the iPhone will never support Java applications or applets.

However, with the introduction of the iPhone SDK on March 6, 2008, Sun Microsystems announced that the company is developing a Java Virtual Machine for the iPhone, intends to "make sure that the JVM offers the Java applications as much access to the native functionality of the iPhone as possible", and will release it free of charge.

This is welcome news for those interested in running Java on the iPhone.

Can the iPhone run Linux?

Yes. Although no official information is available, creative hackers previously developed a version of Linux for the iPod and are hard at work developing a version of Linux for the iPhone as well.

You may wish to track the development progress of Linux for the iPhone at the FiveForty wiki.

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