I found that using Java to make mobile development is really a very "money" work.
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Chinese Mobile Operator Hedges Bets with Java
Is The Key to Downloads Going to Be Java, Brew, Something Else - Or 'D': All of the Above?
China Unicom Plans To Distribute Mobile Phone Downloads Using A Version of Java, A Deal That Could Influence How Other Carriers Sell Games, Ring Tones or Business Applications.
In the past, the Chinese company has used Binary Runtime Environment for Wireless (BREW) software to deliver over-the-air downloads to subscribers. As a major carrier, it has been one of the largest feathers in the cap of BREW creator and licenser QUALCOMM.