| Today the calculation is all over the world. All kinds of electronic products, including intelligent handset , PDA , Web-TV, domestic information electric appliances, and so on. They could calculate any time any where. This is an extraordinary wider, rich and colorful field, of which the facilities are of great diversification and all in the network. As a result the multiplatform and network function of the Java are of great use to it, that is the J2ME.Java 2 Platform, Micro Edition (J2ME) provides the developers great tools, that it transplants the characteristics of the centralized network and platform agnosticism of the Java to the limited memorizer and limited processor device. The Sun defines the J2ME as: a kind of highly optimized Java run environment, aiming at the comprehensive consumptive products. After the announcement in the Java One Developer Conference 1999.6, the J2ME has entered into the minitype facility developing.Firstly, the paper introduces the technologies of Java such as J2EE, J2SE and J2ME, especially the system structure of the J2ME and the basic concepts: Connected Limited Device Configuration (CLDC), Connected Device Configuration (CDC), as well as the corresponding virtual machines: CVM (C Virtual Machine) and KVM (K Virtual Machine). Besides it gives detailed discrimination to the nondescript configurations and profiles, mainly focusing on the MIDP (Mobile Information Devices Profile). The... |
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