We know that J2ME's universal connection framework provides us with HTTP / Socket / Data News / Local file / line-like connection, but due to differences in program development due to specific equipment implementation. For example, there is no specified socket in the MIDP version 1.0 of J2ME, but the MIDP 2.0 Socket has become a protocol that must be implemented. Therefore, there is no Socket connection in most popular devices at this stage, which gives us a unfavorable factor.
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Discussion on Performance of J2ME Network Application
