Category : Tutorials » Java J2ME
J2ME application saves and retrieves data using the Record Management System . J2ME applications . A CDC-based J2ME application interacts with .
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Java J2ME
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A J2ME application saves and retrieves data using the Record Management System (RMS), which is discussed in the previous chapter. Applications running onboth Connected Limited Device Configuration (CLDC) and Connected Device Configuration (CDC) devices use RMS for local data management. J2ME applicationsthat run on CDC devices are also capable of utilizing a relational database managementsystem (DBMS), which provides industrial-strength database management service to theapplication. The DBMS is typically located on a server connected to the device over anetwork, although some CDC devices might have the DBMS stored locally on a hard drive. As you’ll recall from Chapter 1, CLDC devices usually have between 160KB and 512KB of available memory and are battery powered. They also use an inconsistent,small- bandwidth network wireless connection and may not have a user interface.CLDC devices use the KJava Virtual Machine (KVM) implementation, which is astripped-down version of the JVM. CLDC devices include pagers, personal digitalassistants, cell phones, dedicated terminals, and handheld consumer devices withbetween 128KB and 512KB of memory.