At the heart of Java 2 Micro Edition ( J2ME) are three core concepts: configurations, profiles, and optional packages. You can' t write a J2ME application. JAR ( Java archive) file - The JAR file contains Java classes for each MIDlet in the suite and Java classes that are shared between MIDlets.
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The JAR file also contains. lcdui Description.
Given the capabilities of devices that will implement the MIDP and the above requirements, the MIDPEG decided not to simply subset the existing Java UI, which is the. It is up to the implementation to free the used resources when the Java objects are not needed anymore.