Motorola J2ME Specifications download pdf (Page 23)

Application Management

• MIDlet Suite Version

• The number of MIDlets in the MIDlet Suite

• The Data Space (MIDlet suite resources).

• Program Space (Unpacked JAR)

Note: This image reflects a 176 x 220 display for document readability purposes only. The

C370, C450, and C550 maintain a 96 x 64 display.

MIDlet Suite Installation

Installation of MIDlet suites can occur from the Java Settings menu or the Browser. A

MIDlet Suite must be installed before any of its MIDlets can be executed. Installation

involves extracting the classes from the JAR file and creating an image that will be placed

into Program Space. The resources are then extracted from the JAR file and placed into

Data Space. The JAR file is then removed from the device, thus freeing up some Data

Space where it was originally downloaded.

The space savings from removing the JAR file is one advantage of installation, but

perhaps an even greater advantage is that class loading is not done during run time. This

means that a MIDlet will not experience slow-down when a new class is accessed. Even

further, the MIDlet will not have to share the heap with what has been loaded from the

JAR file. The figure below shows the Java Settings screen.

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Motorola J2ME Specifications Page 23