To minimize runtime memory, consider the following guidelines:

• Use primitive types (such as int or Boolean) instead of objects (such as String or Integer).
• Do not depend entirely on the garbage collector.
• Avoid creating many objects quickly.
• Set object references to null when you are finished using them.
• Reuse objects as much as possible.
• Move heavy processing to the server. For example, you can filter or sort data before sending it to the BlackBerry smartphone.