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What is midp and cldc?
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What is midp and cldc?
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J2me is a limited java language which allows us to develop applications for the mobile.
A profile is a set of domain-specific classes added to a configuration to support a specific device.
For example, MIDP (Mobile Information Device Profile) is the profile added to the configuration CLDC. MIDP profile works only on mobile phones, and PDAP(Personal Digital Assistant Profile ) works only on palmtop computers. So each profile is device specific.
There are two versions of midp, MIDP 1.0 and MIDP 2.0
A configuration is the Java runtime environment(or JRE), It consists of three things:
* Java virtual machine (VM) for executing the Java byte code.
* Native assemble language code to interface with the underlying hardware.
* Java runtime classes.
There are two types of configurations in j2me, CLDC and CDC
CLDC is Connected Limited Device Configuration,
CDC is Connected Device Configuration,
Connected Device Configuration (CDC){
• 512 kilobytes (minimum) memory for running Java
• 256 kilobytes (minimum) for runtime memory allocation
• Network connectivity, possibly persistent and high bandwidth
Connected, Limited Device Configuration (CLDC)
• 128 kilobytes memory for running Java
• 32 kilobytes memory for runtime memory allocation
• Restricted user interface
• Low power, typically battery powered
• Network connectivity, typically wireless, with low bandwidth and intermittent access
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