The CLDC Configuration handles the following areas:

• Java Language y Virtual Machine characteristics
• Java core libraries
• Input / Output
• Communication
• Security
• Internationalization

A Java ME configuration specifies a subset of the characteristics that are supported by the Java language, a subset of functions of the JVM configuration, network, security, installation and several other programming APIs.

CDLC is the base one or several profiles. A profile defines an additional set of APIs and characteristics for a specific device.

If we compare CDLC with Java SE, we will see that there are several restrictions over the CDLC Configuration:

• It does not support floating point operations
• You can’t finalize objects
• There are limitation on the error handling
• It does not implement Java Native Interface (JNI)
• It does not support reflection