5.2. Classes Derived from Java 2 Standard Edition
CLDC provides a number of classes that have been derived from Java 2 Standard Edition (J2SE). The rules for J2ME configurations require that each class with the same name and package name as a J2SE class must be identical to or a subset of the corresponding J2SE class. The semantics of the classes and their methods included in the subset may not be changed. The classes may not add any public or protected methods or fields that are not available in the corresponding J2SE classes.
5.2.1. System Classes
J2SE class libraries include several classes that are intimately coupled with the Java Virtual Machine. Similarly, several commonly used Java tools assume the presence of certain classes in the system. ...
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