Provides classes necessary for the creation of applets and related operations.
java.io
Provides classes for system input and output through data streams, serialization and
fi le manipulation.
java.lang
Provides classes that are default and required for fundamental Java programming.
This package is default and imported to all Java programs.
java.net
Provides classes necessary for implementing networking applications.
java.util
Contains the collections framework and classes, date and time facilities and
miscellaneous utility classes (a string tokenizer, a random-number generator and a
bit ...
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