Common packages and Functions in Java

1. Java.awt: Provides drawing and image classes, mainly used to write GUI programs, including buttons, tags and other common components and corresponding event classes.

2. Java.lang:java language Pack, is the core package, the default import into the user program, the package has the object class, the data type wrapper class, the mathematical class, the string class, the system and the runtime class, the Operation class, the threading class, the error and the exception handling class, the procedure class.

3. Java.io: Contains classes that provide multiple output input functions.

4. Java.net: Contains classes that perform network-related, such as Url,scoket,seversocket.

5. Java.applet: A class that contains Java applets.

6. Java.util: Contains the collection framework, legacy collection classes, event models, date and time facilities, internationalization and various utility classes (string tag generator, random number generator and bit array, date dates class, Stacks stack class, Vector vectors class, etc.). The collection class, the time processing mode, the date Time tool and so on each kind of common tool pack.
7. Java.sql: Provides an API to access and process data stored in a data source (typically a relational database) using the JAVATM programming language.

Common packages and Functions in Java