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Commonly used packages in java

巴扎黑Original: 2016-12-10 09:42:301479browse

Commonly used packages in java

java.lang package is introduced by the system by default

API: Application Program Interface, application programming interface

In layman’s terms, it is a set of class libraries provided by the system

three of java Version

JSE: java standard version contains the core API of java

JEE: Java Enterprise Edition, which adds javaWEB API on the basis of the standard version

JME: java streamlined version, mainly used for program development of mobile devices

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Commonly used packages in java

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