SCJP official textbook Chinese version of the study note "131104"

Java.lang contains some classes that form the core of the language, such as String , Math , Integer and the Thread .

java.awt contains a toolkit for composing abstract windows ( AWT class, the package is used to build and manage the graphical user interface of the application.

Java.applet contains the executable applets a class of special behaviors.

The java.net contains classes that perform network-related operations and classes that handle interfaces and Uniform Resource Locators (URLs) .

The java.io contains classes that handle I/O files.

Java.util contains the utility classes that are set up for a task, such as random number occurrences, defining system attributes, and using functions related to date calendars.

Java Common commands: (slightly)

Use of the API: (Self-check)

SCJP official textbook Chinese version of the study note "131104"