Java Core API Plan

The eleven principles that Java core API needs to master are as follows:

1. Flexible use of functions of more than 80% of the classes under the java.lang package.

2. The flexible use of more than 80% of the classes under the java.util package, especially the collection class system, regular expressions, time, attributes, and Timer.

3. The use of more than 60% of the classes under the java.io package, Understand the design ideas of the IO system based on the pipeline model and the characteristics and usage scenarios of commonly used IO classes.

4. 100% of the content under the java.math package.

5. More than 60% of the contents of the java.net package are familiar with the functions of each class.

6. More than 60% of the content under the java.text package, especially various formatting classes.

7. Mastering the core Java API requires proficient use of JDBC.

8. More than 40% of the content in the java.security package. If there is no contact with security, it is impossible to master java.

9. The basic content of AWT, including various components Events, listeners, layout managers, common components, printing.

10. The basic content of Swing is similar to the requirements of AWT.

11. XML processing, familiar with the advantages and disadvantages of SAX, DOM and JDOM and can use one of them to complete XML parsing and content processing.

Here are the eleven principles you need to know about the Java core API.