The extent to which the Java core API needs to be mastered

Category: Java technology 2009-08-29 01:03 213 people read reviews (0) favorite report Javaapiswingxmlio

Java's core API is very large, which gives developers a lot of convenience, often people have comments, Java makes programmers become silly.

But some of the content I think must be mastered, otherwise it can not be skilled use of Java, will not be used is difficult to do.

1, Java.lang under the package of more than 80% of the functions of the flexible use of the class.

2, Java.util under the package of more than 80% of the flexible use of the class, especially the collection system, formal expression, time, attributes, and timer.

3, the use of more than 60% of the class under the Java.io package, understanding the IO system based on the pipeline model design ideas and commonly used IO class characteristics and applications.

4, the contents of the Java.math package of 100%.

5, java.net under the package of more than 60% of the content, the function of each class is more familiar.

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

7, skilled use of JDBC.

8, java.security more than 40% of the content, if the security has no contact, it is impossible to master Java.

9, the basic content of AWT, including various component events, listeners, Layout manager, common components, printing.

10, the basic content of swing, and the requirements of the AWT similar.

11, XML processing, familiar with the advantages and disadvantages of sax, Dom and Jdom, and can use one of the completion of XML parsing and content processing.

The extent to which the Java core API needs to be mastered