[Java]--Java static keyword – Class, Method, Variable, Block, import，--javavariable

[Java]--Java static keyword – Class, Method, Variable, Block, import，--javavariable

The Link:http://www.journaldev.com/1365/java-static-keyword-class-method-variable-block-import
1. Java static variable
2. Java static methods
3. Java static block
4. Java static inner class
5. Java Interface static method (above Java 8)