Summary of foundation and experience of Java Foundation

Source: Internet
Author: User

Through the study of the preparatory course, let me initially understand a little bit of programming knowledge, I feel that the char type in Java can be directly within the 2 byte range of integer conversion. In C #, the error is directly.

Understanding C # is helpful for learning.

There are eight basic types of 1.Java: Byte,short,int,long,float,double,char,boolean. These sizes are not related to the underlying operating system.

Variables in 2.Java are either eight basic types or reference types.

The declaration of a constant in 3.Java should be final.

4. A valid identifier cannot make a keyword, it must start with a character or underscore or dollar sign, can include a number, but cannot start with a number.

Summary of foundation and experience of Java Foundation

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