[Java Study Notes] Java definition macros

Author: gnuhpc
Source: http://www.cnblogs.com/gnuhpc/

To define constants in Java, you can use them in the class.
Public static final ....
For example:
Public static final int Pi = 3.14159; // The definition of Java. Lang. Math. Pi is similar.
For example:
Public static final int name = "John ";
.
Static ensures its space efficiency: there is only one copy of a class, and not each object has only one copy.
Final ensures that it will not be modified, so that the compiler can perform some optimization, which is equivalent to ensuring time efficiency.

 

Author: gnuhpc
Source: http://www.cnblogs.com/gnuhpc/