Comparison between static code blocks and {} code blocks. Comparison between static code blocks

Comparison between static code blocks and {} code blocks. Comparison between static code blocks

Example 1:

Public class StaticDemo {System. out. println ("{} code block");} static {System. out. println ("static code block");} public static void main (String [] args ){}}

Static code blockView Code

Conclusion: static code blocks are executed when classes are loaded, but {} code blocks are not executed.

Example 2:

Public class StaticDemo2 {System. out. println ("{} code block");} static {System. out. println ("static code block");} public static void main (String [] args) {new StaticDemo2 ();}}

Static code block {}View Code

Conclusion: For a new class, the static code block is executed before the {} code block is executed.

Example 3:

Public class StaticDemo3 {public StaticDemo3 () {System. out. println ("constructor");} {System. out. println ("{} code block");} static {System. out. println ("static code block");} public static void main (String [] args) {new StaticDemo3 ();}}

Static code block {} code block ConstructorView Code

Conclusion: For a new class, the static code block is executed first, the {} code block is executed, and the constructor is executed finally.