What does the @ sign means in java?

Question

Below is the code snippet.

@Intercepts({@Signature(
type= Executor.class,
method = \"update\",
args = {MappedStatement.class,Object.class})})
public class
<         


        

Answer 1

It's an annotation.

Here's more information on it: http://www.alden-java-hosting.com/JAVA-tutorial/java/javaOO/annotations.html

Here are Oracle's docs since it looks like the other link is down: http://docs.oracle.com/javase/tutorial/java/annotations/