Method annotation
In this chapter you will learn:
Annotation for method
The following code gets a method from its class
by using getMethod and pass in
myMeth.
Then it gets annotation by annotation class name.
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.reflect.Method;
/*from ja va 2s . c o m*/
@Retention(RetentionPolicy.RUNTIME)
@interface MySingle {
int value(); // this variable name must be value
}
public class Main {
@MySingle(100)
public static void myMeth() {
Main ob = new Main();
try {
Method m = ob.getClass().getMethod("myMeth");
MySingle anno = m.getAnnotation(MySingle.class);
System.out.println(anno.value()); // displays 100
} catch (NoSuchMethodException exc) {
System.out.println("Method Not Found.");
}
}
public static void main(String args[]) {
myMeth();
}
}
The code above generates the following result.
Next chapter...
What you will learn in the next chapter:
- Locale class
- How to use Locale to set date format for a country
- Sets the default locale for this instance of the Java Virtual Machine