MySingle.java Source code

Introduction

Here is the source code for MySingle.java

Source

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.reflect.Method;

@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();
    }
}