Task1_Main.java

package Task1;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * Created by andrew on 04.04.17.
 */
public class Main {
    public static void main(String[] args) throws InvocationTargetException, IllegalAccessException {
        Class<?> cls = New.class;
        Method[] methods = cls.getMethods();
        for (Method method : methods) {
            if(method.isAnnotationPresent(Test.class)){
                Test t = method.getAnnotation(Test.class);
                System.out.println(method.invoke(null,t.a(),t.b()));
            }
        }
    }
}
class New{
    @Test(a=2,b=5)
    public static int test(int a, int b){
        return a+b;

    }
}

Task1_Test.java

package Task1;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Created by andrew on 04.04.17.
 */
@Target(value = ElementType.METHOD)
@Retention(value = RetentionPolicy.RUNTIME)
public @interface  Test {
    int a();
    int b();
}