java对注解的反射

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

@Retention(RetentionPolicy.RUNTIME)
@interface MyAnno {
  String str();

  int val();
}

public class MainClass {

  @MyAnno(str = "Annotation Example", val = 100)
  public static void myMeth() {
    MainClass ob = new MainClass();

    try {
      Class c = ob.getClass();

      Method m = c.getMethod("myMeth");

      MyAnno anno = m.getAnnotation(MyAnno.class);

      System.out.println(anno.str() + " " + anno.val());
    } catch (NoSuchMethodException exc) {
      System.out.println("Method Not Found.");
    }
  }

  public static void main(String args[]) {
    myMeth();
  }
}