第五十五道Java小问题

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


@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@interface TestAnnotation {
 public int id() default 5;
 public String description();
}
class Anno {
 @TestAnnotation(id = 6, description = "G")
 public void g() {
 }
 @TestAnnotation(id = 7, description = "I")
 protected void i() {
 }
 @TestAnnotation(id = 8, description = "F")
 void f() {
 }
 @TestAnnotation(id = 9, description = "H")
 private void h() {
 }
}
public class Test {
 public static void main(String[] args) {
  Method[] methods = Anno.class.getMethods();
  for (Method m : methods) {
   TestAnnotation a = m.getAnnotation(TestAnnotation.class);
   // System.out.print(m.getName());
   if (a != null)
    System.out.print(a.id());
  }
 }
}

 

 

请问以上程序的输出是: