Custom Annotation

1. Program

//What will be the O/P ? 
@interface F
{
 public String  someMessage();
}

class G
{
 //Annotation
 @F(someMessage="my first method")
 public static void main(String args[])
 {
  System.out.println("hello world");
 }
}

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2. Program

//What will be the O/P ? 
@interface Someinfo{
 public String  someMessage();
}

@Someinfo(someMessage="some desc")
class H
{

 @Someinfo(someMessage="about i")
 int i;

 @Someinfo(someMessage="about con")
 H()
 {
  
 }
 
 @Someinfo(someMessage="about main")
 public static void main(String[] arg)
 {
  System.out.println("Java");
 }
   
}

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3. Program

//What will be the O/P ? 
@interface Counter{
 public int count();
}

@Counter(count=3)
class I
{
 @Counter(count=5)
 int i;

 @Counter(count=10)
 I()
 {

 }
 
 @Counter(count=10)
 public static void main(String[] arg)
 {
  System.out.println("hiiii");
 }
  
}

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4. Program

// What will be the O/P ? 
@interface Test
{
 public String message();
 public boolean flag();
}

@Test(message="some info",flag=true)
class J
{
 @Test(message="attribute",flag = false)
 int i;

 @Test(message="con",flag=true)
 J()
 {

 }
 
 @Test(message="main",flag=true)
 public static void main(String[] arg)
 {
  System.out.println("HEllO world");
 } 
 
}

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5. Program

//What will be the O/P ? 
@interface Ann2
{
 public String message() default "abc";
 public int countValue() ;
}

@Ann1(countValue=9)
class L
{
 @Ann2(someMessage="hello") 
 public static void main(String[] arg)
 {
  System.out.println("HEllO world");
 }
}

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