www.pudn.com > ThinkinginJava4thEdition(SourceCode).zip > SimulatingNull.java

//: annotations/SimulatingNull.java 
import java.lang.annotation.*; 
 
@Target(ElementType.METHOD) 
@Retention(RetentionPolicy.RUNTIME) 
public @interface SimulatingNull { 
  public int id() default -1; 
  public String description() default ""; 
} ///:~