Annotation is something like notes in a program.
JDK 5.0 or any later version supports annortaton.
See Annotation on java.sun.com
@Override
If the method is not properly overridden, then a compile error occurs.
class Super {
void func(){
System.out.println("Super");
}
}
class Sub extends Super {
@Override
int func() {
System.out.println("Sub");
}
}
___________
@Deprecated
Warning of a deprecated method.
public static void main(String[] args) {
func();
}
@Deprecated
static void func() { }
}
___________
@SuppressWarnings("deprecation")
Suppresses the warning of a deprecated method.
@SuppressWarnings("fallthrough")
Suppresses the warning of the fall-through in a switch statement
@SuppressWarnings("finally")
Suppresses the warning that a finally block is not properly finished
@SuppressWarnings("serial")
Suppresses the warning that a serialVersionUID is not defined
When you supress more than one warning, write like this:
@SuppressWarnings({"deprecation", "finally"})
