The first one
Enum defines a class, so I can use it just like any normal class: create constructor, add methods, fields and so on. For example:enum BeadType {
ROUND_BEAD(10, 10),
CYLINDRIC_BEAD(10, 15),
OTHER_BEAD(20, 20);
private final int width;
private final int height;
BeadType(int w, int h) {
this.width = w;
this.height = h;
}
public int getW() {
return width;
}
public int getH() {
return height;
}
}
I really like it.
The second one
Annotations. I suppose, that almost everyone has at least once used @Override annotation. But did you know that you can create your own type of annotation and even make it to be documented in your Javadoc-documentation (just add @Documeted before your own annotation definition). I was surprised!
@Documented
@interface MyAnnotation {
String myName();
int myAge();
String email();
}
@MyAnnotation(
myName = "Nastya",
myAge = 20,
email = "zminyty@gmail.com")
