java - Android: A PendingIntent is a form of an Intent, then why isn't PendingIntent a subclass of Intent? -

java - Android: A PendingIntent is a form of an Intent, then why isn't PendingIntent a subclass of Intent? -

they

generally, when there exists "is-a" relationship between 2 entities, there inheritance relationship in terms of oop.

for illustration

"a mount bike bicycle."

so mountainbike subclass of bicycle well, mountainbike inherits properties of bicycle, , has of own well.

now, speaking pendingintent intent, isn't it? why pendingintent subclass of intent?

reference: developer docs

generally speaking pendingintent intent, isn't it?

a pendingintent can best thought of wrapper around intent, identifying operation performed (start activity, start service, send broadcast) , security context under operation should performed.

hence, "has-a" relationship model reasonable approach here.

java android inheritance android-intent android-pendingintent