What does this sign exactly mean? |=

Question

|=

I\'m curious to learn about this operator, I\'ve seen this notation used while setting flags in Java.

for example:

notification.flags |=         


        

Answer 1

It is equivalent to

notification.flags = notification.flags | Notification.FLAG_AUTO_CANCEL;

where | is bitwise OR operator which OR the two variables bit-by-bit.

It is well known by itself. There are also +=, -=, *=, /=, %=, &=, ^=.