Answer by xitter for How do I go through 2 list and check if the content of one element in the same as another element in a different list?

When you do

actors.get(z).getName() == movieActors.get(n).getName()

I suppose name is a string, in that case it will not be true for same names. You need to do

actors.get(z).getName().equals(movieActors.get(n).getName())

Refer this - How do I compare strings in Java?