How to check part of a string?

[Knute Snortum]

soneand pap wrote:In Python the things are easier and i thought if i wrote it in Python I could change it back to java.  

Writing a short script is definitely easier in Python, but when you write big projects you are going to want to organize your code into classes and packages.  I'm sure Python has a way to do that, but I bet it get about as complicated as Java.

Writing in Python and converting to Java is not the way you always want do your development.  Java and Python are quite different.

[Jay Rex]

Liutauras Vilda wrote:Jay Rex, when I started reading this your post, I gave you a cow, when I was near the end of reading it, I decided to give you another 2 just because how good the post was/is. And then assigned yet another cow for some other post - you were really helpful in this thread. Keep doing such a great job!

Thank you very much for all the encouragement

[Hemendra Singh Tnh]

You need to collect the second stream and store all its values in some adapted data structure.

For example using a Set:

Set<String> secondSet = second.collect(Collectors.toSet());
List<String> f = first.filter(s -> secondSet.contains(s))
                     .collect(Collectors.toList());

[Campbell Ritchie]

Welcome to the Ranch

[salvin francis]

Hemendra Singh Tnh wrote:You need to collect the second stream ...

Welcome to coderanch, I fail to see how the streams code you pasted has any context in our current discussion about splitting a mac address based on ":". Please also ensure that you quote your sources when copy-pasting content from other websites.