simple regex

This should be a simple question.

How do i check if a particular single DOESNOT contains a word?

for example:
String string1 = "one, two ABC end";
String string2 = "two, four abcd end";

and letz say i only want stirng's which doesnt contain "ABC" (note:
case-senitive).. what would be the regex for the same?

Many thnx in advance:)



























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