You learned about the Pattern class, then worked through examples demonstrating regex constructs, from basic pattern matching with literal strings to ... s appended to a java.lang.StringBuffer ...

Before looking at how Groovy improves on the handling of the regular expression, I round out the Java example that was started above to also include an example of Java’s Matcher class in action ...

The negative here is that the number of lines of code increases from the original string primitives version, which was the initial motivation to use regular expressions. In Java we end up with six ...

The implementation of Java 8 Lambda expressions required an introduction to a number ... perhaps you wanted to strip out all of the non-numeric characters from a String. In that case, a String that ...