Java Streams: Transform Your Data Into Useful Analytics With collectingAndThen() Sometimes, it isn't good enough just to collect data. It's often the case that you need to take that collected data and transform it into something useful.
Java Streams: Create Pivot Tables That Highlight Important Info Sometimes, you gotta crunch the numbers yourself and put them in a report that makes everything look pretty. You can do that with pivot tables.
Java Streams: Categorize Your Data Into Meaningful Insights With Collectors.groupingBy() Sometimes it isn't good enough just to present data. You also have to categorize it.