How does the Collectors.teeing() work? - Cracking the Java Coding Interview #javacoding #javatips

Explains how the Collectors.teeing() method works in Java, introduced in JDK 12. The teeing collector applies two separate collectors to the same stream simultaneously, producing two intermediate results that are then merged via a merging function. This is particularly useful when you need to run two different algorithms on a stream without iterating through it twice, which is critical for single-pass sources like I/O streams where buffering everything in memory is not feasible.