Ever need to break a string into smaller pieces in Java? In this guide, I walk through exactly how I split a string using Java’s String.split() method—perfect for when you’re parsing something like a date, a CSV line, or a more complex ID (like the invoice number example I use in the code). I start with a string that contains a year, a month, and an ID separated by forward slashes, then I show you how to extract each part cleanly. The key takeaway is that split() takes a delimiter, but that delimiter is actually a regular expression. That’s what makes split() so versatile. I demonstrate splitting on a simple “/”, and I also point out how you can split on patterns like one-or-more whitespace using something like \s+. After split() returns a String array, I access each piece by index (starting at 0) and print the results so you can verify you’re getting the exact output you expect. By the end, you’ll be able to quickly parse and divide strings in Java without overcomplicating it.