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How to Actually Use Modern Java Like a Pro 🚀
🔒 This is a Medium member-only article. If you’re not a Medium member, you can read the full article for free on my blog: How to Use Modern Java Like a Pro.
Java has been around since 1995, and yet, it’s still going strong. While many developers complain about Java being too verbose or outdated, the truth is — Java has evolved. If you’re still writing Java like it’s 2005, you’re missing out on the features that make modern Java cleaner, smarter, and way more productive.
So, if you’re ready to stop writing boilerplate code and start coding like a modern Java pro, this article is your guide.
Step 1: Use the Latest LTS Version
Before diving into features, make sure you’re using a modern Java version.
âś… Recommendation: Use Java 17 or Java 21 (both are Long-Term Support versions).
Why? Because these versions include:
- Lambdas and Streams
varfor local type inference- Records, Sealed Classes, Pattern Matching
- Virtual Threads (from Java 21)
- Better performance and garbage collection
Step 2: Embrace the Power of var
Introduced in Java 10, the var keyword allows local variable type inference. It reduces boilerplate and makes code more readable when the type is obvious.
Example:
// Before
Map<String, List<String>> map = new HashMap<>();
// Modern Java
var map = new HashMap<String, List<String>>();It keeps your code cleaner and less repetitive, especially with generics.
Demo
⚠️ Use it wisely: Don’t use
varwhen the type is unclear or makes the code harder to read.
