Lovepreet S (Java Experts) ☁️

A Roadmap to become JAVA backend developer. 🧵👇

In Action Integer num1 = 50; Integer num2 = 50; System.out.println(num1 == num2); // true (pooled!) Integer num3 = 150; Integer num4 = 150; System.out.println(num3 == num4); // false (not pooled!)

The Tricky Part: == vs .equals() This is where == gets tricky! == checks if two references point to the exact same object. For numbers in the pool, they often do. Outside the pool, even if values are identical, they're separate objects. Always use .equals() for value comparison

Try this 🤔 Integer a = 100; Integer b = 100; System.out.println( a == b) // true Integer x = 200; Integer y = 200; // false you know why?! #Java #Programming 👇

Key Takeaways: Java's String Pool reuses literals. new String() always creates new objects. intern() forces pooling. == vs .equals() is crucial for comparison

Classic Gotcha: `==` vs `.equals()` Comparing user input (often dynamically created Strings) with constant literals using == will likely fail! ❌ Always use .equals() for content comparison. Remember: == for reference, .equals() for value.

Ever wonder why "hello" == "hello" is true, but new String("hello") == new String("hello") is false? Let's unravel this 👇 The String Pool

Q: How do you share variable in thread life cycle? A: Java ThreadLocal class allows the storage of data that is specific to each thread separately. It is often used to implement thread-specific context or to avoid synchronisation for thread-local data

@vikasrajputin @DThompsonDev This is great advice.

Find a good senior in your workplace, spent time with them, ask your technical doubts, discuss concepts with them, literally observe how they're doing what they're doing. You'll grow 10x just by observing and following a Good mentor. This is what I literally did to grow in my early days.

What advice would you give to someone who is about to start their first job in tech working at a company?

@dolapo_47 Lets break the threads together

@java_experts Threads 😢

What do you think most difficult/complex topic in JAVA ?

@vvicazz Most common answer 😀

@java_experts Multithreading

@Shubh28659122 True, Threads are a bit complicated, but if you understand the concept, they're a lot of fun.

@java_experts Well, threads are such concepts which depend on core.

@AmosSohan True, Threads are tricky, Dp is really a thing

@java_experts DP , threads .

@VirtualCoder20 haha !! Thread are little bit tricky

@java_experts Aa that's easy. Threads and Godamn Threads