From a9f8fa7ea48fdb4ac73a4218cacfc44732ee9554 Mon Sep 17 00:00:00 2001
From: Suraj Sadhula <sadhula.suraj106@gmail.com>
Date: Sun, 6 Apr 2025 19:50:47 +0530
Subject: [PATCH] [Suraj] Few Java tips that I found useful/helpful in
 day-to-day work.

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+Useful Java Tips  
+
+1. String.join() 
+When you need to concatenate collections or arrays with a delimiter, 'String.join()' makes the task simple and clean—similar to '.join' in Python.  
+Example:  
+ 
+List<String> words = Arrays.asList("Java", "Spring", "React");  
+String result = String.join(", ", words);  
+System.out.println(result); // Output: Java, Spring, React  
+
+Great for handling strings without manual loops or conditional checks.  
+
+----------------------------
+
+2. 'var' in Java  
+Java 10 introduced 'var' for compile-time type inference. Unlike Python’s dynamic typing, 'var' relies on the compiler to infer the type from the assignment.  
+Example:  
+var name = "Leetcode"; // inferred as a String 
+ 
+In Python, 
+x = 10 //int 
+x = "Hello" //now str
+But Java’s 'var' is not like this— it’s type-safe.  
+
+**Best Practices**:  
+-> We can use 'var' when the type is obvious from the right hand side.  
+  Example:  
+  for (var entry : map.entrySet()) {  
+      System.out.println(entry.getKey() + " -> " + entry.getValue());  
+  }  
+
+-> Avoid using 'var' when the type is ambiguous, as it may hurt readability. 
+
+Not recommended 
+var data = getData(); //what kind of data type?