Difference between String, StringBuffer, StringBuilder 2026

In this detailed Java tutorial, learn the real difference between String, StringBuffer, and StringBuilder — one of the most important and frequently asked Java interview questions! We’ll cover everything from mutability, thread safety, and performance, to when and why to use each one in your Java programs. In This Video, You’ll Learn: Introduction What is a String in Java? (Immutable Explanation) What is StringBuffer? (Mutable & Thread-Safe) What is StringBuilder? (Mutable & Fast) Internal Working and Memory Behavior Performance Comparison: String vs StringBuffer vs StringBuilder Which one to use in real projects? Summary and Interview Tips Key Concepts Explained: • Immutability in Java Strings • How StringBuffer achieves thread safety • Why StringBuilder is faster • Real-world performance benchmarks Summary: String: Immutable, safe, slower StringBuffer: Mutable, thread-safe, medium speed StringBuilder: Mutable, fast, single-threaded Perfect for: Java beginners, interview preparation, and developers who want to write efficient code. Subscribe to Analyst Adda for more Java tutorials, coding shorts, and interview-ready content. #Java #String #StringBuffer #StringBuilder #JavaTutorial #JavaInterviewQuestions #MutableVsImmutable #CodingShorts #JavaProgramming #AnalystAdda