Complete Java SE 8 Developer Bootcamp - Immutable Strings

The video tutorial explains the concept of string immutability in Java, highlighting that once a string is created, it cannot be changed. It discusses the implications of string concatenation on memory and performance, emphasizing the role of garbage collection. The tutorial compares StringBuilder and StringBuffer, noting that StringBuffer is thread-safe but slower. Practical examples are provided to illustrate these concepts, along with tips for exams.

What happens to the original string when a method like 'toUpperCase' is called?

What does it mean for a string to be immutable in Java?

Discuss the performance implications of having many unreferenced string objects in memory.

Explain the difference between StringBuilder and StringBuffer.

In what scenarios should a developer prefer using StringBuilder over StringBuffer?

Why is it important to capture the return value when calling methods on strings?

How does Java optimize string concatenation, and what should developers do for extensive concatenation?