String, StringBuffer & StringBuilder for JAVA Interviews

The student can get complete knowledge on the following topics:

1. Difference between String and StringBuffer:

          * Mutability Vs Immutability

  * equals() method

2. String Objects Creation: Heap and String Constant Pool(SCP)

3. Importance of String Constant Pool(SCP)

4. Important FAQs on String and StringBuffer

5. Important Constructors of String class

6. Important Methods of String class:

        charAt(), concat(), equals(), equalsIgnoreCase()

        isEmpty(), length(), replace(), substring()

        indexOf(), lastIndexOf(), toLowerCase(), toUpperCase()

trim()

7. Important Conclusions about String Immutability

8. Creation of Our Own Immutable Class

9. final vs immutability

10. Need of StringBuffer ?

11. StringBuffer class Constructors 

12. Important Methods of StringBuffer class:   

      length(), capacity(), charAt(), setCharAt(), append()

      insert(), delete(),  deleteCharAt(),reverse() 

      setLength(), ensureCapacity(), trimToSize() 

13. Need of StringBuilder

14. Differences between StringBuffer and StringBuffer

15. String vs StringBuffer and StringBuilder

16. Method Chaining