Strings in Java:


I. Introduction to Strings

A. What is a string?

B. The importance of strings in programming

C. Immutability of strings


II. Creating and Initializing Strings

A. Creating strings using string literals

B. Creating strings using the new keyword

C. Converting other data types to strings

D. String constructors and methods for initialization


III. String Manipulation

A. Concatenation

B. Substring extraction

C. Searching and replacing characters

D. Changing case

E. Splitting and Joining Strings

G. Comparing strings


IV. Regular Expressions and String Validation

A. Introduction to regular expressions

B. Pattern matching with regular expressions

C. String validation using regular expressions


V. StringBuilder and StringBuffer

A. Introduction to mutable string objects

B. StringBuilder class

1. Creating and initializing StringBuilder objects

2. StringBuilder methods for string manipulation

3. Performance advantages of StringBuilder

C. StringBuffer class

1. Similarities to StringBuilder

2. Differences and use cases

3. Thread-safety of StringBuffer


VI. String Formatting

A. Introduction to string formatting

B. The java.util.Formatter class

C. Formatting numbers, dates, and other data types