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  Strings are needed in many programming tasks. Much of the information that identifies a person must be stored as a string: name, address, city, social security number, etc. This lesson covers the specifications of the String class and how to use it to solve string-processing problems. 
  The key topics for this lesson are: 
  
    - The String Class
 
    - String Constructors
 
  - Object References
 
  - The null Value
 
  - String Query Methods
 
  - String Translation Methods
 
  - Immutability of Strings
 
  - Comparing Strings
 
  - Strings and Characters
 
  - The toString Method
 
  - String I/O
 
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