Types

• Java has 8 primitive types:
  
  

  byte	float
  short	double
  int	char
  long	boolean

  
  
• Notice that they are all in lower case.
  
  
• By default, whole-number constants are int and decimal-number constants are double.
  
  
• You can only perform mathematical calculations with primitives (more on that later).
  
  
• Notice that strings are not primitive types.
  
  
• A string is a class type (String) - note the capital letter in the name.
  
  
• When you need a new data type, you will create a new class.