Array Types

• An array variable must usually be declared and created:

  int states[] ; // variable declaration
  

and then:

states = new int[128] ; // array creation

• These can be combined:

  int states[] = new int[128] ;
  

• Alternative (better?) syntax for declaration:

  int[] states ;
  

• The array states can be subscripted by integers from 0 to 127. Subscripts are checked at runtime: states[-1] or states[128] will generate exceptions.

• Array length is given by the length instance variable:

  int len = states.length ; // assigns len = 128.
  

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