#4_arrays_notes.txt

arrays: stores sequence of same-type values;
        can be used for primitive data types and classes;

        '<dataType>[] <arrayName>;' or '<dataType> <arrayName>[];' - no specification of size;

        declared as: <dataType> <arrayName>[] = new <dataType>[<size>];
                     ex: int[] integerArray = new int[10];

        once instantiated, size cannot be changed;

        without specifying number of elements: <dataType>[] <arrayName> = new <dataType>[] {<elementsOfArray>};
        valid declaration and initialization: <dataType>[] <arrayName>;
                                              <arrayName> = new <dataType>[] {<elementsOfArray>};

        anonymous array: <dataType>[] <arrayName> = {<elementsOfArray>};
                         cannot be used for initialization in a statement outside a declaration statement;

// ~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*

enhanced for loop: for (declaration : collection) {}
                   declaration: includes type and variableName (usually local variable with same type as arrayElement)
                   collection: array (or some other collection variable)

                   every value of the array passed as collection is stored in declaration for subsequent iterations

// ~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*

helper class: java.util.Arrays (static methods)
              inherits from java.util.Object

import java.util.Arrays;
           +
Arrays.toString(<array>) returns string of array memmbers; format: in square brackets, comma-delimited - [a, b, c, ...]

declaring an array of different types: Object[] <arrayName> = new Object[<size>];

all variables are references