// both are valid declarations

int intArray[]; 
or int[] intArray; 

byte byteArray[];
short shortsArray[];
boolean booleanArray[];
long longArray[];
float floatArray[];
double doubleArray[];
char charArray[];

// an array of references to objects of
// the class MyClass (a class created by the user)

MyClass myClassArray[]; 

Object[]  ao,        // array of Object
Collection[] ca;  // array of Collection of unknown type