Array Element Initialization Values : Array Elements « Java Source And Data Type « SCJP

Element Type       Initial Value

byte               0

int                0

float              0.0f

char               '\u0000'

object reference   null

short              0

long               0L

double             0.0d

boolean            false

1.17.Array Elements
1.17.1.Array Element Initialization Values
1.17.2.Combine declaration, construction, and initialization into a single step
1.17.3.The array size is inferred from the number of elements within the curly braces.
1.17.4.An array can be initialized by assigning a value to each element
1.17.5.Create a 20 by 30 array of String objects