Arrays - A Concise and Practical Introduction to Programming Algorithms in Java - page 89

3
4

The I in [I@3e25a5 indicates that this is a reference to an array of integers.
The forefront letter varies according to the type of array elements as illustrated
by the following code:

Program 4.5 Printing the references of various typed arrays
class ArrayDisplay {
public static void main ( String [ ] args )
int [] x= new i n t [10]; System.out. println(x);
double [] y= new double [20]; System.out. println(y);
float [] z= new f l o a t [5]; System.out.println(z);
boolean [] b= new boolean [7];System.out.println(b);
}

}

We get 3 :
[I@3e25a5
[D@19821f
[F@addbf1
[Z@42e816

v

type
length

[I
6
2
3
1
2
7
1

0
1
2
3
4
5

Figure 4.1 A way to visualize arrays in
Java, explained for the array declaration and
assignment: int [] v =

{ 2,3,1,2,7,1 } ; .

One way to depict arrays is shown in Figure 4.1. Note that the length and type
of the array are indicated in this representation (reflexive arrays).

3 Anarrayofstringshastype [Ljava.lang.String;