Whenever you create a new array, Java automatically fills each element with a default value. Once the array is constructed, a new array is allocated in heap memory based on the array's type. In this article, we will look at what the default values of an array are in Java.
The default values assigned to array elements are listed below.
- boolean: false
- int : 0
- double : 0.0
- String: null
- User-Defined Type: null
class ClassOne
{
public static void main(String[] args)
{
// Declaring an int type array
int intArray[] = new int[2];
// Print all elements of intArray
for (int i = 0; i < intArray.length; i++)
System.out.println("Elements of intArray = " + intArray[i]);
// Declaring an boolean type array
boolean[] booleanArray = new boolean[2];
// Print all elements of booleanArray
for (int i = 0; i < booleanArray.length; i++)
System.out.println("Elements of booleanArray = " + booleanArray[i]);
// Declaring an String type array
String[] stringArray = new String[2];
// Print all elements of stringArray
for (int i = 0; i < stringArray.length; i++)
System.out.println("Elements of stringArray = " + stringArray[i]);
}
}
Output: Elements of intArray = 0
Elements of intArray = 0
Elements of booleanArray = false
Elements of booleanArray = false
Elements of stringArray = null
Elements of stringArray = null
