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Java - default array values
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In this article, we would like to show you what are default array values initialized by the compiler when you don’t assign values to array elements in Java.
Quick solution:
| Datatype | Default value |
|---|---|
| int | 0 |
| float | 0.0 |
| double | 0.0 |
| boolean | false |
| String | null |
| byte | 0 |
In this example, we create one-element, not initialized arrays to see what is the default value for each type.
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import java.util.Arrays;2
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public class Example {4
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private static int[] intArray = new int[1];6
private static float[] floatArray = new float[1];7
private static double[] doubleArray = new double[1];8
private static boolean[] booleanArray = new boolean[1];9
private static String[] stringArray = new String[1];10
private static byte[] byteArray = new byte[1];11
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public static void main(String[] args) {13
System.out.println("int: " + Arrays.toString(intArray));14
System.out.println("float: " + Arrays.toString(floatArray));15
System.out.println("double: " + Arrays.toString(doubleArray));16
System.out.println("boolean: " + Arrays.toString(booleanArray));17
System.out.println("String: " + Arrays.toString(stringArray));18
System.out.println("byte: " + Arrays.toString(byteArray));19
}20
}21
Output:
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int: [0]2
float: [0.0]3
double: [0.0]4
boolean: [false]5
String: [null]6
byte: [0]