Java tutorial Array length
Java tutorial Array length
arrayName.length
For example, given the previous example, we can re-write it as,
public class ArraySample
{
public static void main( String[] args ){
int[] ages = new int[100];
for( int i=0; ifinal int ARRAY_SIZE = 1000; //declare a constant
. . .
int[] ages = new int[ARRAY_SIZE];
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In order to get the number of elements in an array, you can use the length field of an array. The length field of an array returns the size of the array. It can be used by writing,
arrayName.length
For example, given the previous example, we can re-write it as,
public class ArraySample
{
public static void main( String[] args ){
int[] ages = new int[100];
for( int i=0; i
- When creating for loops to process the elements of an array, use the array object's length field in the condition statement of the for loop. This will allow the loop to adjust automatically for different-sized arrays.
- Declare the sizes of arrays in a Java program using named constants to make them easy to change. For example,
. . .
int[] ages = new int[ARRAY_SIZE];
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