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How to determine length or size of an Array in Java?

  • Difficulty Level : Basic
  • Last Updated : 30 Sep, 2019

There is no size() method available with the array. But there is a length field available in the array that can be used to find the length or size of the array.

array.length: length is a final variable applicable for arrays. With the help of the length variable, we can obtain the size of the array.

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Examples:

int size = arr[].length;

// length can be used 
// for int[], double[], String[] 
// to know the length of the arrays.

Below is the illustration of how to get the length of array[] in Java using length variable:



Example 1:




// Java program to illustrate
// how to get the length of the array
  
public class Test {
    public static void main(String[] args)
    {
  
        // Here array is the
        // array name of int type
        int[] array = new int[4];
  
        System.out.println("The size of "
                           + "the array is "
                           + array.length);
    }
}
Output:
The size of the array is 4

Example 2:




// Java program to illustrate
// how to get the length of the array
  
public class Test {
    public static void main(String[] args)
    {
  
        // Here str is the array name
        // of String type.
        String[] str
            = { "GEEKS", "FOR", "GEEKS" };
  
        System.out.println("The size of "
                           + "the array is "
                           + str.length);
    }
}
Output:
The size of the array is 3



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