How Many ways we can print Array in Java

 

Hi Friends,

Today i am going to show how many ways we can print Array in Java.

As we know following points:- 

Java array is a data structure where we can store the elements of the same data type.

The elements of an array are stored in a contiguous memory location. 

So, we can store a fixed set of elements in an array.

The index of an array starts from 0. 

there are following ways to print array:

Java for loop

Java for-each loop

Java Arrays.toString() method

Java Arrays.deepToString() method

Java Arrays.asList() method

Java Iterator Interface

Java Stream API

package comm.neesri.collection;   import java.util.Arrays; import java.util.Iterator; import java.util.List;   public class PrintArray {           public static void main(String[] args) {                       // 1. ====> Java for loop                     /*                      * we have not provided the size of the array. In this case, the Java compiler                      * automatically specifies the size by counting the number of elements in the                      * array (i.e. 7).                      */                     int[] numbers = { 4, 1, 6, 2, 6, 9, 8 };                       for (int i = 0; i < numbers.length; i++) {                               System.out.println("printing array through for loop " + numbers[i]);                       }                       // 2 ==> Java for-each loop                       for (int numbers1 : numbers) {                               System.out.println("printing array through for-each loop " + numbers1);                       }                     // 3. ==> Arrays.toString() method                       System.out.println("printing array through Arrays.toString() method " + Arrays.toString(numbers));                       // 4. ==> Arrays.asList() method                     /*                      * We have changed the type to Integer from int, because List is a collection                      * that holds a list of objects. When we are converting an array to a list it                      * should be an array of reference type.                      *                      * Java calls Arrays.asList(intArray).toString() . This technique internally                      * uses the toString() method of the type of the elements within the list.                      */                     Integer[] numbers1 = { 4, 1, 6, 2, 6, 9, 8 };                     System.out.println("printing array through Arrays.asList() method" + Arrays.asList(numbers1));                       // 5. ==>iterator() method.                     Integer[] numbers2 = { 4, 1, 6, 2, 6, 9, 8 };                     // creating a List of Integer                       List<Integer> list = Arrays.asList(numbers2);                     Iterator<Integer> itr = list.iterator();                     while (itr.hasNext()) {                                 System.out.println("printing array " + " iterator " + itr.next());                     }                     // 6. ==> stream() method                     /*                      * The Stream API is used to process collections of objects. A stream is a                      * sequence of objects. Streams don’t change the original data structure, they                      * only provide the result as per the requested operations.                      *                      */                     int[] numbers3 = { 4, 1, 6, 2, 6, 9, 8 };                     Arrays.stream(numbers3).forEach(System.out::println);             }   }