Java Convert int Array To String Example

/*

        Java Convert int Array To String Example

        This Java Convert int Array To String example shows how to find convert an array of int

        to a String in Java.

 */

import java.util.Arrays;

public class ConvertIntArrayToStringExample {

        public static void main(String args[]){

               

                //int array

                int[] intNumbers = new int[]{1, 2, 3, 4, 5};

               

                /*

                 * First approach is to loop through all elements of an int array

                 * and append them to StringBuffer object one by one. At the end,

                 * use toString method to convert it to String.

                 */

               

                //create new StringBuffer object

                StringBuffer sbfNumbers = new StringBuffer();

               

                //define the separator you want in the string. This example uses space.

                String strSeparator = " ";

               

                if(intNumbers.length > 0){

                       

                        //we do not want leading space for first element

                        sbfNumbers.append(intNumbers[0]);

                       

                        /*

                         * Loop through the elements of an int array. Please

                         * note that loop starts from 1 not from 0 because we

                         * already appended the first element without leading space.s  

                         */

                        for(int i=1; i < intNumbers.length; i++){

                                sbfNumbers.append(strSeparator).append(intNumbers[i]);

                        }

                       

                }

               

                System.out.println("int array converted to String using for loop");

               

                //finally convert StringBuffer to String using toString method

                System.out.println(sbfNumbers.toString());

               

                /*

                 * Second options is to use Arrays class as given below.

                 * Use Arrays.toString method to convert int array to String.

                 *

                 * However, it will return String like [1, 2, 3, 4, 5]

                 */

               

                String strNumbers = Arrays.toString(intNumbers);

               

                System.out.println("String generated from Arrays.toString method: " + strNumbers);

               

                //you can use replaceAll method to replace brackets and commas

                strNumbers = strNumbers.replaceAll(", ", strSeparator).replace("[", "").replace("]", "");

               

                System.out.println("Final String: " + strNumbers);

        }

}

/*

Output of above given convert int array to String example would be

int array converted to String using for loop

1 2 3 4 5

String generated from Arrays.toString method: [1, 2, 3, 4, 5]

Final String: 1 2 3 4 5

*/