Java convert string array to int array

Question

Problem:

I am facing a problem to convert my string type array to an integer type array. Let’s say I have an array of string

String [] mystr = {"123", "234", "345", "456"};

and I want to cast my string to an integer type

String [] mystr = {123, 234, 345, 456};

I don’t know what do you say, or what is the proper term! I gave an example to describe it properly. So, let me put my question this way how Java converts string array to int array? Please, shed some light on this.
Thanks in advance.

Answer 1

You can easily convert or cast your string array data into an integer array data. There is a method called parseInt() available in java to convert your string array to integer array. This method converts each string element to an integer element to the length of an array. You just need to populate it with the integer array in your program. 

import java.util.Arrays;
public class MyClass {
   public static void main(String args[]) {
      String [] mystr = {"123", "234", "345", "456"};
      int size = mystr.length;
      int [] myarr = new int [size];
      for(int i=0; i<size; i++) {
         myarr[i] = Integer.parseInt(mystr[i]);
      }
      System.out.println(Arrays.toString(myarr));
   }
}

This program should print an output

[123, 234, 345, 456]