Answers for "how to change string array to number array java"

how to change a string array in integer array

import java.util.Arrays;
public class StringToIntegerArray {
   public static void main(String args[]) {
      String [] str = {"123", "345", "437", "894"};
      int size = str.length;
      int [] arr = new int [size];
      for(int i=0; i<size; i++) {
         arr[i] = Integer.parseInt(str[i]);
      }
      System.out.println(Arrays.toString(arr));
   }
}

converter int array para string java

int[] array = { 1, 2, 3, 4, 5 };
String s = String.join("", IntStream.of(array).mapToObj(String::valueOf).toArray(String[]::new));
System.out.println(s); // 12345