User input a number such as `1234569775` of 10 digit. may on of the digit has a Value of X and this mean its equal to number 10 SO i write my code 

```
    Scanner in=new Scanner(System.in);
    String a=in.next();
    String arr[]=new String[10];
    for (int i=0;i<arr.length;i++)
    {
        arr[i]=String.valueOf(a.charAt(i));
    }
    for (int i=0;i<arr.length;i++)
    {
        if (arr[i]=="X")
        {
            arr[i]="10";
        }
    }
    System.out.println(Arrays.deepToString(arr));
}

```

but its the value of X does not change and I try to make a new array and does not make any change too  

last thing i want to change this String array all value in it to Integer so I can make any Mathematical operation on them
So I want

1. Change value of X to 10
2. Change the array values to Integer

How can I do that in Java?