CODEWITHSUNDEEP
javaregextokenize
AndreaF
AndreaF

Reputation: 12375

How to tokenize from a String of numbers to an int array

I have a String of this kind

String s=1956;

and want to convert this String in int[] array

[1,9,5,6];

Any suggestion?

Upvotes: 0

Views: 1856

Answers (4)

Mofe Ejegi
Mofe Ejegi

Reputation: 1073

I'm going to provide a the most possible simple solution to this; 

String s = "1956";
        int array[] = new int[4];

        array[0] = Integer.parseInt(s.charAt(0)+"");
        array[1] = Integer.parseInt(s.charAt(1)+"");
        array[2] = Integer.parseInt(s.charAt(2)+"");
        array[3] = Integer.parseInt(s.charAt(3)+"");

Obviously loops can do this, but you really didn't tell us the context of your situation

Upvotes: 0

khelwood
khelwood

Reputation: 59096

I would do it like this:

int[] digits = new int[s.length()];
for (int i = 0; i < digits.length; ++i) {
    digits[i] = s.charAt(i)-'0';
}

I could never bring myself to use Integer.parseInt(String) just to translate a digit character into an integer.

Upvotes: 1

DWilches
DWilches

Reputation: 23016

You can use the split method of String to convert it to a String[], and then you can iterate over it calling Integer.parseInt to populate a int[]

Upvotes: 1

Chris Thompson
Chris Thompson

Reputation: 35598

One option would be 

char[] nums = s.toCharArray();
int[] parsed = new int[nums.length];
for (int i = 0; i < nums.length; ++i){
    parsed[i] = Integer.parseInt(String.valueOf(nums[i]));
}

Upvotes: 0

Related Questions