How to concatenate int values in java?

Question

I have the following values:

int a=1;  int b=0; int c=2; int d=2; int e=1; 

How do i concatenate these values so that i end up with a String that is 10221; please note that multiplying a by 10000, b by 1000.....and e by 1 will not working since b=0 and therefore i will lose it when i add the values up.

Answer 1

The easiest (but somewhat dirty) way:

String result = "" + a + b + c + d + e 

Edit: I don't recommend this and agree with Jon's comment. Adding those extra empty strings is probably the best compromise between shortness and clarity.

Answer 2

Michael Borgwardt's solution is the best for 5 digits, but if you have variable number of digits, you can use something like this:

public static String concatenateDigits(int... digits) {    StringBuilder sb = new StringBuilder(digits.length);    for (int digit : digits) {      sb.append(digit);    }    return sb.toString(); }