Question

Simple one this morning, but causing me issues and can’t seem to find any code out there. I have created a hex representation of a number, and wish to now save the last 4 characters of the hex string to then convert back to an integer.

The code that converts is shown below:

int in2 = new Integer(mycard.resourceid.toString());
String hex = Integer.toHexString(in2);

If someone could nudge me in the right direction I would be most appreciative.

int in3 = new Integer(hex.length());
int in4 = new Integer (in3 - 4);
String mystring = hex.subString(in4, in3);

Answer 1

If you just want a nudge, look for the substring method of the String class.

EDIT: Some sample code in response to OP followup:

public class Test {
    public static void main(String[] args) throws Exception {
        Integer in2 = 897387483;
        String hex = Integer.toHexString(in2);
        System.out.println(hex);
        System.out.println(hex.substring(hex.length()-4, hex.length()));
    }
}