Removing first digit from int, but keeping leading zeros

super95 :

I need to write code for removing the first digit if an int is more than 3 digits. For example if I have 1055 then the output would be 055. My current code removes the first digit but the problem is it also removes the zeros and outputs 55 instead of 055. How would I got about to fix this? The variable that I'm referring to is the checksum

 int checksum = 0;
 int l = message.length();

 for (int i = 0; i < l; i++) { 3
   checksum += message.charAt(i);
 }
 if (checksum >= 1000) {
   checksum = Integer.parseInt(Integer.toString(checksum).substring(1));
 }
 physicalLayer.sendFrame("(" + message + ":" + checksum + ":.)");

Teddy :

You obviously cannot keep leading zeros in int data type. So, keep the result in a String copy

int checksum=0;
int l= message.length();

for (int i = 0; i < l; i++) { 
checksum+= message.charAt(i);

}

String sChecksum = Integer.toString(checksum);
if(checksum>=1000){
sChecksum= sChecksum.substring(1);   

}


physicalLayer.sendFrame("("+message+":"+sChecksum+":.)");