Help in Java

I was wondering, is there away to read an integer and then take that integer and pull it apart. Like take one int at a time from that longer integer.

I did it by reading it as a String and took one char at a time, but was wondering if it could be done the above way.
public static void main(String[] args) {
Scanner keyboard = new Scanner(System.in);

System.out.print("Enter a positive integer greater than 10: ");
String user = keyboard.next();

int userLength = user.length();
//System.out.println(user);
//System.out.println(userLength);
char i=' ';
int total=0,r,numInPosition=1,numSum,userInteger=0;
for (r=0; r<=userLength-1; r++)
{
i=user.charAt(r);

switch (i)
{
case '1':
total=total+1;
numInPosition=1;
break;
case '2':
total=total+2;
numInPosition=2;
break;
case '3':
total=total+3;
numInPosition=3;
break;
case '4':
total=total+4;
numInPosition=4;
break;
case '5':
total=total+5;
numInPosition=5;
break;
case '6':
total=total+6;
numInPosition=6;
break;
case '7':
total=total+7;
numInPosition=7;
break;
case '8':
total=total+8;
numInPosition=8;
break;
case '9':
total=total+9;
numInPosition=9;
break;
}
int position = userLength-1-r, b=1;
for (int t=1; t<=position; t++)b=b*10;
numSum=numInPosition*b;
userInteger=userInteger+numSum;
b=1;
System.out.println(numSum+" "+userInteger);
}