Convert decimal to hexadecimal

  public class DtoH {
      public static void main(String[] args) {
          toHex(60);
      }
      public static void toHex(int num) {
          for(int x=0; x<8; x++) {
              int temp = num & 15;
              if(temp>9)
                  System.out.println((char)(temp-10+'A')); //？？？？
              else
                  System.out.println(temp);
              num = num >>> 4;
          }
      }
  }
  

The above is a small hexadecimal decimal conversion program to convert decimal number 60 this hex .
which

temp-10+'A'

This code is what does that mean ?
I know the output is hexadecimal 'C', but would like to ask what this code relates to knowledge ?
Is 10 hex is 'A', 2 + 'A' is equal to 'C' of ?
------ Solution ---------------------------------------- ----
the 10,11,12,13,14,15 respective output into a, B, C, D, E, F
------ Solution ------- -------------------------------------
char t = 2 + 'A';

t = 'C';

2 + 'A' = 67
------ Solution ---------------------- ----------------------
different data types involved in computing , the data type to be cast , the direction of conversion

(unsigned) char, (unsigned) short-> int-> unsigned-> long-> unsigned long-> float-> double

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About 2 + 'A' = 'C';
I still have a question , is not the same type of how it can be simple addition
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Oh, so detailed ah , thank you