arithmetic operators byte short datatypes

package funds;

public class DiffOpera {

    public static void main(String ar[])
    {
        /* If we apply arithmetic operation between two operands a and b
        the result is always max(int,type of a,type of b) */
        // using arithmetic operation
        byte b=10;
        b=b+1;   // error because max(int,short,int)
        
        short s=40;
        s=s+1;   // error because max(int,short,int)
        
        // The above error in case of byte and short only we will get
        
        int i=20;
        i=i+1;    // no error  because max(int,type of a,type of b)
                
        
        // using increment decrement
  byte b1=++b;  // no error because It perform like this (type b1)b1+1;
        short s1=++s; // no error
        int i1=++i1;  // no error 
        
    }
}