public class AssignMixed
{
    public static void main(String[] args)
    {
        byte   a = 1;
        int    b = 2;
        float  c = 3;
        double d = 4;

        d = a + c;   // Allowed (a + c is a float)
        a = a + 1;   // Disallowed (a + 1 is an int)
    }
}