Java: double vs float

Question

In another Bruce Eckel exercise, the code I\'ve written takes a method and changes value in another class. Here is my code:

class Big {
  float b;
}

public         


        

Answer 1

No, floats can be automatically upcast to doubles, but doubles can never be floats without explicit casting because doubles have the larger range.

float range is 1.40129846432481707e-45 to 3.40282346638528860e+38

double range is 4.94065645841246544e-324d to 1.79769313486231570e+308d