You need to convert the item that you popped off the stack into a double:
double endNumber = Double.parseDouble(numbers.pop());
return endNumber;
Question
Okay, so here's the line of code I'm having trouble with:
double endNumber = (double)numbers.pop();
return endNumber;
My problem is that I need the number that pops off the stack as a double, but I keep getting the error:
Exception in thread "main" java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Double
Is there anyway to get around this?
La solution 3
You need to convert the item that you popped off the stack into a double:
double endNumber = Double.parseDouble(numbers.pop());
return endNumber;
Autres conseils
Your pop()
method returns String
, and, you have to parse it to double
double endNumber = Double.parseDouble(numbers.pop());
return Double.parseDouble(numbers.pop());
You ll have to use Double.parseDouble(argument)
double endNumber = Double.parseDouble(numbers.pop());
or you can directly return without using any double
variable.