What is a NumberFormatException and how can I fix it?

Question

Error Message:
Exception in thread \"main\" java.lang.NumberFormatException: For input string: \"Ace of Clubs\"
    at java.lang.NumberFormatException.forInputString         


        

Answer 1

The Exception comes in your code, where you convert the String to an Integer :

int first_value = Integer.parseInt(cards[index]);

where you pass a String as "Ace of Clubs" which is not possible to convert as integer,so it throws Number Format Exception. You can use,

try {
     ....
     // Your Code
     ....
    }
catch(NumberFormatException e)
{
    e.getMessage();  //You can use anyone like printStackTrace() ,getMessage() to handle the Exception
}