How can I prevent java.lang.NumberFormatException: For input string: "N/A"? [closed]

Question

While running my code I am getting a NumberFormatException:

java.lang.NumberFormatException: For input string: "N/A"     at java.lang.NumberFormatException.forInputString(Unknown Source)     at java.lang.Integer.parseInt(Unknown Source)     at java.lang.Integer.valueOf(Unknown Source)     at java.util.TreeMap.compare(Unknown Source)     at java.util.TreeMap.put(Unknown Source)     at java.util.TreeSet.add(Unknown Source)` 

How can I prevent this exception from occurring?

Answer 1

"N/A" is not an integer. It must throw NumberFormatException if you try to parse it to an integer.

Check before parsing or handle Exception properly.

1. Exception Handling

   try{     int i = Integer.parseInt(input); } catch(NumberFormatException ex){ // handle your exception     ... } 

or - Integer pattern matching -

String input=...; String pattern ="-?\\d+"; if(input.matches("-?\\d+")){ // any positive or negetive integer or not!  ... }