Determine wether input is an int or a string

Question

I have been using Scanner and System.in recently, but I am not able to find a code that can judge whether the input is a String or an integer and then treat it accordingly. Does anonye know a way?

possible duplicate of [How to check if a String is a numeric type in Java](http://stackoverflow.com/questions/1102891/how-to-check-if-a-string-is-a-numeric-type-in-java) — Nick Louloudakis, Dec 18 '14 at 14:26

score 2 · Answer 1 · answered Dec 18 '14 at 14:25

Use Scanner.next() to get the input String then test with Integer.parseInt(String) if it's integer or not. try this code:

Scanner scanner = new Scanner(System.in);
if(scanner.hasNext())
{
        String s = scanner.next();
        try
        {
            int number = Integer.parseInt(s);
            System.out.println("Your input is an integer.");
        }
        catch(NumberFormatException e)
        {
            System.out.println("Your input is a String.");
        }
}

score 0 · Answer 2 · answered Dec 18 '14 at 14:19

0

try{ 
  Integer.parseInt(input);
}catch(NumberFormatException e){
    System.out.printerr("Not an integer: " + input);
}

answered Dec 18 '14 at 14:19

agad

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Determine wether input is an int or a string

2 Answers2