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  1. Prepare
  2. Regex
  3. Applications
  4. Detect the Email Addresses
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Detect the Email Addresses

  • kernel24
     + 1 comment

    Change your code like the below.

    class Calculate {
public static Scanner sc =new Scanner(System.in);
~~~~
public void checkString(String s){

        if (s.startsWith("-")|| Double.valueOf(s)<=0)
            throw new NumberFormatException("All the values must be positive");

}

~~~~~
    public class Output {
    public void display(double volume) {
        ~~~~~
        if(Double.valueOf(s)>0)
            System.out.println(s);
    }
}