StringIndexOutOfBoundException

Question

Hi I was just using stringbuilder to obtain certain part of the string using substring(int start, int end).. but I\'m having this error

08-17 20:27:40.737: E         


        

Answer 1

Are you using the substring() method but you no has length lower than 4 ,so if you want to get only four number use the following code.

Ex:

   class  SubString
      {
public static void main(String[] args) 
{
StringBuilder str = new StringBuilder(phoneNumber);
    if(str.length()>4){
    System.out.println(str.substring(0,4));
    }
     }
    }