Write code to check if a string is a Valid Dec String
//package com.book2s; public class Main { public static void main(String[] argv) { String str = "book2s.com"; System.out.println(isValidDecString(str)); }//from w w w .ja va2s . c o m /** * * @param str * @return */ public static boolean isValidDecString(String str) { char ch; for (int i = 0; i < str.length(); i++) { ch = str.charAt(i); if (ch < '0' || ch > '9') return false; } return true; } }