Write code to check if a string contains a char
//package com.book2s; public class Main { public static void main(String[] argv) { String str = "book2s.com"; char searchChar = 'o'; System.out.println(contains(str, searchChar)); }/*from w w w . j a v a2 s. c om*/ public static boolean contains(String str, char searchChar) { if ((str == null) || (str.length() == 0)) { return false; } return str.indexOf(searchChar) >= 0; } public static boolean contains(String str, String searchStr) { if ((str == null) || (searchStr == null)) { return false; } return str.indexOf(searchStr) >= 0; } }