Java™ How To Program (Early Objects), Tenth Edition

14.3.4 Locating Characters and Substrings in Strings

Often it’s useful to search a string for a character or set of characters. For example, if you’re creating your own word processor, you might want to provide a capability for searching through documents. Figure 14.5 demonstrates the many versions of String methods indexOf and lastIndexOf that search for a specified character or substring in a String.

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 1   // Fig. 14.5: StringIndexMethods.java 2   // String searching methods indexOf and lastIndexOf. 3  4   public class StringIndexMethods 5   { 6      public static void main(String[] args) 7      { 8         String letters = "abcdefghijklmabcdefghijklm"; 9 10         // test indexOf to locate a character in a string ...