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

14.3.5 Extracting Substrings from Strings

Class String provides two substring methods to enable a new String object to be created by copying part of an existing String object. Each method returns a new String object. Both methods are demonstrated in Fig. 14.6.

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 1   // Fig. 14.6: SubString.java 2   // String class substring methods. 3  4   public class SubString 5   { 6      public static void main(String[] args) 7      { 8         String letters = "abcdefghijklmabcdefghijklm"; 9 10         // test substring methods11         System.out.printf("Substring from index 20 to end is \"%s\"%n",12            letters.substring(20));13         System.out.printf("%s \"%s\"%n",14            "Substring from index 3 up to, but ...