String class substring methods : String « Data Type « Java Tutorial

1. Java Tutorial
2. Data Type
3. String

public class MainClass
{
   public static void main( String args[] )
   {
      String letters = "abcdefghijklmabcdefghijklm";

      // test substring methods
      System.out.printf( "Substring from index 20 to end is \"%s\"\n",
         letters.substring( 20 ) );
      System.out.printf( "%s \"%s\"\n", 
         "Substring from index 3 up to, but not including 6 is",
         letters.substring( 3, 6 ) );
   } // end main
}

Substring from index 20 to end is "hijklm"
Substring from index 3 up to, but not including 6 is "def"