/* Let's practice with Strings and built-in String functions.
 */
public class StringFun
{
  public static void main(String [] args)
  {
    String s1 = "dog";
    String s2 = "house";
    System.out.println(s2);             // Output:  ________________________

    // Let's investigate charAt().
    char c = s2.charAt(2);
    System.out.println(c);              // Output:  ________________________

    // Comparing 2 strings.
    String s3 = "Dog";
    boolean areEqual = s1.equals(s3);
    System.out.println(areEqual);       // Output:  ________________________

    areEqual = s1.equalsIgnoreCase(s3);
    System.out.println(areEqual);       // Output:  ________________________

    boolean isLessThan = s1.compareTo(s2) < 0;
    System.out.println(isLessThan);     // Output:  ________________________

    // startsWith() and endsWith() are analogous.
    String s4 = "Happy";
    boolean begin = s4.startsWith("ha");
    System.out.println(begin);          // Output:  ________________________

    boolean isAdverb = s4.endsWith("ly");
    System.out.println(isAdverb);       // Output:  ________________________

    System.out.println(s4.length());    // Output:  ________________________

    int locationT = s4.indexOf('t');
    System.out.println(locationT);      // Output:  ________________________

    // Some searching functions:  indexOf(), lastIndexOf() and substring()
    String s5 = "Down came a jumbuck to drink beside" +
                " the billabong";
    System.out.println(s5.length());    // Output:  ________________________

    System.out.println(s5.substring(5,9));  // Output:  ____________________

    int firstE = s5.indexOf('e');
    int lastE = s5.lastIndexOf('e');
    System.out.println(firstE);         // Output:  ________________________

    System.out.println(lastE);          // Output:  ________________________

    // Note:  replace() doesn't actually change the string.
    String s6 = s2.replace('h', 'm');
    System.out.println(s2 + s6);        // Output:  ________________________

    // Let's put strings together using the + operator.
    s1 = "dog";
    s2 = "house";
    s3 = s1 + 8 + s2;
    System.out.println(s3);             // Output:  ________________________

    s5 = s5.replace('a','A').replace('e','E');
    System.out.println(s5);             // Describe what s5 looks like now.
  }
}