COS126

• Download Reverse.java

/*************************************************************************
 * Name:
 * Login:
 * Precept:
 *
 * Description: Shows off two ways to reverse an array and what happens
 * after each.
 *
 * Dependencies: StdOut.java
 *
 * Example:
 * % java Reverse Alice Bob Carol Dave  
 * args[]
 * ---------------------------------------
 * Alice
 * Bob
 * Carol
 * Dave
 *
 * Array returned by reverse1(args)
 * ---------------------------------------
 * Dave
 * Carol
 * Bob
 * Alice
 *
 * args[] did not change
 * ---------------------------------------
 * Alice
 * Bob
 * Carol
 * Dave
 *
 * args[] after calling reverse2(args)
 * ---------------------------------------
 * Dave
 * Carol
 * Bob
 * Alice                           (This is booksite Web Exercise 2.1.35.)
 *************************************************************************/

public class Reverse {

    // TO DO: Write a method reverse1() that takes a String array as an argument,
    // and returns a new String array which holds the reverse of the argument array.
    // DO NOT ALTER the original array.

    // return a reversed copy of the original String array 
    public static _________ reverse1(__________________________________) {







    }

    // TO DO: Use the code from page 89 or Booksite Ex.1.4.4 to write a function
    // reverse2() to reverse the elements in a String array. The array is an
    // argument of the method. The method does not return anything. It reverses
    // the original array.
    
    // reverse the argument array
    public static ________ reverse2(_______________________________) {







    }


    // print the entries in the array a[] to standard output
    public static void show(String[] a) {
        for (int i = 0; i < a.length; i++) {
            StdOut.println(a[i]);
        }
    }

    public static void main(String[] args) { 

        // original array
        StdOut.println("args[]");
        StdOut.println("---------------------------------------");
        show(args);
        StdOut.println();

        // create a new array that is the reverse of args[]
        StdOut.println("Array returned by reverse1(args)");
        StdOut.println("---------------------------------------");
        String[] reverse = reverse1(args);
        show(reverse);
        StdOut.println();

        // args[] did not change
        StdOut.println("args[] did not change");
        StdOut.println("---------------------------------------");
        show(args);
        StdOut.println();

        // args[] after calling reverse2(args)
        StdOut.println("args[] after calling reverse2(args)");
        StdOut.println("---------------------------------------");
        reverse2(args);
        show(args);
        StdOut.println();
    }
}