Question

JAVA CODE

Give the definition of a static method called showArray that has an array of base type char as a single parameter and that writes to the screen each character in the array on a separate line. It then writes the same array characters in reverse order. This method returns a character array that holds these two lines of characters in the order that you printed them.

Answer 1

CODE:

public class Array {
   public static char[] showArray(char[] array) {

       // creating a char array twice the capacity to store the contents of

       // array in forward and reverse

       char[] combined = new char[array.length * 2];

       int index = 0;

       // looping from first character to the last

       for (int i = 0; i < array.length; i++) {

           // printing current character on a separate line

           System.out.println(array[i]);

           // adding current character to combined array at index 'index'

           combined[index] = array[i];

           // updating index

           index++;

       }

       // looping from last character to the first

       for (int i = array.length - 1; i >= 0; i--) {

           // printing current character on a separate line

           System.out.println(array[i]);

           // adding current character to combined array at index 'index'

           combined[index] = array[i];

           // updating index

           index++;

       }

       // returning combined array

       return combined;

   }
   public static void main(String[] args) {
       char initialArray[] = {'a','c','d','e'};

        // Now arr will contain required format of array;
       char arr[] = showArray(initialArray);
   }
}