Question

Java programming question:

Here is the feedback I received "sort fails. Use Arrays class method to sort."

The actual question:

Write a program as follows:

• Declare a five element array of Strings.
• Use a for loop and keyboard input to populate the array with the names of five friends.
• Sort the array in alphabetical order.
• Use a foreach loop to print the sorted array of friends, all on one line.

Sample Output (inputs in italics)

Enter the names of five good friends

Kenny Denny Penny Jenny Benny

My friends in alphabetical order: Benny Denny Jenny Kenny Penny

______________________________________________________________________

My code:

import java.util.Scanner;

public class Program2 {

   public static void main(String[] args) {
       Scanner input = new Scanner(System.in);
       // declare array of 5 strings
       String[] name = new String[5];
       System.out.println("Enter the names of five good friends:");
       // use loop to enter names into array
       for (int i = 0; i < 5; i++) {
           name[i] = input.next();
       }
       // sort array in alphabetical order using selection sort
       for (int i = 0; i < 4; i++) {
           for (int j = i + 1; j < 5; j++) {
               String temp = name[i];
               name[i] = name[j];
               name[j] = temp;
           }
       }
       // print the sorted array using foreach loop
       System.out.print("My friends in alphabetical order: ");
       for (String temp : name) {
           System.out.print(temp + " ");
       }
   }
}

Answer 1

import java.util.Scanner;
import java.util.Arrays;

public class prog2
{

public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
// declare array of 5 strings
String[] name = new String[5];
System.out.println("Enter the names of five good friends:");
// use loop to enter names into array
for (int i = 0; i < 5; i++) {
name[i] = input.next();
}

//call sort method of array class to sort the names
Arrays.sort(name);

// print the sorted array using foreach loop
System.out.print("My friends in alphabetical order: ");
for(int i=0;i<5;i++)
System.out.print(" "+name[i]);
}
}

OUTPUT