StringSorter.java

import java.util.Collections ;
import java.util.ArrayList ;
import java.util.Arrays ;
/**
Sorting a list of strings alphabetically, using the Collections sort method.

The Comparable interface is a commonly used interface in Java. Look
up the Comparable interface in the API documentation.  It requires
a compareTo method, such that

a.compareTo(b)

returns

1 if a is larger than b
-1 if a is smaller than b
0 if a and b are the same

Since compareTo determines which of two objects is larger, this
interface is used to decouple sorting methods from the classes that
are sorted.  The String class implements Comparable, so we
can sort strings alphabetically using a sort method that sorts
Comparable objects.
The Collections.sort method is one such method.

Here we make a list of strings and print the list and then print it
after sorting.

*/
public class StringSorter
{
public static void main(String[] args)
{
String[] array = {"blue", "red", "yellow",  "cyan",  "orange",  "purple",  "mauve",  "brown"} ;
ArrayList list = new ArrayList() ;

for (int i = 0; i < array.length; i++)
list.add(array[i]);

System.out.println("--------------original array/list:") ;
System.out.println(Arrays.toString(array));


//-----------Start below here. To do: approximate lines of code = 1
//-----------Start below here. To do: approximate lines of code = 1
// 1. sort the array called array using Arrays.sort

//-----------------End here. Please do not remove this comment. Reminder: no changes outside the todo regions.
System.out.println("-------------sorted  array:") ; //
System.out.println(Arrays.toString(array));

System.out.println("Expected:[blue, brown, cyan, mauve, orange, purple, red, yellow]");

//-----------Start below here. To do: approximate lines of code = 1
//-----------Start below here. To do: approximate lines of code = 1
// 2. Sort the arrayList called list using Collections.sort()

//-----------------End here. Please do not remove this comment. Reminder: no changes outside the todo regions.
System.out.println("-------------sorted  list:") ; //
System.out.println(list);

System.out.println("Expected:[blue, brown, cyan, mauve, orange, purple, red, yellow]");
}
}

P.s: please besides the code, also include a screenshot of code, and the output to confirm code doesn't get edited out and the output satisfies the problem!!

Transcribed Image Text:

Purpose: practice using an interface (Comparable) and to see how simple it is to use the sort () method of the Collections class on any list of objects where the object implements Comparable. Sorting strings alphabetically (ascending). Difficulty: Easy See the following files: * StringSorter.java (has todo) Approximate total lines of code required: 2 Purpose: practice using an interface (Comparable) and to see how simple it is to use the sort () method of the Collections class on any list of objects where the object implements Comparable. Sorting strings alphabetically (ascending). Difficulty: Easy See the following files: * StringSorter.java (has todo) Approximate total lines of code required: 2

Answer rating: 100% (QA)

StringSorterjava import javautilCollections import javautilArrayList import javautilArrays Sorting a ... View the full answer