public class Sorting

{//-----------------------------------------------------------------// Sorts the specified array of objects using the selection// sort algorithm.//-----------------------------------------------------------------

public static void selectionSort (Comparable[] list)

{

int min;

Comparable temp; for (int index = 0; index

{

min = index;

for (int scan = index+1; scan

if (list[scan].compareTo(list[min])

min = scan;

// Swap the values temp= list[min]; list[min] =list[index]; list[index]= temp;

} }

//-----------------------------------------------------------------// Sorts the specified array of objects using the insertion// sort algorithm.//-----------------------------------------------------------------

public static void insertionSort (Comparable[] list)

{

for (int index = 1; index

{

Comparable key = list[index];

int position = index; // Shift larger values to the right

while (position > 0 && key.compareTo(list[position-1])

{

list[position] = list[position-1];

position--;

} list[position] = key;

} }

}

//**********************************************************// Numbers.java//// Demonstrates selectionSort on an array of integers.//********************************************************** import java.util.Scanner; public class Numbers

{//---------------------------------------------// Reads in an array of integers, sorts them,// then prints them in sorted order.//---------------------------------------------

public static void main (String[] args)

{

int[] intList;int size; Scanner scan = new Scanner(System.in); System.out.print (" How many integers do you want to sort? ");

size = scan.nextInt();

intList = new int[size]; System.out.println (" Enter the numbers...");

for (int i = 0; i

intList[i] = scan.nextInt(); Sorting.selectionSort(intList) ;

System.out.println (" Your numbers in sorted order...");

for (int i = 0; i

System.out.print(intList[i] + " ");

System.out.println ();

} }

// *******************************************************// Salesperson.java//// Represents a sales person who has a first name, last// name, and total number of sales.// ******************************************************* public class Salesperson implements Comparable

{

private String firstName, lastName;

private int totalSales; //------------------------------------------------------// Constructor: Sets up the sales person object with// the given data.//------------------------------------------------------

public Salesperson (String first, String last, int sales)

{

firstName = first;

lastName = last;

totalSales = sales;

} //-------------------------------------------// Returns the sales person as a string.//-------------------------------------------

public String toString()

{

return lastName + ", " + firstName + ": \t" + totalSales;

} //-------------------------------------------// Returns true if the sales people have// the same name.//-------------------------------------------

public boolean equals (Object other)

{

return (lastName.equals(((Salesperson)other).getLastName()) &&

firstName.equals(((Salesperson)other).getFirstName()));

} //--------------------------------------------------// Order is based on total sales with the name// (last, then first) breaking a tie.//--------------------------------------------------

public int compareTo(Object other)

{

int result; return result;

}

//------------------------- // First name accessor.//-------------------------

public String getFirstName()

{

return firstName;

} //-------------------------// Last name accessor.//-------------------------

public String getLastName()

{

return lastName;

} //-------------------------// Total sales accessor.//-------------------------

public int getSales()

{

return totalSales;

} }

// ******************************************************************// WeeklySales.java//// Sorts the sales staff in descending order by sales.// ****************************************************************** public class WeeklySales

{

public static void main(String[] args)

{

Salesperson[] salesStaff = new Salesperson[10]; salesStaff[0] = new Salesperson("Jane", "Jones", 3000);

salesStaff[1] = new Salesperson("Daffy", "Duck", 4935);

salesStaff[2] = new Salesperson("James", "Jones", 3000);

salesStaff[3] = new Salesperson("Dick", "Walter", 2800);

salesStaff[4] = new Salesperson("Don", "Trump", 1570);

salesStaff[5] = new Salesperson("Jane", "Black", 3000);

salesStaff[6] = new Salesperson("Harry", "Taylor", 7300);

salesStaff[7] = new Salesperson("Andy", "Adams", 5000);

salesStaff[8] = new Salesperson("Jim", "Doe", 2850);

salesStaff[9] = new Salesperson("Walt", "Smith", 3000);

Sorting.insertionSort(salesStaff);

System.out.println (" Ranking of Sales for the Week ");

for (Salesperson s : salesStaff) System.out.println (s);

}

}

1. The file Numbers,java reads in an array of integers, invokes the selection sort algorithm to sort them, and then prints the sorted array. Save Sortingjava and Numbersjava to your directory. Numbers java won't compile in its current form. Study it to see if you can figure out why. Hint: Wrapper class of int 2. Try to compile Numbersjava and see what the error message is. The problem involves the difference between primitive data and objects. Change the program so it will work correctly (note: you don't need to make many changes the autoboxing feature of Java 1.5 will take care of most conversions from int to Integer when scan in data from keyboard). 3. Write a program Strings java, similar to Numbersjava, that reads in an array of String objects and sorts them. You may just copy and edit Numbers java. 4. Modify the insertionsort algorithm so that it sorts in descending order rather than ascending order. Change Numbers java and Stringsjava tocall insertionsort rather than selectionsort. Run both to make sure the sorting is correct. 5. The file Salesperson java partially defines a class that represents a sales person. This is very similar to the Contact class in our lecture. However, a sales person has a first name, last name, and a total number of sales (an int) rather than a first name, last name, and phone number. Complete the compareTo method in the Salesperson class. The comparison should be based on total sales; that is return a negative number if the executing object has total sales less than the other object and return a positive number if the sales are greater. Use the name of the sales person to break a tie (alphabetical order) 6. The file WeeklySales java contains a driver for testing the compareTo method and the sorting, Compile and run it. Make sure your compareTo method is correct. The sales staff should be listed in order of sales from most to least with the four people having the same number of sales in reverse alphabetical order