An incomplete Java program named Hw1_P1_incomplete.java is posted

on the course website. You must complete the program by implementing the following

requirements. Don't forget to delete "_incomplete" from the file name.

This program has three methods. The first method receives an array of integers and calculates the

average, the minimum, and the maximum of the integers and prints them on the screen.

The signature of this method is:

public static void stats(int[ ] numbers)

The second method creates and prints a subarray of a given array. The specification of the method

is:

Signature of method:

public static void subarray(int[ ] a, int from, int to)

Input arguments:

a: An array of integers

from: The index of an element in a which becomes the first element in the subarray

to: The index of an element in a which becomes the last element in the subarray

Behavior:

A new integer array is created, which is a subarray of a, and it includes elements

a[from] to a[to], inclusively.

Prints the subarray.

There is no return value.

The third method is a main method. If you run this program with the following main method:

public static void main(String[] args) {

int[] a = {15, 25, 10, 65, 30, 55, 65};

System.out.print(" Given array is: ");

for (int i=0; i

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

}

System.out.print(a[a.length 1]);

System.out.println();

stats(a);

subarray(a, 1, 4);

Your output should be:

Given array is: 15, 25, 10, 65, 30, 55, 65

average = 37.86, min = 10, max = 65

The subarray, from index 1 to index 4, is: 25, 10, 65, 30

Problem 2 (50 points). For this problem, first you need to write subclass of the Employee

class. The definition of the Employee class is in the Employee.java file and it is briefly described

below:

Class Employee

Instance variables

empId:

Description: Employee id of an employee

Type: integer

name:

Description: Name of an employee

Type: String

Instance methods:

getEmpId

No input argument

Returns the employee id

getName

No input argument

Returns the employee name

setEmpId

Input argument: empId of integer type

Existing empId is replaced with the given empId

No return value

setName

Input argument: name of String type

Existing name (which may be null) is replaced with the given name

No return value

You need to implement the following class, which is a subclass of the Employee class. Define

this class in a separate file named SalariedEmployee.java.

Class SalariedEmployee

A subclass of the Employee class

Instance variables

salary: annual salary; double type

Instance method

monthlyPayment

No input argument

Returns monthly payment; double type

Monthly payment is calculated as salary / 12

employeeInfo

No input argument

Displays the empId, name, salary, and monthly payment

No return value

In the subclass definition, you must implement all necessary get methods and set methods.

Then, write program, named Hw1_P2.java, that reads employee information from a text file

and stores SalariedEmployee objects in an array of size 10, named employeeArray, and displays

employees satisfying a certain criterion. Follow the instruction below:

Write method, named employeesAbove, whose behavior is specified below:

Signature of method:

public static void employeesAbove (SalariedEmployee[ ] empArray, double

threshold)

Input arguments:

empArray: An array of SalariedEmployee objects

threshold: A salary threshold

Behavior: Selects from empArray only those employees who earn more than the

given threshold amount, and displays their empId, name, salary, and monthly

payment.

There is no return value.

In the main method, do the following:

Read information of 10 salaried employees from an input file named

employee_input.txt and create 10 SalariedEmployee objects and store them in

employeeArray. A sample input file is shown below:

1, John, 50000

2, Susan, 120000

3, Yapsiong, 80000

4, Gomez, 90000

5, Minsky, 60000

6, Yorst, 30000

7, Govindranad, 40000

8, Kelsey, 60000

9, Jake, 110000

10, Guanyu, 70000

Invoke the employeesAbove method a few times with different threshold values and

check that your output is correct. If, for example, you invoke the method with the

threshold 70000, then the output should be:

Employees earning more than $70000:

Employee id = 2

Name = Susan

Salary = 120000.00

Monthly pay = 10000.00

Employee id = 3

Name = Yapsiong

Salary = 80000.00

Monthly pay = 6666.67

Employee id = 4

Name = Gomez

Salary = 90000.00

Monthly pay = 7500.00

Employee id = 9

Name = Jake

Salary = 110000.00

Monthly pay = 9166.67

Deliverable

No separate documentation is needed for the program files. However, you must include the

following in your source code:

Include the following comments above each method:

Brief description of the method

Input arguments

Output arguments

Include inline comments within your source code to increase readability of your code and

to help readers better understand your code.

You must submit the following files:

Hw1_P1.java

SalariedEmployee.java

Hw1_P2.java

GIVEN EMPLOYEE INPUT

1, John, 50000

2, Susan, 120000

3, Yapsiong, 80000

4, Gomez, 90000

5, Minsky, 60000

6, Yorst, 30000

7, Govindranad, 40000

8, Kelsey, 60000

9, Jake, 110000

10, Guanyu, 50000

INCOMPLETE JAVA

public class Hw1_part1 {

public static void stats(int[] a) {

// complete this method

}

public static void subarray(int[] a, int from, int to) {

// error check w/o using Java's exception handling

if (from < 0 || to >= a.length) {

System.out.println("Index out of bound");

return;

}

// complete this method

}

public static void main(String[] args) {

// test

int[] a = {15, 25, 10, 65, 30, 55, 65};

System.out.println(" Given array is: " + Arrays.toString(a));

stats(a);

subarray(a, 1, 4);

// test with other arrays

}

}