Thread: Java coding, solution needed

Implement a class Calculator with the method mentioned below.


Method Description
findAverage()
Calculate the average of three numbers
Return the average rounded off to two decimal digits
Test the functionalities using the provided Tester class.

Code:

class Calculator {

// Implement your code here
}

class Tester {

public static void main(String args[]) {
Calculator calculator = new Calculator();
// Invoke the method findAverage of the Calculator class and display the average
}
}

Implement the class Teacher based on the class diagram and description given below.

Method Description
Teacher(String teacherName, String subject, double salary)
Initialize the values of all the instance variables appropriately with the values passed
Create a Tester class. Create 4 objects of Teacher class. Create an array of type Teacher store the created objects and display the details of the teachers.


class Teacher {
//Implement your code here
}

class Tester {
public static void main(String[] args) {
// Implement your code here
}
}

Consider the class Employee given below for representing employees of an organization. It has 5 different instance variables and a method to calculate the total salary based on the jobLevel.

Salary is calculated in the calculateSalary() method.

Make necessary changes to the class by making all the attributes private and by adding necessary accessor and mutator methods thus bringing in Encapsulation.

class Employee {

String employeeId;
String employeeName;
int salary;
int bonus;
int jobLevel;

public void calculateSalary() {
if (this.jobLevel >= 4) {
this.bonus = 100;
} else {
this.bonus = 50;
}
this.salary += this.bonus;
}
}

class Tester {

public static void main(String args[]) {

Employee employee = new Employee();
employee.employeeId = "C101";
employee.employeeName = "Steve";
employee.salary = 650;
employee.jobLevel = 4;

employee.calculateSalary();

System.out.println("Employee Details");
System.out.println("Employee Id: " + employee.employeeId);
System.out.println("Employee Name: " + employee.employeeName);
System.out.println("Salary: " + employee.salary);

}
}