Question

JAVA

Write a comment on each method

1.Write a class Employee that includes the following hidden (private) attributes: name (String), department (String) and salary (double). Create a setter and a getter for each of them. The setter of salary is override by another one that gets bonus parameter (as percentage). The class includes a static and public member count (int) that represents the number of created Employee objects that incremented automatically after each created one then create a getter for it.

2.Crate main classes that achieve the following:
a. Create an array of 10 Employee objects, created permanently, read by Scanner and read by JOptionPane, (one program for each).
b. Access the objects for bonus using the formula: salary = salary * bonus (e.g. bonus = 1.2)
c. Sort the objects by name and salary, (one program for each)
d. Show the sorted Employee data using Command Line, JOptionPane, (one program for each).
e. Access the number of objects by the count member

Answer 1

Employee.java

package HomeworkLib3;

public class Employee {
  
   private String name;
   private String department;
   private double salary;
  
   static int count;
  
   public void setName(String name){
       this.name = name;
   }
  
   public String getName(){
       return name;
   }
  
   public void setDepartment(String dept){
       department = dept;
   }
  
   public String getDepartment(){
       return department;
   }
  
   public void setSalary(double salary){
       this.salary = salary;
   }
  
   public double getSalary(){
       return salary;
   }
  
   public void setSalary(double salary, double bonus){
       this.salary = salary*bonus;
   }
  
   public static int getCount(){
       return count;
   }

}

MainSName.java

package HomeworkLib3;

import java.util.Scanner;

public class MainSName {
  
   public static void main(String args[]){
       Employee emp[] = new Employee[10];
      
       for(int i=0;i<10;i++)
           emp[i] = new Employee();
      
       // reading from console
       Scanner sc = new Scanner(System.in);
       for(int i=0;i<10;i++){
           System.out.println("Enter employee name");
           emp[i].setName(sc.nextLine());
           System.out.println("Enter department");
           emp[i].setDepartment(sc.nextLine());
           System.out.println("Enter Salary");
           emp[i].setSalary(Double.parseDouble(sc.nextLine()));
       }
      
       //accessing salary with bonus
       for(int i=0;i<10;i++)
           emp[i].setSalary(emp[i].getSalary(), i);
      
       // sorting with name
       for(int i=0;i<10;i++){
           for(int j=0;j<(9-i);j++){
               if(emp[j].getName().compareToIgnoreCase(emp[j+1].getName()) > 0){
                   Employee temp = emp[j];
                   emp[j] = emp[j+1];
                   emp[j+1] = temp;
               }
           }
       }
      
       // Printing all employees details
       for(int i=0;i<10;i++){
           System.out.println("Employee "+i+":::");
           System.out.println("Name "+emp[i].getName());
           System.out.println("Department "+emp[i].getDepartment());
           System.out.println("Salary "+emp[i].getSalary());
       }
      
       System.out.println("No.of employees "+Employee.count);
   }

}

MainSSalary.java

package HomeworkLib3;

import java.util.Scanner;

public class MainSSalary {
  
   public static void main(String args[]){
       Employee emp[] = new Employee[10];
       for(int i=0;i<10;i++){
           emp[i] = new Employee();
           Employee.count++;
       }
      
       //reading from console
       Scanner sc = new Scanner(System.in);
       for(int i=0;i<10;i++){
           System.out.println("Enter employee name");
           emp[i].setName(sc.nextLine());
           System.out.println("Enter department");
           emp[i].setDepartment(sc.nextLine());
           System.out.println("Enter Salary");
           emp[i].setSalary(Double.parseDouble(sc.nextLine()));
       }
      
       //accessing salary with bonus
       for(int i=0;i<10;i++)
           emp[i].setSalary(emp[i].getSalary(), i);
      
      
       //sorting with salary
       for(int i=0;i<10;i++){
           for(int j=0;j<(9-i);j++){
               if(emp[j].getSalary() > emp[j+1].getSalary()){
                   Employee temp = emp[j];
                   emp[j] = emp[j+1];
                   emp[j+1] = temp;
               }
           }
       }
      
       //printing all the employee details
       for(int i=0;i<10;i++){
           System.out.println("Employee "+i+":::");
           System.out.println("Name "+emp[i].getName());
           System.out.println("Department "+emp[i].getDepartment());
           System.out.println("Salary "+emp[i].getSalary());
       }
      
       System.out.println("No.of employees "+Employee.count);
   }

}

MainOptionPane1.java

package HomeworkLib3;

import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class MainOptionPane1 {
  
   static JFrame f = new JFrame();
  
   public static void main(String args[]){
       Employee emp[] = new Employee[10];
       for(int i=0;i<10;i++){
           emp[i] = new Employee();
           Employee.count++;
       }
      
       for(int i=0;i<10;i++){
           emp[i].setName(JOptionPane.showInputDialog("Employee Name"));
           emp[i].setDepartment(JOptionPane.showInputDialog("Employee Department"));
           emp[i].setSalary(Double.parseDouble(JOptionPane.showInputDialog("Employee Salary")));
       }
      
       for(int i=0;i<10;i++)
           emp[i].setSalary(emp[i].getSalary(), i);
      
       for(int i=0;i<10;i++){
           for(int j=0;j<(9-i);j++){
               if(emp[j].getName().compareToIgnoreCase(emp[j+1].getName()) > 0){
                   Employee temp = emp[j];
                   emp[j] = emp[j+1];
                   emp[j+1] = temp;
               }
           }
       }

       String msg="";
       for(int i=0;i<10;i++){
           msg+="Name "+emp[i].getName()+" Department:"+emp[i].getDepartment()+" Salary:"+emp[i].getSalary()+"\n";
       }
       JOptionPane.showMessageDialog(f, msg);
      
       JOptionPane.showMessageDialog(f, "No. of Employees "+Employee.count);
   }

}

MainOptionPane2.java

package HomeworkLib3;

import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class MainOptionPane2 {
  
   static JFrame f;
  
   public static void main(String args[]){
       f = new JFrame();
       Employee emp[] = new Employee[10];
       for(int i=0;i<10;i++){
           emp[i] = new Employee();
           Employee.count++;
       }
      
       for(int i=0;i<10;i++){
           emp[i].setName(JOptionPane.showInputDialog("Employee Name"));
           emp[i].setDepartment(JOptionPane.showInputDialog("Employee Department"));
           emp[i].setSalary(Double.parseDouble(JOptionPane.showInputDialog("Employee Salary")));
       }
      
       for(int i=0;i<10;i++)
           emp[i].setSalary(emp[i].getSalary(), i);
      
       for(int i=0;i<10;i++){
           for(int j=0;j<(9-i);j++){
               if(emp[j].getSalary() > emp[j+1].getSalary()){
                   Employee temp = emp[j];
                   emp[j] = emp[j+1];
                   emp[j+1] = temp;
               }
           }
       }
      
       String msg="";
       for(int i=0;i<10;i++){
           msg+="Name "+emp[i].getName()+" Department:"+emp[i].getDepartment()+" Salary:"+emp[i].getSalary()+"\n";
       }
       JOptionPane.showMessageDialog(f, msg);
      
       JOptionPane.showMessageDialog(f, "No. of Employees "+Employee.count);
   }

}

MainSName.java --> Console reading & Sorting with Name

MainSSalary.java --> Console reading & Sorting with Salary

MainOptionPane1 --> reading via JOptionPane & Sorting with Name

MainOptionPane2 --> reading via JOptionPane & Sorting with Salary