Java Code

[RpTheHotrod]

Unfortunately I do not have access to a compiler right now, and I'm not sure yet how arrays work with java as I have not had the time to research it and we have not covered java arrays yet.

 

I'm trying to come up with a way that will allow multiple objects to be created via a loop with user input. Would something like this work, or will arrays not work with objects like this? I know the code is inefficient, but we're being asked to specifically do it this way.

 

 

 

 

import javax.swing.JOptionPane;

 

//Class

public class Employee_Tester

{

 

//Main Statement

public static void main(String[] args)

{

 

objArray = new int[11];

int x = 1;

 

 

//Creating Obj1 (no parameters)

Employee obj[x] = new Employee();

obj[x].setName("Susan Meyers");

obj[x].setDepartment("Accounting");

obj[x].setPosition("Vice President");

obj[x].setIdNumber(47899);

x++;

 

//Creating Obj2 (with paramaters)

Employee obj[x] = new Employee("Mark Jones", "IT", "Programmer",39119);

x++;

 

//Creating obj3 (by use of copy contructor)

Employee obj[x] = new Employee(new Employee("Joy Rogers", "Manufacturing", "Engineer",81774));

x++;

 

//Windows output window

JOptionPane.showMessageDialog(null, "Congratulations. You are successful to use object!");

char exit;

do

{

//Creating object for upcoming user input

Employee obj[x] = new Employee();

 

obj[x].setName(JOptionPane.showInputDialog("Please enter name."));

obj[x].setDepartment(JOptionPane.showInputDialog("Please enter the department."));

obj[x].setPosition(JOptionPane.showInputDialog("Please enter the position."));

String idNumStr = JOptionPane.showInputDialog("Please enter the id number.");

 

int idNumResult = Integer.parseInt(idNumStr);

obj[x].setIdNumber(idNumResult);

x++;

 

String _exit = JOptionPane.showInputDialog("Would you like to exit? Y/N");

 

exit = _exit.charAt(0);

}

 

while(!(exit == 'Y' || exit == 'y'));

 

 

System.exit(0);

}

 

}

[Hallucination]

You'll want to start x at 0, since that is where Java arrays start. If you did the do while loop properly you shouldn't need the System.exit(0) line, it should just end on its own.

 

Edit: You'll also want the array to be an array of Employees, not an array of integers. I'm a bit rusty with Java, but it should look something like:

Employee objArray = new Employee[11];

 

That would also mean that you don't have to declare the elements of objArray, you just have to assign them. I.E.

Employee obj[x] = new Employee();

would become:

objArray[x] = new Employee();

 

And lastly, you need to change all instances of obj[x] to objArray[x], otherwise you're referencing an array that doesn't exist.

 

I made all those changes, and the only error that is coming up is that I don't have an Employee class.

[RpTheHotrod]

You'll want to start x at 0, since that is where Java arrays start. If you did the do while loop properly you shouldn't need the System.exit(0) line, it should just end on its own.

 

Edit: You'll also want the array to be an array of Employees, not an array of integers. I'm a bit rusty with Java, but it should look something like:

Employee objArray = new Employee[11];

 

That would also mean that you don't have to declare the elements of objArray, you just have to assign them. I.E.

Employee obj[x] = new Employee();

would become:

objArray[x] = new Employee();

 

And lastly, you need to change all instances of obj[x] to objArray[x], otherwise you're referencing an array that doesn't exist.

 

I made all those changes, and the only error that is coming up is that I don't have an Employee class.

I agree but the instructor wants us to start with obj1. As for system exit we were instructed that when using the pane a system exit is mandatory. Odd.

 

Anyway I received thus response from someone.

 

 

 

You can declare an array of objects using:

Employee[] obj = new Employee[10];

substituting 10 for however many Employee objects you want to create

 

After declaring the array, you can assign each one a value by using

obj[x] = new Employee();

 

You can't have a variable in the variable name at declaration. obj[x] doesn't turn into obj1 where you say "creating obj1," unfortunately.

 

That objArray needs an int[] in front of it too.

int[] objArray = new int[11];

 

Other than that it seems fine.

[RpTheHotrod]

You'll want to start x at 0, since that is where Java arrays start. If you did the do while loop properly you shouldn't need the System.exit(0) line, it should just end on its own.

 

Edit: You'll also want the array to be an array of Employees, not an array of integers. I'm a bit rusty with Java, but it should look something like:

Employee objArray = new Employee[11];

 

That would also mean that you don't have to declare the elements of objArray, you just have to assign them. I.E.

Employee obj[x] = new Employee();

would become:

objArray[x] = new Employee();

 

And lastly, you need to change all instances of obj[x] to objArray[x], otherwise you're referencing an array that doesn't exist.

 

I made all those changes, and the only error that is coming up is that I don't have an Employee class.

 

Just saw your edit

 

So how's this:

 

 

Here's the Employee Class

//Class Header
public class Employee 
	{
		//data members
		private String name, department, position;
		private int idNumber;

		//default constructor
		public Employee()
		{
			name = "";
			department = "";
			position = "";
			idNumber = 0;
		}

		//parameter constructor
		public Employee(String _name, String _department, String _position, int _idNumber)
		{
			name = _name;
			department = _department;
			position = _position;
			idNumber = _idNumber;
		}

		//copy constructor
		public Employee(Employee constructor)
		{
			name = constructor.name;
			department = constructor.department;
			position = constructor.position;
			idNumber = constructor.idNumber;

		}

		//Mutator Methods
		public void setName(String _name)
		{
			name = _name;
		}

		public void setDepartment(String _department)
		{
			department = _department;
		}

		public void setPosition(String _position)
		{
			position = _position;
		}

		public void setIdNumber(int _idNumber)
		{
			idNumber = _idNumber;
		}


		//Accessor methods
		public String getName()
		{
			return name;
		}

		public String getDepartment()
		{
			return department;
		}

		public String getPosition()
		{
			return position;
		}

		public int getIdNumber()
		{
			return idNumber;
		}

		public String toString()
		{
			String str = "Name: " + name + "\nDepartment: " + department +
						"\nPosition: " + position + "\nidNumber: " + idNumber;
			return str;
		}
	}

 

Actual Program

import javax.swing.JOptionPane;

//Class
public class Employee_Tester 
{

//Main Statement
public static void main(String[] args) 
{

	int x = 1;

	Employee[] obj = new Employee[11];

	obj[x] = new Employee();
	obj[x].setName("Susan Meyers");
	obj[x].setDepartment("Accounting");
	obj[x].setPosition("Vice President");
	obj[x].setIdNumber(47899);
	x++;

	//Creating Obj2 (with paramaters)
	obj[x] = new Employee("Mark Jones", "IT", "Programmer",39119);
	x++;

	//Creating obj3 (by use of copy contructor)
	obj[x] = new Employee(new Employee("Joy Rogers", "Manufacturing", "Engineer",81774));
	x++;

	//Windows output window
	JOptionPane.showMessageDialog(null, "Congratulations. You are successful to use object!");
	char exit;

	do
	{
	//Creating object for upcoming user input
	obj[x] = new Employee();

	obj[x].setName(JOptionPane.showInputDialog("Please enter name."));
	obj[x].setDepartment(JOptionPane.showInputDialog("Please enter the department."));
	obj[x].setPosition(JOptionPane.showInputDialog("Please enter the position."));
	String idNumStr = JOptionPane.showInputDialog("Please enter the id number.");

	int idNumResult = Integer.parseInt(idNumStr);
	obj[x].setIdNumber(idNumResult);
	x++;

	String _exit = JOptionPane.showInputDialog("Would you like to exit? Y/N");

	exit = _exit.charAt(0);
	}

	while(!(exit == 'Y' || exit == 'y'));


	System.exit(0);
}

}

[Hallucination]

Alright, just copypasta'd the employee class in, and my code is running fine. I did the same with yours, it's working.

 

And ignore what I said about the System.exit bit, there's a reason I hate UI programming.

[RpTheHotrod]

I decided to try an input tester. The program seems to run fine and as intended, but for some reason I get an error that says "exception in thread main". I don't see any issues, though. The program runs as intended, there's no compiler errors. Everything seems normal. Any ideas?

 

 

 

import javax.swing.JOptionPane;

//Class
public class Employee_Tester 
{

//Main Statement
public static void main(String[] args) 
{

	int x = 1;

	Employee[] obj = new Employee[11];

	obj[x] = new Employee();
	obj[x].setName("Susan Meyers");
	obj[x].setDepartment("Accounting");
	obj[x].setPosition("Vice President");
	obj[x].setIdNumber(47899);
	x++;

	//Creating Obj2 (with paramaters)
	obj[x] = new Employee("Mark Jones", "IT", "Programmer",39119);
	x++;

	//Creating obj3 (by use of copy contructor)
	obj[x] = new Employee(new Employee("Joy Rogers", "Manufacturing", "Engineer",81774));
	x++;

	//Windows output window
	JOptionPane.showMessageDialog(null, "Congratulations. You are successful to use object!");
	char exit;

	do
	{
	//Creating object for upcoming user input
	obj[x] = new Employee();

	obj[x].setName(JOptionPane.showInputDialog("Please enter name."));
	obj[x].setDepartment(JOptionPane.showInputDialog("Please enter the department."));
	obj[x].setPosition(JOptionPane.showInputDialog("Please enter the position."));
	String idNumStr = JOptionPane.showInputDialog("Please enter the id number.");

	//Convert input String to Int
	int idNumResult = Integer.parseInt(idNumStr);
	obj[x].setIdNumber(idNumResult);
	x++;

	//Option to continue the loop or exit
	String _exit = JOptionPane.showInputDialog("Would you like to continue? Y/N");
	exit = _exit.charAt(0);
	}

	while(exit == 'Y' || exit == 'y');

	//Testing input
	for(int counter = 1; counter <= x; counter++)

		JOptionPane.showMessageDialog(null, obj[counter].toString());

	System.exit(0);
}

}

[RpTheHotrod]

I fixed it. Silly me with a typo.

 

 

//Testing input

for(int counter = 1; counter < x; counter++)

 

JOptionPane.showMessageDialog(null, obj[counter].toString());

 

System.exit(0);