//EmployeeData.java

public class EmployeeData implements Comparable<EmployeeData>
{
    private String firstName; // First Name
    private String lastName;  // Last Name
    private Integer emplID;   // Employee ID
    private Integer deptNum;  // Department Number

    EmployeeData
    (
        String firstName,
        String lastName,
        Integer emplID,
        Integer deptNum
    )
    {
        this.firstName = firstName;
        this.lastName = lastName;
        this.emplID = emplID;
        this.deptNum = deptNum;
    }

    @Override
    public int compareTo(EmployeeData otherEmpl)
    {
        String fullName;      // Full name, this employee
        String otherFullName; // Full name, comparison employee
        int comparisonVal;    // Outcome of comparison

        // Compare based on department number first
        comparisonVal = deptNum.compareTo(otherEmpl.deptNum);

        // If in same organization, use name
        if (comparisonVal == 0)
        {
            fullName = lastName + firstName;
            otherFullName = otherEmpl.lastName + otherEmpl.firstName;
            comparisonVal = fullName.compareTo(otherFullName);
        }

        return comparisonVal;
    }

    @Override
    public String toString()
    {
        return lastName
               + " "
               + firstName
               + "       \tID: "
               + emplID
               + "\t\tDept. #: "
               + deptNum;
    }
}