Java Class Libraries - Company
#
public class Person
{
private int age;
private String firstName;
private String lastName;
private String nameString;
private String ageString;
public Person(String firstName, String lastName, int age)
{
this.age = age;
this.firstName = firstName;
this.lastName = lastName;
}
public void printName()
{
System.out.println(nameString);
}
public void printAge()
{
System.out.println(ageString);
}
public void printAgeGroup()
{
System.out.println(nameString);
System.out.println(ageString);
}
}
}
}
#
public class Employee
{
private double currentSalary;
private double newSalary;
private java.lang.String name;
public Employee()
{
name = "Last, First";
currentSalary = 0;
}
public Employee (String n)
{
name = n;
}
public String getName()
{
return name;
}
public double getSalary()
{
return currentSalary;
}
public Employee (String n, double cs)
{
name = n;
currentSalary = cs;
}
public void raiseSalary (double byPercent)
{
double newSalary = currentSalary * (1 + (byPercent/100));
}
public String toString()
{
String str = "";
str = "Name: " + name + "\n The salary of the employee is " + currentSalary +
"\n The empoyee's salary after the raise is " + ;
return str;
}
}
#
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.Set;
import java.util.TreeSet;
public class Company {
public static void main(String args[]) {
Employee emps[] = { new Employee("Finance", "Degree, Debbie"),
new Employee("Finance", "Grade, Geri"),
new Employee("Finance", "Extent, Ester"),
new Employee("Engineering", "Measure, Mary"),
new Employee("Engineering", "Amount, Anastasia"),
new Employee("Engineering", "Ratio, Ringo"),
new Employee("Sales", "Stint, Sarah"),
new Employee("Sales", "Pitch, Paula"),
new Employee("Support", "Rate, Rhoda"), };
Set set = new TreeSet(Arrays.asList(emps));
System.out.println(set);
Set set2 = new TreeSet(Collections.reverseOrder());
set2.addAll(Arrays.asList(emps));
System.out.println(set2);
Set set3 = new TreeSet(new EmpComparator());
for (int i = 0, n = emps.length; i < n; i++) {
set3.add(emps[i]);
}
System.out.println(set3);
}
}
class EmpComparator implements Comparator {
public int compare(Object obj1, Object obj2) {
Employee emp1 = (Employee) obj1;
Employee emp2 = (Employee) obj2;
int nameComp = emp1.getName().compareTo(emp2.getName());
return ((nameComp == 0) ? emp1.getDepartment().compareTo(
emp2.getDepartment()) : nameComp);
}
}
class Employee implements Comparable {
String department, name;
public Employee(String department, String name) {
this.department = department;
this.name = name;
}
public String getDepartment() {
return department;
}
public String getName() {
return name;
}
public String toString() {
return "[dept=" + department + ",name=" + name + "]";
}
public int compareTo(Object obj) {
Employee emp = (Employee) obj;
int deptComp = department.compareTo(emp.getDepartment());
return ((deptComp == 0) ? name.compareTo(emp.getName()) : deptComp);
}
public boolean equals(Object obj) {
if (!(obj instanceof Employee)) {
return false;
}
Employee emp = (Employee) obj;
return department.equals(emp.getDepartment())
&& name.equals(emp.getName());
}
public int hashCode() {
return 31 * department.hashCode() + name.hashCode();
}
}
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