practical quiz 6.employeearray.java

son los ejercicios de ssd3 espero que les ayuden a algunos jeje se la pasan chido.....!!!!!!

/**
 * This class contains methods to process arrays of {@link Employee} objects.
 * 
 * @author Neil
 * @version 1.0.0
 * @see Employee
 */
public class EmployeeArray {

	/**
	 * Creates an array with three objects of class {@link Employee}.
	 * <p>
	 * The first element of the array is the object <code>first</code>, the
	 * second element of the array is the object <code>second</code>, and the
	 * third element of the array is the object <code>third</code>.
	 * </p>
	 * 
	 * @param first
	 *            a {@link Employee} object.
	 * @param second
	 *            a {@link Employee} object.
	 * @param third
	 *            a {@link Employee} object.
	 * @return an array with the objects <code>first</code>,
	 *         <code>second</code>, and <code>third</code>.
	 */
	public static Employee[] makeArray(Employee first, Employee second,
			Employee third) {
		return new Employee[] { first, second, third };
	}

	/**
	 * Creates a new array from the specified array of {@link Employee} objects.
	 * <p>
	 * The elements in the new array have the same order as those in the
	 * specified array.
	 * </p>
	 * 
	 * @param array
	 *            an array that contains objects of class {@link Employee}.
	 * @return a <i>new</i> array of the objects in the specified array.
	 */
	public static Employee[] copyArray(Employee[] array) {
		Employee[] temp = new Employee[array.length];
		for (int i = 0; i < array.length; i++)
			temp[i] = array[i];
		return temp;
	}

	/**
	 * Returns the {@link Employee} object with the specified ID.
	 * 
	 * @param array
	 *            an array that contains objects of class {@link Employee}.
	 * @param id
	 *            an employee ID.
	 * @return The {@link Employee} object with the specifed ID. Returns
	 *         <code>null</code> if there are no employees in the specified
	 *         array with the specifed ID.
	 */
	public static Employee getEmployee(Employee[] array, int id) {
		if (array.length == 0)
			return null;
		for (Employee e : array) {
			if (e.getId() == id)
				return e;
		}
		return null;
	}

	/**
	 * Returns the number of employees whose salary is higher than the specified
	 * dollar amount.
	 * 
	 * @param array
	 *            an array that contains objects of class {@link Employee}.
	 * @param amount
	 *            a dollar amount.
	 * @return the number of employees whose salary is higher than the specified
	 *         dollar amount.
	 */
	public static int countHigherSalaries(Employee[] array, double amount) {
		if (array.length == 0)
			return 0;
		int count = 0;
		for (Employee e : array) {
			if (e.getSalary() > amount)
				count++;
		}
		return count;
	}

	/**
	 * Returns the sum of the salaries of the employees in the specified array.
	 * 
	 * @param array
	 *            an array that contains objects of class {@link Employee}.
	 * @return the sum of the salaries of the employees in the specified array.
	 */
	public static double sumSalaries(Employee[] array) {
		if (array.length == 0)
			return 0.0;
		double result = 0;
		for (Employee e : array) {
			result += e.getSalary();
		}
		return result;
	}

	/**
	 * Obtains the highest salary in the specified array.
	 * 
	 * @param array
	 *            an array that contains objects of class {@link Employee}.
	 * @return the highest salary in the specified array.
	 */
	public static double getHighestSalary(Employee[] array) {
		double result = array[0].getSalary();
		for (Employee e : array) {
			if (e.getSalary() > result)
				result = e.getSalary();
		}
		return result;
	}

	/**
	 * Increases the salary of every employee in the specified array by the
	 * specified amount.
	 * 
	 * @param array
	 *            an array that contains objects of class {@link Employee}.
	 */
	public static void increaseAll(Employee[] array, double amount) {
		if (array.length == 0)
			return;
		for (Employee e : array) {
			e.setSalary(e.getSalary() + amount);
		}
	}

	/**
	 * Returns a string representation of the specified {@link Employee} array.
	 * <p>
	 * Uses the method <code>toString</code> in class <code>Employee</code>
	 * to obtain the string representation of each object in the array.
	 * </p>
	 * A new line character ( \n ) separates the string representations of each
	 * <code>Employee</code> object. For example:
	 * </p>
	 * 
	 * <pre>
	 * Employee[102,Mary Jones,68250.0]\n
	 * Employee[101,Joe Smith,36000.0]\n
	 * Employee[103,Richard Wong,92175.0]
	 * </pre>
	 * 
	 * <p>
	 * Note that the string returned does <i>not</i> end with a new line
	 * character (\n).
	 * </p>
	 * <p>
	 * This method assumes that every element in the specified array contains a
	 * valid reference to an <code>Employee</code> object.
	 * </p>
	 * 
	 * @param array
	 *            an array that contains objects of class {@link Employee}.
	 * @return the string representation of the specified array
	 */
	public static String displayAll(Employee[] array) {
		if (array.length == 0)
			return "";
		String result = "";
		for (int i = 0; i < array.length; i++) {
			result += "Employee[" + array[i].getId() + "," + array[i].getName()
					+ "," + array[i].getSalary() + "]";
			if (i < array.length - 1)
				result += "\n";
		}
		return result;
	}
}