Help please Depts file https://www.dropbox.com/s/ojl315sjc6bvc7e/Depts.txt?dl=0
ID: 3812858 • Letter: H
Question
Help please
Depts file
https://www.dropbox.com/s/ojl315sjc6bvc7e/Depts.txt?dl=0
Emps file
https://www.dropbox.com/s/x81dtemv403fblk/Emps.dat?dl=0
Object oriented and GUI Programming The objectives of this assignment are to: 1) Gain experience using the Eclipse IDE; including its environment for managing 2) Gain an understanding of processing both text and binary files. 3) Gain experience in using data structures to hold data in memory. 4) Develop a small Java program that applies the concepts of objectives 2 and 3 5) Practice good programming techniques.Explanation / Answer
import java.io.*;
import java.lang.*;
import java.util.ArrayList;
import java.math.BigInteger;
public class Test{
static String emp_file_name = "Emps.dat";
static String dept_file_name = "Depts.txt";
public static void main(String []args){
ArrayList<Department> depts = readDepartmentData();
ArrayList<Employee> emps = readEmployeeData();
System.out.println("depts : " + depts.size());
System.out.println("emps : " + emps.size());
}
// read department data from file
static ArrayList<Department> readDepartmentData() {
ArrayList<Department> depts = new ArrayList<Department>();
try{
FileInputStream fstream = new FileInputStream(dept_file_name);
DataInputStream in = new DataInputStream(fstream);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String strLine;
while ((strLine = br.readLine()) != null) {
String[] tokens = strLine.split(",");
depts.add( new Department(tokens[0], tokens[1], Integer.parseInt(tokens[2])));
}
in.close();
}catch (Exception e){
System.err.println("Error: " + e.getMessage());
}
return depts;
}
// read employee data from file
static ArrayList<Employee> readEmployeeData() {
ArrayList<Employee> emps = new ArrayList<Employee>();
try{
FileInputStream fstream = new FileInputStream(emp_file_name);
DataInputStream in = new DataInputStream(fstream);
while (in.available() > 0) {
byte[] emp_id = new byte[4];
in.read(emp_id);
byte[] emp_fname = new byte[10];
in.read(emp_fname);
byte[] emp_lname = new byte[10];
in.read(emp_lname);
byte[] dpt_code = new byte[2];
in.read(dpt_code);
byte[] h_mon = new byte[1];
in.read(h_mon);
byte[] h_day = new byte[1];
in.read(h_day);
byte[] h_yr = new byte[2];
in.read(h_yr);
String emp_type = "" + (char)in.readByte();
double salary = in.readDouble();
double hourly_rate = in.readDouble();
byte[] v_days = new byte[2];
in.read(v_days);
byte training = in.readByte();
emps.add(new Employee(new BigInteger(emp_id).intValue(), new String(emp_fname).trim(), new String(emp_lname).trim(), new String(dpt_code).trim(),
new BigInteger(h_mon).intValue() + "/" + new BigInteger(h_day).intValue() + "/" + new BigInteger(h_yr).intValue(), new String(emp_type).trim(),
salary, hourly_rate, new BigInteger(v_days).intValue(), training));
System.out.println(new BigInteger(emp_id).intValue() + " | " + new String(emp_fname).trim() + " | " + new String(emp_lname).trim() + " | " + new String(dpt_code).trim() +
" | " + new BigInteger(h_mon).intValue() + "/" + new BigInteger(h_day).intValue() + "/" + new BigInteger(h_yr).intValue() + " | " + emp_type +
" | " + salary + " | " + hourly_rate + " | " + new BigInteger(v_days).intValue() + " | " + training);
}
in.close();
}catch (Exception e){
System.err.println("Error: " + e.getMessage());
}
return emps;
}
}
// Employee model to store information of employee
class Employee {
int emp_id, vacation_days;
String first_name, last_name, dpt_code, hire_date, emp_type;
double salary, hourly_rate;
byte training;
public Employee() {
}
public Employee(int emp_id, String first_name, String last_name, String dpt_code, String hire_date, String emp_type, double salary, double hourly_rate, int vacation_days, byte training) {
this.emp_id = emp_id;
this.first_name = first_name;
this.last_name = last_name;
this.dpt_code = dpt_code;
this.hire_date = hire_date;
this.emp_type = emp_type;
this.salary = salary;
this.hourly_rate = hourly_rate;
this.vacation_days = vacation_days;
this.training = training;
}
public int getEmp_id() {
return emp_id;
}
public int getVacation_days() {
return vacation_days;
}
public String getFirst_name() {
return first_name;
}
public String getLast_name() {
return last_name;
}
public String getDpt_code() {
return dpt_code;
}
public String getHire_date() {
return hire_date;
}
public String getEmp_type() {
return emp_type;
}
public double getSalary() {
return salary;
}
public double getHourly_rate() {
return hourly_rate;
}
public byte getTraining() {
return training;
}
}
// Department model to store information of department
class Department {
private int emp_id;
private String dpt_code, dpt_name;
public Department() {
}
public Department(String dpt_code, String dpt_name, int emp_id) {
this.dpt_code = dpt_code;
this.dpt_name = dpt_name;
this.emp_id = emp_id;
}
public int getEmp_id() {
return emp_id;
}
public String getDpt_code() {
return dpt_code;
}
public String getDpt_name() {
return dpt_name;
}
}
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