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FileOperations.java
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FileOperations.java
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package BudgetTracker;
import java.io.*;
import java.util.ArrayList;
import java.util.StringTokenizer;
public class FileOperations {
File logBookFile;
File passWord = new File("C:\\Users\\Jay Patel\\IdeaProjects\\JavaLearn\\CompetitiveJava\\src\\BudgetTracker\\password.txt");
public void updateLogBook(int budget, int expense, String date, String item, int cost) throws IOException {
logBookFile = new File("C:\\Users\\Jay Patel\\IdeaProjects\\JavaLearn\\CompetitiveJava\\src\\BudgetTracker\\logbook.txt" + getMonthYearName(date) + ".txt");
FileWriter writer = new FileWriter(logBookFile,true);
BufferedWriter br = new BufferedWriter(writer);
if(item == "nil")
date = "nil";
br.append(budget + "\t" + expense + "\t" + date + "\t" + item + "\t" + cost );
br.newLine();
br.close();
}
public String getPassWord() throws IOException {
if (passWord.length() == 0)
System.out.print("\nPlease check the Password file for errors");
FileReader read = new FileReader(this.passWord);
BufferedReader rd = new BufferedReader(read);
//reading password and returning it
String pass = rd.readLine().toString().trim();
rd.close();
return pass;
}
public ArrayList<Log> getLog(String date) throws IOException{
logBookFile = new File("C:\\Users\\Jay Patel\\IdeaProjects\\JavaLearn\\CompetitiveJava\\src\\BudgetTracker\\logbook.txt" + getMonthYearName(date)+ ".txt");
FileReader read = new FileReader(logBookFile);
BufferedReader rd = new BufferedReader(read);
String temp = new String();
//data object to an array list
ArrayList<Log> list1 = new ArrayList<Log>();
while ((temp = rd.readLine()) != null){
Log log = new Log();
StringTokenizer st = new StringTokenizer(temp, "\t");
String[] str = new String[5];
int i =0;
while (st.hasMoreTokens()){
str[i] = st.nextToken();
i++;
}
if (str[2].toString().equals(date)){
log.setDate(str[2]);
log.setItem(str[3]);
//This code checks whether str[4] is null before trying to parse it as an integer. If it is null, the setCost method is not called, and the error is avoided.
if (str[4] != null) {
log.setCost(Integer.parseInt(str[4]));
}
list1.add(log);
}
}
rd.close();
return list1;
}
private String getMonthYearName(String date){
String name = "";
if (date.length() == 7)
date = "00/".concat(date);
StringTokenizer st = new StringTokenizer(date, "/");
int i = 0;
String[] arr = new String[3];
while (st.hasMoreTokens()){
arr[i] = st.nextToken();
i++;
}
if (date.length() == 10)
name = arr[1].toString().concat(arr[2].toString());
else if (date.length() == 8) {
name = arr[0].toString().concat(arr[1].toString());
}
return name;
}
public ArrayList<Log> getMonthLog(String date) throws IOException{
logBookFile = new File("C:\\Users\\Jay Patel\\IdeaProjects\\JavaLearn\\CompetitiveJava\\src\\BudgetTracker\\logbook.txt" + getMonthYearName(date) + ".txt");
FileReader read = new FileReader(logBookFile);
BufferedReader rd = new BufferedReader(read);
String temp = new String();
ArrayList<Log> list1 = new ArrayList<Log>();
while ((temp = rd.readLine()) != null){
Log log = new Log();
StringTokenizer st = new StringTokenizer(temp,"\t");
String[] str = new String[5];
int i = 0;
while (st.hasMoreTokens()){
str[i] = st.nextToken();
i++;
}
log.setDate(str[2]);
log.setItem(str[3]);
if (str[4] != null) {
log.setCost(Integer.parseInt(str[4]));
}
list1.add(log);
}
rd.close();
return list1;
}
public String getBudgetDate(String date) throws IOException{
logBookFile = new File("C:\\Users\\Jay Patel\\IdeaProjects\\JavaLearn\\CompetitiveJava\\src\\BudgetTracker\\logbook.txt" + getMonthYearName(date) + ".txt");
if (!logBookFile.exists()){
logBookFile.createNewFile();
}
FileReader read = new FileReader(logBookFile);
BufferedReader rd = new BufferedReader(read);
String budgetData = null;
String line, last = null;
if (rd.readLine() == null){
budgetData = null;
}else {
while ((line = rd.readLine()) != null){
last = line;
}
String[] arr = new String[5];
int i = 0;
StringTokenizer st = new StringTokenizer(last, "\t");
while (st.hasMoreTokens()){
arr[i] = st.nextToken();
i++;
}
budgetData = arr[0].toString().concat(" "+arr[1].toString());
}
rd.close();
return budgetData;
}
public void resetBudget(String date,int budget) throws IOException{
String last = "";
String line = "";
logBookFile = new File("C:\\Users\\Jay Patel\\IdeaProjects\\JavaLearn\\CompetitiveJava\\src\\BudgetTracker\\logbook.txt"+getMonthYearName(date)+".txt");
FileReader read = new FileReader(logBookFile);
BufferedReader rd = new BufferedReader(read);
while ((line = rd.readLine()) != null){
last = line;
}
StringTokenizer st = new StringTokenizer(last,"\t");
int i=0;
String[] arr = new String[5];
while (st.hasMoreTokens()){
arr[i] = st.nextToken();
i++;
}
rd.close();
RandomAccessFile f = new RandomAccessFile("logbook" + getMonthYearName(date) + ".txt","rw");
long length = f.length();
if (length >= 0) {
f.seek(length);
int b = f.read();
if (b == 10) {
f.setLength(length - 1);
}
}
// byte b;
// do {
// length -= 1;
// f.seek(length);
// b = f.readByte();
// }while (b !=10 && length>0);
// if (length == 0){
// f.setLength(length);
// }else {
// f.setLength(length + 1);
// }
f.close();
if (arr[4] != null) {
updateLogBook(budget, Integer.parseInt(arr[1].toString()), arr[2], arr[3], Integer.parseInt(arr[4].toString()));
}
// updateLogBook(budget, Integer.parseInt(arr[1].toString()),arr[2],arr[3],Integer.parseInt(arr[4].toString()));
}
public void deleteLog(String date) {
logBookFile = new File("C:\\Users\\Jay Patel\\IdeaProjects\\JavaLearn\\CompetitiveJava\\src\\BudgetTracker\\logbook.txt" + getMonthYearName(date) + ".txt");
boolean success = logBookFile.delete();
if (success) {
System.out.print("\nFile Deleted Successfully !");
} else {
System.out.print("\nFile for the particular month does not exist or could not be deleted !");
}
}
/*public void deleteLog(String date){
logBookFile = new File("C:\\Users\\Jay Patel\\IdeaProjects\\JavaLearn\\CompetitiveJava\\src\\BudgetTracker\\logbook.txt" + getMonthYearName(date) + ".txt");
boolean bool = true;
if (bool == true){
System.out.print("\nFile Deleted Successfully !");
}else
System.out.print("\nFile for the particular month does not exist !");
}*/
public void setPassWord(String passWord) throws IOException {
FileWriter writer = new FileWriter("C:\\Users\\Jay Patel\\IdeaProjects\\JavaLearn\\CompetitiveJava\\src\\BudgetTracker\\password.txt");
BufferedWriter br = new BufferedWriter(writer);
br.write(passWord);
br.close();
System.out.println("\nYour password has been changed!");
/*RandomAccessFile f = new RandomAccessFile("password.txt","rw");long length = f.length()-1;
byte b;
do {
length -= 1;
f.seek(length);
b = f.readByte();
}while (b != 10 && length>0);
if (length == 0){
f.setLength(length);
}else {
f.setLength(length + 1);
}
f.close();
// writing the new pass using buffer reader
FileWriter writer = new FileWriter(this.passWord,true);
BufferedWriter br = new BufferedWriter(writer);
br.write(passWord);
br.close();
System.out.print("\nYour password has been changed!");*/
}
public String getBudgetData(String date) throws IOException{
logBookFile = new File("C:\\Users\\Jay Patel\\IdeaProjects\\JavaLearn\\CompetitiveJava\\src\\BudgetTracker\\logBook.txt" + getMonthYearName(date) + ".txt");
if (!logBookFile.exists()){
logBookFile.createNewFile();
}
FileReader read = new FileReader(logBookFile);
BufferedReader rd = new BufferedReader(read);
String budgetData = null;
String line, last = null;
if (rd.readLine() == null){
budgetData = null;
}else {
while ((line = rd.readLine()) != null){
last = line;
}
String[] arr = new String[5];
int i = 0;
StringTokenizer st = new StringTokenizer(last, "\t");
while (st.hasMoreTokens()){
arr[i] = st.nextToken();
i++;
}
budgetData = arr[0].toString().concat(" "+arr[1].toString());
}
rd.close();
return budgetData;
}
}