Java textfile I/O problem
- by KáGé
Hello,
I have to make a torpedo game for school with a toplist for it. I want to store it in a folder structure near the JAR: /Torpedo/local/toplist/top_i.dat, where the i is the place of that score. The files will be created at the first start of the program with this call:
File f;
f = new File(Toplist.toplistPath+"/top_1.dat");
if(!f.exists()){
Toplist.makeToplist();
}
Here is the toplist class:
package main;
import java.awt.Color;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.prefs.Preferences;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JTextArea;
public class Toplist {
static String toplistPath = "./Torpedo/local/toplist"; //I know it won't work this easily, it's only to get you the idea
public static JFrame toplistWindow = new JFrame("Torpedó - [TOPLISTA]");
public static JTextArea toplist = new JTextArea("");
static StringBuffer toplistData = new StringBuffer(3000);
public Toplist() {
toplistWindow.setSize(500, 400);
toplistWindow.setLocationRelativeTo(null);
toplistWindow.setResizable(false);
getToplist();
toplist.setSize(400, 400);
toplist.setLocation(0, 100);
toplist.setColumns(5);
toplist.setText(toplistData.toString());
toplist.setEditable(false);
toplist.setBackground(Color.WHITE);
toplistWindow.setLayout(null);
toplistWindow.setVisible(true);
}
public Toplist(Player winner) {
//this is to be done yet, this will set the toplist at first and then display it
toplistWindow.setLayout(null);
toplistWindow.setVisible(true);
}
/**
* Creates a new toplist
*/
public static void makeToplist(){
new File(toplistPath).mkdir();
for(int i = 1; i <= 10; i++){
File f = new File(toplistPath+"/top_"+i+".dat");
try {
f.createNewFile();
} catch (IOException e) {
JOptionPane.showMessageDialog(new JFrame(), "Fájl hiba: toplista létrehozása", "Error", JOptionPane.ERROR_MESSAGE);
}
}
}
/**
* If the score is a top score it inserts it into the list
*
* @param score - the score to be checked
*/
public static void setToplist(int score, Player winner){
BufferedReader input = null;
PrintWriter output = null;
int topscore;
for(int i = 1; i <= 10; i++){
try {
input = new BufferedReader(new FileReader(toplistPath+"/top_"+i+",dat"));
String s;
topscore = Integer.parseInt(input.readLine());
if(score > topscore){
for(int j = 9; j >= i; j--){
input = new BufferedReader(new FileReader(toplistPath+"/top_"+j+".dat"));
output = new PrintWriter(new FileWriter(toplistPath+"/top_"+(j+1)+".dat"));
while ((s = input.readLine()) != null) {
output.println(s);
}
}
output = new PrintWriter(new FileWriter(toplistPath+"/top_"+i+".dat"));
output.println(score);
output.println(winner.name);
if(winner.isLocal){
output.println(Torpedo.session.remote.name);
}else{
output.println(Torpedo.session.remote.name);
}
output.println(Torpedo.session.mapName);
output.println(DateUtils.now());
break;
}
} catch (FileNotFoundException e) {
JOptionPane.showMessageDialog(new JFrame(), "Fájl hiba: toplista frissítése", "Error", JOptionPane.ERROR_MESSAGE);
} catch (IOException e) {
JOptionPane.showMessageDialog(new JFrame(), "Fájl hiba: toplista frissítése", "Error", JOptionPane.ERROR_MESSAGE);
} finally {
if (input != null) {
try {
input.close();
} catch (IOException e) {
JOptionPane.showMessageDialog(new JFrame(), "Fájl hiba: toplista frissítése", "Error", JOptionPane.ERROR_MESSAGE);
}
}
if (output != null) {
output.close();
}
}
}
}
/**
* This loads the toplist into the buffer
*/
public static void getToplist(){
BufferedReader input = null;
toplistData = null;
String s;
for(int i = 1; i <= 10; i++){
try {
input = new BufferedReader(new FileReader(toplistPath+"/top_"+i+".dat"));
while((s = input.readLine()) != null){
toplistData.append(s);
toplistData.append('\t');
}
toplistData.append('\n');
} catch (FileNotFoundException e) {
JOptionPane.showMessageDialog(new JFrame(), "Fájl hiba: toplista betöltése", "Error", JOptionPane.ERROR_MESSAGE);
} catch (IOException e) {
JOptionPane.showMessageDialog(new JFrame(), "Fájl hiba: toplista betöltése", "Error", JOptionPane.ERROR_MESSAGE);
}
}
}
/**
*
* @author http://www.rgagnon.com/javadetails/java-0106.html
*
*/
public static class DateUtils {
public static final String DATE_FORMAT_NOW = "yyyy-MM-dd HH:mm:ss";
public static String now() {
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT_NOW);
return sdf.format(cal.getTime());
}
}
}
The problem is, that it can't access any of the files. I've tried adding them to the classpath and at least six different variations of file/path handling I found online but nothing worked.
Could anyone tell me what do I do wrong?
Thank you.
