信息：
所以我做了一个简单的类来保存某个俄罗斯方块游戏的高分。
当我的整个游戏都以.JAR 形式保存时，我需要该文件可以访问，因此我需要将文件位置设置为外部。
所以现在我使用“c：//”位置，因为我确定所有计算机都有。但我不确定所有计算机都有 LineHighscores.txt 和 TimeHighscores.txt 文件，因此需要创建它们。
问题：
每当我运行我的代码时，我都会收到一个错误：
c:/TimeHighscores.txt
c:/TimeHighscores.txt
dec 19, 2012 2:26:35 AM tetris.FileIO loadHighscores
SEVERE: null
java.io.IOException: Toegang geweigerd
at java.io.WinNTFileSystem.createFileExclusively(Native Method)
at java.io.File.createNewFile(File.java:947)
at tetris.FileIO.loadHighscores(FileIO.java:75)
at tetris.FileIO.getTimeScores(FileIO.java:37)
at tetris.HighScores.<init>(HighScores.java:41)
at tetris.Menu$2.actionPerformed(Menu.java:75)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased
(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6505)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:723)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:682)
at java.awt.EventQueue$3.run(EventQueue.java:680)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege
(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege
(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:696)
at java.awt.EventQueue$4.run(EventQueue.java:694)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege
(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:693)
at java.awt.EventDispatchThread.pumpOneEventForFilters
(EventDispatchThread.java:244)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEventsForHierarchy
(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)
java.io.FileNotFoundException: c:\TimeHighscores.txt
(Het systeem kan het opgegeven bestand niet vinden)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at tetris.FileIO.loadHighscores(FileIO.java:84)
at tetris.FileIO.getTimeScores(FileIO.java:37)
at tetris.HighScores.<init>(HighScores.java:41)
at tetris.Menu$2.actionPerformed(Menu.java:75)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased
(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6505)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:723)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:682)
at java.awt.EventQueue$3.run(EventQueue.java:680)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege
(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege
(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:696)
at java.awt.EventQueue$4.run(EventQueue.java:694)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege
(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:693)
at java.awt.EventDispatchThread.pumpOneEventForFilters
(EventDispatchThread.java:244)
at java.awt.EventDispatchThread.pumpEventsForFilter
(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEventsForHierarchy
(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)
代码：
public class FileIO {
private File file;
private Scanner filescScanner, lineScanner;
private PrintWriter fileWriter;
private String[][] data;
static final String lineHighscoreTXT = "c://LineHighscores.txt", timeHighscoreTXT = "c://TimeHighscores.txt";
public FileIO () {
data = new String[100][2];
}
public String[][] getLineScores(){
System.out.println(lineHighscoreTXT);
return this.loadHighscores(lineHighscoreTXT);
}
public String[][] getTimeScores(){
System.out.println(timeHighscoreTXT);
return this.loadHighscores(timeHighscoreTXT);
}
public void setLineScores( String name,String lines ){
boolean found= false;
data = this.getLineScores();
for(int i = 0; i<data.length && !found ; i++){
if(data[i][0] == null || "Niemand".equals(data[i][0])){
data[i][0]=name;
data[i][1]=lines;
found=true;
}
}
this.saveHighscores(lineHighscoreTXT,data);
}
public void setTimeScores(String time, String name){
boolean found= false;
data = this.getLineScores();
for(int i = 0; i<data.length && !found ; i++){
if(data[i][0] == null || "Niemand".equals(data[i][0])){
data[i][0]=name;
data[i][1]=time;
found=true;
}
}
this.saveHighscores(timeHighscoreTXT,data);
}
private String[][] loadHighscores( String fileLocation){
int x=0;
String test = "";
System.out.println(fileLocation.toString());
File file = new File(fileLocation);
if (!file.exists()){
try {
file.createNewFile();
} catch (IOException ex) {
Logger.getLogger(FileIO.class.getName()).log(Level.SEVERE, null, ex);
}
}
try{
filescScanner = new Scanner(file);}
catch(Exception ioe){System.err.println(ioe);}
if (filescScanner.hasNext()){
while(filescScanner.hasNextLine()&& x<100) {
lineScanner = new Scanner(filescScanner.nextLine());
lineScanner.useDelimiter("-/-");
data[x][0]=lineScanner.next();//name
data[x][1]=lineScanner.next();//data
x++;
}
lineScanner.close();
filescScanner.close();
}
else{
data[0][0] = "Niemand";
data[0][1] = "0";
}
return data;
}
private void saveHighscores( String fileLocation, String[][] data){
int x=0;
file = new File(fileLocation);
if (!file.exists()){try {
file.createNewFile();
} catch (IOException ex) {
Logger.getLogger(FileIO.class.getName()).log(Level.SEVERE, null, ex);
}
}
try {
fileWriter = new PrintWriter(file);
} catch (FileNotFoundException ex) {
Logger.getLogger(FileIO.class.getName()).log(Level.SEVERE, null, ex);
}
if(data.length>x){
while(data.length>x && data[x][0] != null ){
fileWriter.println(data[x][0]+"-/-"+data[x][1]);
x++;
}
fileWriter.close();
}
}
public static void main(String[] args){
FileIO file = new FileIO();
file.setLineScores("55555555", "KoenKevin");
}
}