我正在制作一个简单的基于文本的游戏，您必须在其中键入命令来执行某些操作。我最近在游戏中添加了一项功能，可让您保存进度。但是由于某种原因，如果您尝试将游戏保存在现有的保存文件上，它会崩溃。这是保存游戏的代码（当它保存失败时，它会说“尝试保存游戏数据时出错。游戏现在将关闭。”如预期的那样）：
import java.util.Formatter;
import javax.swing.JOptionPane;
public class Gamesave {
private static Formatter gamesave;
private static Formatter firstTimeSave;
private static Formatter attackpoints;
private static Formatter defensepoints;
private static Formatter skillpoints;
private static Formatter wins;
private static Formatter loses;
private static Formatter money;
// Attackpoints, defensepoints, skillpoints, wins, loses, money
public static void openFile(){
try{
attackpoints = new Formatter("c:\\FightNight\\Saves\\"+MainClass.newProfileName+"\\"+MainClass.newProfileName+"_attackpoints.txt");
defensepoints = new Formatter("c:\\FightNight\\Saves\\"+MainClass.newProfileName+"\\"+MainClass.newProfileName+"_defensepoints.txt");
skillpoints = new Formatter("c:\\FightNight\\Saves\\"+MainClass.newProfileName+"\\"+MainClass.newProfileName+"_skillpoints.txt");
wins = new Formatter("c:\\FightNight\\Saves\\"+MainClass.newProfileName+"\\"+MainClass.newProfileName+"_wins.txt");
loses = new Formatter("c:\\FightNight\\Saves\\"+MainClass.newProfileName+"\\"+MainClass.newProfileName+"_loses.txt");
money = new Formatter("c:\\FightNight\\Saves\\"+MainClass.newProfileName+"\\"+MainClass.newProfileName+"_money.txt");
gamesave = new Formatter("c:\\FightNight\\Saves\\"+MainClass.newProfileName+"\\"+MainClass.newProfileName+".txt");
firstTimeSave = new Formatter("c:\\FightNight\\Game Data\\firstTimeSave.txt");
}catch (Exception e) {JOptionPane.showMessageDialog(null, "There was an error when trying to save game data. The game will now close."); System.exit(0);}
}
public static void addRecords(){
attackpoints.format("%s",MainClass.attackpoints);
defensepoints.format("%s",MainClass.defensepoints);
skillpoints.format("%s",MainClass.skillpoints);
wins.format("%s",MainClass.wins);
loses.format("%s",MainClass.loses);
money.format("%s",MainClass.money);
firstTimeSave.format("%b", MainClass.firstTime);
}
public void closeFile(){
attackpoints.close();
defensepoints.close();
skillpoints.close();
wins.close();
loses.close();
money.close();
gamesave.close();
firstTimeSave.close();
}
}
这是调用类的代码：
static class SaveAction implements ActionListener{
public void actionPerformed (ActionEvent e){
try{
Gamesave.openFile();
Gamesave.addRecords();
save.closeFile();
JOptionPane.showMessageDialog(null, "Your game has been saved.");
}catch (Exception e1) {JOptionPane.showMessageDialog(null, "Sorry, that is an invalid response.");}
}
}
另请注意，当游戏首次在计算机上启动时，它会为保存文件和其他所需内容创建目录。感谢您的任何帮助！
堆栈跟踪：
java.io.FileNotFoundException: c:\FightNight\Saves\null\null_attackpoints.txt (The system cannot find the path specified)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(Unknown Source)
at java.io.FileOutputStream.<init>(Unknown Source)
at java.util.Formatter.<init>(Unknown Source)
at Gamesave.openFile(Gamesave.java:16)
at CommandLine$SaveAction.actionPerformed(CommandLine.java:93)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)