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我正在製作一個簡單的基於文本的遊戲，您必須鍵入命令才能執行某些操作。我最近在遊戲中添加了一個功能，可以讓您保存進度。但由於某種原因，如果您嘗試將遊戲保存在現有的保存文件上，則會崩潰。這裏是保存遊戲的代碼（當它無法保存它說：「有我在嘗試保存遊戲數據遊戲現在將關閉一個錯誤。」像預期）：Java程序覆蓋現有的.txt文件時會崩潰嗎？
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();
}
}
這裏調用類的代碼：
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.");}
}
}
另需注意，當遊戲啓動的第一次在計算機上它創建的目錄中保存其他所需的文件和任何東西。 謝謝你的幫助！
堆棧跟蹤：
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)
請複製從命令行啓動的堆棧跟蹤。 – Phani