與\ n

Question

更換廣場我有一個方法，從一個JTextArea獲取文本並保存在一個txt文件。 這一切工作正常，但文本保存在空空的小方塊代替\ n直線。 我想用\ n來替代這些廣場

我的代碼是：

public void createTxt(){ 

TxtFilter txt = new TxtFilter(); 

JFileChooser fSave = new JFileChooser(); 

fSave.setFileFilter(txt); 
int result = fSave.showSaveDialog(this); 
if(result == JFileChooser.APPROVE_OPTION){ 
    File sFile = new File(fSave.getSelectedFile()+ ".txt"); 

    String file_name = sFile.getName(); 
    String file_path = sFile.getParent(); 

    try{ 
     if(!sFile.exists()){ 

      BufferedWriter out = new BufferedWriter(new FileWriter(sFile)); 

      FileReader fr = new FileReader(jTextArea1.getText()); 
      BufferedReader br = new BufferedReader(fr); 

      String line = ""; 

      while((line = br.readLine())!= null){ 
      line = line.replace("o", "\n"); 
      out.write(line); 
      } 
      out.close(); 

      JOptionPane.showMessageDialog(null, "Warning file • " + file_name + " • created succesfully in \n" + file_path);  
     } 

     else{ 

一定有什麼錯誤的，因爲它創建的txt文件，但它始終是empy，沒有文字是由JTextArea中得到和我總是有例外，因爲從

catch(IOException e){ 
     System.out.println("Error"); 
    } 

錯誤在哪裏？如何修改代碼？

PS我已經「O」寫的，而不是空方，因爲我不知道該寫什麼，以替換第一個字符串（或字符）。

由於

加了：的printStackTrace

java.io.FileNotFoundException: sdfdsf (Impossibile trovare il file specificato) 
at java.io.FileInputStream.open(Native Method) 
at java.io.FileInputStream.<init>(FileInputStream.java:106) 
at java.io.FileInputStream.<init>(FileInputStream.java:66) 
at java.io.FileReader.<init>(FileReader.java:41) 
at provegrafica.ProvaFramePop.createTxt(ProvaFramePop.java:154) 
at provegrafica.ProvaFramePop.jMenuSaveActionPerformed(ProvaFramePop.java:129) 
at provegrafica.ProvaFramePop.access$100(ProvaFramePop.java:17) 
at provegrafica.ProvaFramePop$2.actionPerformed(ProvaFramePop.java:64) 
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995) 
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318) 
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387) 
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242) 
at javax.swing.AbstractButton.doClick(AbstractButton.java:357) 
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:809) 
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:850) 
at java.awt.Component.processMouseEvent(Component.java:6289) 
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267) 
at java.awt.Component.processEvent(Component.java:6054) 
at java.awt.Container.processEvent(Container.java:2041) 
at java.awt.Component.dispatchEventImpl(Component.java:4652) 
at java.awt.Container.dispatchEventImpl(Container.java:2099) 
at java.awt.Component.dispatchEvent(Component.java:4482) 
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577) 
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238) 
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168) 
at java.awt.Container.dispatchEventImpl(Container.java:2085) 
at java.awt.Window.dispatchEventImpl(Window.java:2478) 
at java.awt.Component.dispatchEvent(Component.java:4482) 
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:644) 
at java.awt.EventQueue.access$000(EventQueue.java:85) 
at java.awt.EventQueue$1.run(EventQueue.java:603) 
at java.awt.EventQueue$1.run(EventQueue.java:601) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87) 
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98) 
at java.awt.EventQueue$2.run(EventQueue.java:617) 
at java.awt.EventQueue$2.run(EventQueue.java:615) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87) 
at java.awt.EventQueue.dispatchEvent(EventQueue.java:614) 
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) 
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) 
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) 
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) 
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) 
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) 

生成成功（總時間：19秒），

加了：代碼

else{ 
      String message = "File • " + file_name + " • already exist in \n" + file_path + ":\n" + "Do you want to overwrite?"; 
      String title = "Warning"; 
      int reply = JOptionPane.showConfirmDialog(null, message, title, JOptionPane.YES_NO_OPTION); 
      if(reply == JOptionPane.YES_OPTION){ 
       sFile.delete(); 

       BufferedWriter out = new BufferedWriter(new FileWriter(sFile)); 
       out.write(jTextArea1.getText()); 
       out.close(); 
       JOptionPane.showMessageDialog(null, "File • " + file_name + " • overwritten succesfully in \n" + file_path); 

      } 
     } 

Answer 1

那些是的否則部分\ n的。您正在記事本中打開。

你要麼需要打印出每個之前\ n一個\ R（其在這裏可以通過使用緩衝作家，其具有打印線方法簡單地完成），或例如在打開寫字板。

Answer 2

更換

line = line.replace("o", "\n"); 

與

line = line.replaceAll("o", System.getProperty("line.separator")); 

Answer 3

不要推倒重來。

所有文本組件支持write(...)方法。將文本寫入文件時，此方法將使用正確的換行符字符串。所以，你要做的就是：

textArea.write(...); 

Answer 4

你在其他部分做 你的程序是無法找到指定的文件。

你在說如果

if(!sFile.exists()){ // don't use not here 
// code to write into the file 
} 

），而不是系統的條件在那裏，因爲它應該是

if(sFile.exists()){ 
// code to write into the file 
} 

使用以下寫入文件

while((line = br.readLine())!= null){ 
     out.append(line); //can also use write in place of append 
     out.append("\r\n"); 
     } 
     out.close();