從文本文件中刪除單詞

Question

我有一種方法可以從文本文件中以單詞列表格式刪除單詞，但是它會不斷刪除文件中的所有數據，而不是特定單詞

 public static void Option2Method() throws IOException 
 {
   File inputFile = new File("wordlist.txt");
   File tempFile = new File("TempWordlist.txt");

   BufferedReader reader = new BufferedReader(new FileReader(inputFile));
   BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));

   String lineToRemove = JOptionPane.showInputDialog(null, "Enter a word to remove");
   String currentLine;

   while((currentLine = reader.readLine()) != null)
 {
   String trimmedLine = currentLine.trim();
   if(trimmedLine.equals(lineToRemove)) continue;
   writer.write(currentLine);
 }
   boolean successful = tempFile.renameTo(inputFile);
 }

Answer 1

代碼必須在編寫器上調用close() 。

確保數據從緩沖區到達實際文件：

 while((currentLine = reader.readLine()) != null)
 {
   String trimmedLine = currentLine.trim();
   if(trimmedLine.equals(lineToRemove)) continue;
   writer.write(currentLine);
 }

 writer.close();
 reader.close();

考慮使用try / catch / finally塊，以確保即使拋出IOException也關閉了流。

Answer 2

嘗試這個：

String str = "Sample Line";
String[] words = str.split(" "); 
for(i=0 to i>arr.length)
{
if(str.indexOf(arr[i])!=-1) //checks if the word is present...
str.replace(arr[i],""); //replace the stop word with a blank
space..
}

或者這樣：

String yourwordline = "dgfhgdfdsgfl Sample dfhdkfl"; 
yourwordline.replaceAll("Sample",""); 

Answer 3

嘗試這個：

public static void removeLineMethod(String lineToRemove) throws IOException {
   File inputFile = new File("wordlist.txt");
   File tempFile = new File("TempWordlist.txt");

   BufferedReader reader = new BufferedReader(new FileReader(inputFile));
   BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));
   String currentLine;

   while((currentLine = reader.readLine()) != null)
 {
   String trimmedLine = currentLine.trim();
   if(trimmedLine.equals(lineToRemove)) continue;
   writer.write(currentLine + "\n");
 }
   reader.close();
   writer.close();
   inputFile.delete();
   tempFile.renameTo(inputFile);
 }

如果不刪除輸入文件，則重命名將失敗，因此請關閉流，刪除輸入文件，然后重命名臨時文件。

Answer 4

File inputFile = new File("wordlist.txt");
       File tempFile = new File("TempWordlist.txt");

   BufferedReader reader = new BufferedReader(new FileReader(inputFile));
   BufferedWriter writer = new BufferedWriter(new FileWriter(tempFile));

   String lineToRemove = JOptionPane.showInputDialog(null, "Enter a word to remove");
   String currentLine;

 while((currentLine = reader.readLine()) != null)
 {
   String trimmedLine = currentLine.trim();
   if(trimmedLine.equals(lineToRemove)) continue;
   writer.write(currentLine);
   writer.newLine();
 }
   reader.close();
   writer.close();
   inputFile.delete();
   tempFile.renameTo(inputFile);
    }