PrintWriter不會寫入.txt文件

Question

我曾嘗試查看有關該主題的舊主題，但似乎沒有一種解決方案適合我。 我試圖寫一個名為“ receipt.txt”的.txt文件，但是使用以下代碼，我什么也沒得到。 沒有創建文件（顯然文件中不存在任何內容）沒有錯誤，只是沒有錯誤。

//Write to File
 String fileName = "receipt.txt";
 try{
     PrintWriter writer = new PrintWriter(fileName);
     writer.println("Thank you for shopping with us");
     writer.println("Name: " + customerName);
     writer.println("Returning Customer: " + previousCustomer );
     writer.println("Phone: " + phoneNumber);
     writer.println("Shirt Type: " + shirtType);
     writer.println("Shirt Color: " + shirtColor);
     writer.println("Shirt Material: " + shirtMaterial);
     writer.println("Item Amount: " + itmAmt);
     writer.println("Total Cost: " + fmt3.format(totalCostMsg));
     writer.close();
     writer.flush();
     System.out.println("Receipt printed");      
 } catch (FileNotFoundException e) {
     e.printStackTrace();
 }

Answer 1

您的輸出將寫入名為fileName的文件

更換

PrintWriter writer = new PrintWriter("fileName");

與

PrintWriter writer = new PrintWriter(fileName);

編輯：

顯然，您不是在錯誤的位置查找文件，請添加以下語句以查看在何處創建了文件：

System.out.println(new File(fileName).getAbsolutePath());

另請注意， close ， flush的順序不正確。 flush應首先調用。

Answer 2

PrintWriter writer = new PrintWriter("fileName");

應該

PrintWriter writer = new PrintWriter(fileName);

如您所定義

String fileName = "receipt.txt";