PrintWriter不会写入.txt文件

Question

我曾尝试查看有关该主题的旧主题，但似乎没有一种解决方案适合我。 我试图写一个名为“ receipt.txt”的.txt文件，但是使用以下代码，我什么也没得到。 没有创建文件（显然文件中不存在任何内容）没有错误，只是没有错误。

//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

您的输出将写入名为fileName的文件

更换

PrintWriter writer = new PrintWriter("fileName");

与

PrintWriter writer = new PrintWriter(fileName);

编辑：

显然，您不是在错误的位置查找文件，请添加以下语句以查看在何处创建了文件：

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

另请注意， close ， flush的顺序不正确。 flush应首先调用。

Answer 2

PrintWriter writer = new PrintWriter("fileName");

应该

PrintWriter writer = new PrintWriter(fileName);

如您所定义

String fileName = "receipt.txt";