怪异的线程“主” java.io.FileNotFoundException I / O Java [英] Weird exception in thread "main" java.io.FileNotFoundException I/O Java

问题描述

 线程main中的异常java.io. FileNotFoundException：\src\product.txt（没有这样的文件或目录）
在java.io.FileInputStream.open（Native方法）$ b $在java.io.FileInputStream。< init>（FileInputStream .java：120）
 at dao.Inventory.readFile（Inventory.java:30）
 at view.InventoryView.init（InventoryView.java:33）
 at view.InventoryView。< （InventoryView.java:21）
 at view.InventoryView.main（InventoryView.java:211）
  

但是，我的src文件夹中有product.txt文件。

我的代码如下：

  public void readFile（）throws IOException {
 //输入文件必须在第一个参数中提供
 InputStream istream; 
 File inputFile = new File（\\src\\product.txt）; 
 istream = new FileInputStream（inputFile）; 
 
 BufferedReader lineReader; 
 lineReader = new BufferedReader（new InputStreamReader（istream））; 
字符串行; （（line = lineReader.readLine（））！= null）{
 
 StringTokenizer tokens = new StringTokenizer（line，\ t）; 
 
 
 
 // String tmp = tokens.nextToken（）; 
 // System.out.println（token+ tmp）; 
 ActionProduct p = new ActionProduct（）; 
 prodlist.add（p）; 
 String category = p.getCategory（）; 
 category = tokens.nextToken（）; 
 System.out.println（got category+ category）; 
 
 int item = p.getItem（）; 
 item = Integer.parseInt（tokens.nextToken（））; 
 
 String name = p.getName（）; 
 System.out.println（got name+ name）; 
 
 double price = p.getPrice（）; 
 price = Double.parseDouble（tokens.nextToken（））; 
 
 int units = p.getUnits（）; 
 units = Integer.parseInt（tokens.nextToken（））; 
 
 
 $ / code $ / pre 
 
我认为我的代码没有任何问题。另外，我看到一个类似FILE.TXT.TXT的隐藏扩展的帖子，你将如何在MacOSX中显示一个隐藏的扩展？有什么建议么？ （除了隐藏的扩展问题之外，还会有其他问题吗？）
 
解决方案
  / src / product。 txt 是一个绝对路径，所以程序会尝试在根路径（/）的src文件夹中找到该文件。使用 src / product.txt ，程序将使用它作为相对路径。
 
I have this error when I am trying to read the file:
Exception in thread "main" java.io.FileNotFoundException: \src\product.txt (No such file or directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:120)
at dao.Inventory.readFile(Inventory.java:30)
at view.InventoryView.init(InventoryView.java:33)
at view.InventoryView.<init>(InventoryView.java:21)
at view.InventoryView.main(InventoryView.java:211)
But the thing is, I have the product.txt in my src folder.

My code is the following:
  public void readFile() throws IOException {
            // input file must be supplied in the first argument
            InputStream istream;
                    File inputFile = new File("\\src\\product.txt");
                    istream = new FileInputStream(inputFile);

                    BufferedReader lineReader;
                lineReader = new BufferedReader(new InputStreamReader(istream));
                    String line;

                        while ((line = lineReader.readLine()) != null) {

                StringTokenizer tokens = new StringTokenizer(line, "\t");

                // String tmp = tokens.nextToken();
                // System.out.println("token " + tmp);
                ActionProduct p = new ActionProduct();
                prodlist.add(p);
                String category = p.getCategory();
                category = tokens.nextToken();
                System.out.println("got category " +category);

                int item = p.getItem();
                item = Integer.parseInt(tokens.nextToken());

                String name = p.getName();
                System.out.println("got name " +name);

                double price = p.getPrice();
                price = Double.parseDouble(tokens.nextToken());

                int units = p.getUnits();
                units = Integer.parseInt(tokens.nextToken());
            }
        }
I don't think anything is wrong with my code. Also, I saw a similar post about a hidden extension like FILE.TXT.TXT, how would you show a hidden extension in MacOSX?? Any suggestions? (Would there be any other problem besides the hidden extension issue?)
解决方案
/src/product.txt is an absolute path, so the program will try to find the file in the src folder of your root path (/). Use src/product.txt so the program will use this as a relative path.

                        
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