填充DefaultTableModel从测试文件

huangapple
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英文:

Populate DefaultTableModel from test file

问题

以下是翻译好的内容：

我有这个文本文件：

  1. A
  2. B
  3. 3.00
  5. A
  6. B
  7. 3.00

我的视图是：

填充DefaultTableModel从测试文件

我想要将每一行与每一列进行匹配（第一行-第一列，第二行-第二列，依此类推）。我在哪里犯了一个错误？
我的代码如下：

  1.     BufferedReader infile = new BufferedReader(reader);
  2.     String line = "";
  3.     int counter = 0;
  4.     String title = "";
  5.     String author = "";
  6.     String price = "";
  7.     try {
  8.         while ((line = infile.readLine()) != null) {
  9.             ++counter;
  11.             if (counter == 1) {
  12.                 title = line;
  13.             } else if (counter == 2) {
  14.                 author = line;
  15.             } else if (counter == 3) {
  16.                 price = line;
  17.                 SimpleBook sb = new SimpleBook(title, author, price);
  18.                 bookList.add(sb);
  19.                 counter = 0;
  20.             }
  21.         }
  22.     } catch (IOException ex) {
  23.         Logger.getLogger(SimpleBookList.class.getName()).log(Level.SEVERE, null, ex);
  24.     }
  25. }
英文:

I have this text file:

  1. A
  2. B
  3. 3.00
  5. A
  6. B
  7. 3.00

and my view is:

填充DefaultTableModel从测试文件

I want to match each row with each column(first_row-first_column,second_row-second_column, etc..) Where have I made a mistake?
My code is as follows:

  1.     BufferedReader infile = new BufferedReader(reader);
  2.         String line = "";
  3.         int counter = 0;
  4.         String title = "";
  5.         String author = "";
  6.         String price = "";
  7.         try {
  8.             while ((line  = infile.readLine()) != null) {
  9.                 ++counter;
  11.                 if (counter == 1) {
  12.                     title = line;
  13.                 } else if (counter == 2) {
  14.                     author = line;
  15.                 } else if (counter == 3) {
  16.                     price = line;
  17.                     SimpleBook sb = new SimpleBook(title, author, price);
  18.                     bookList.add(sb);
  19.                     counter = 0;
  20.                 }
  21.             }
  22.         } catch (IOException ex) {
  23.             Logger.getLogger(SimpleBookList.class.getName()).log(Level.SEVERE, null, ex);
  24.         }
  25.     }
  27. }

答案1

得分: 2

你可以这样做，因为在你的输入文件中有一个空行。

  1. BufferedReader infile = new BufferedReader(reader);
  2. String line = "";
  3. int counter = 0;
  4. String title = "";
  5. String author = "";
  6. String price = "";
  7. try {
  8.     while ((line = infile.readLine()) != null) {
  9.         if (line.isEmpty())
  10.             continue;
  12.         ++counter;
  14.         if (counter == 1) {
  15.             title = line;
  16.         } else if (counter == 2) {
  17.             author = line;
  18.         } else if (counter == 3) {
  19.             price = line;
  20.             SimpleBook sb = new SimpleBook(title, author, price);
  21.             bookList.add(sb);
  22.             counter = 0;
  23.         }
  24.     }
  25. } catch (IOException ex) {
  26.     Logger.getLogger(SimpleBookList.class.getName()).log(Level.SEVERE, null, ex);
  27. }
英文:

you can do this as there is an blank line in your input file .

  1. BufferedReader infile = new BufferedReader(reader);
  2.     String line = "";
  3.     int counter = 0;
  4.     String title = "";
  5.     String author = "";
  6.     String price = "";
  7.     try {
  8.         while ((line  = infile.readLine()) != null) {
  9.             if(line.isEmpty())
  10.                   continue;
  11.             
  12.             ++counter;
  14.             if (counter == 1) {
  15.                 title = line;
  16.             } else if (counter == 2) {
  17.                 author = line;
  18.             } else if (counter == 3) {
  19.                 price = line;
  20.                 SimpleBook sb = new SimpleBook(title, author, price);
  21.                 bookList.add(sb);
  22.                 counter = 0;
  23.             }
  24.         }
  25.     } catch (IOException ex) {
  26.         Logger.getLogger(SimpleBookList.class.getName()).log(Level.SEVERE, null, ex);
  27.     }

答案2

得分: 0

你的计数器在循环开始时递增，因此在 if 语句中的值永远不会是 0，而是 1。然后，空行被解析为 1 并进入 A 列。你可以通过多种方式解决，比如跳过空行或在行不为空时递增计数器。

英文:

Your counter is incrementing at the begining of loop, so you never have 0 but 1 on if statement. Then empty line is parsed as 1 and goes to A column. You can solve it in multpile ways like skip empty lines or increment counter if line is not empty.

huangapple
  • 本文由 发表于 2020年5月30日 20:38:15
  • 转载请务必保留本文链接：https://go.coder-hub.com/62102548.html
  • java
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