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：
A
B
3.00
A
B
3.00
我的视图是：
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：
BufferedReader infile = new BufferedReader(reader);
String line = "";
int counter = 0;
String title = "";
String author = "";
String price = "";
try {
while ((line = infile.readLine()) != null) {
++counter;
if (counter == 1) {
title = line;
} else if (counter == 2) {
author = line;
} else if (counter == 3) {
price = line;
SimpleBook sb = new SimpleBook(title, author, price);
bookList.add(sb);
counter = 0;
}
}
} catch (IOException ex) {
Logger.getLogger(SimpleBookList.class.getName()).log(Level.SEVERE, null, ex);
}
}
英文:
I have this text file:
A
B
3.00
A
B
3.00
and my view is:
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:
BufferedReader infile = new BufferedReader(reader);
String line = "";
int counter = 0;
String title = "";
String author = "";
String price = "";
try {
while ((line = infile.readLine()) != null) {
++counter;
if (counter == 1) {
title = line;
} else if (counter == 2) {
author = line;
} else if (counter == 3) {
price = line;
SimpleBook sb = new SimpleBook(title, author, price);
bookList.add(sb);
counter = 0;
}
}
} catch (IOException ex) {
Logger.getLogger(SimpleBookList.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
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。
BufferedReader infile = new BufferedReader(reader);
String line = "";
int counter = 0;
String title = "";
String author = "";
String price = "";
try {
while ((line = infile.readLine()) != null) {
if (line.isEmpty())
continue;
++counter;
if (counter == 1) {
title = line;
} else if (counter == 2) {
author = line;
} else if (counter == 3) {
price = line;
SimpleBook sb = new SimpleBook(title, author, price);
bookList.add(sb);
counter = 0;
}
}
} catch (IOException ex) {
Logger.getLogger(SimpleBookList.class.getName()).log(Level.SEVERE, null, ex);
}
英文:
you can do this as there is an blank line in your input file .
BufferedReader infile = new BufferedReader(reader);
String line = "";
int counter = 0;
String title = "";
String author = "";
String price = "";
try {
while ((line = infile.readLine()) != null) {
if(line.isEmpty())
continue;
++counter;
if (counter == 1) {
title = line;
} else if (counter == 2) {
author = line;
} else if (counter == 3) {
price = line;
SimpleBook sb = new SimpleBook(title, author, price);
bookList.add(sb);
counter = 0;
}
}
} catch (IOException ex) {
Logger.getLogger(SimpleBookList.class.getName()).log(Level.SEVERE, null, ex);
}
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.
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