使FileReader循环读取每四行

Question

我的问题是 ，在寻找客户时，我必须安排while循环以仅检查每四行读取的内容。

这是我已经解决此问题的代码：

BufferedReader br = new BufferedReader(new FileReader("Customers.txt"));
String line;

while ((line = br.readLine()) != null)
{
    ...
}

br.close();

有人知道“ ...”这个地方需要什么吗？

谢谢！

Answer 1

遵循以下原则

int i = 0;
while ((line = br.readLine()) != null)
{
   i++;
   if (i % 4 == 0)
   {
      // if i is divisible by 4, then
      // your actual code will get executed
      ...
   }

}

Answer 2

只需在循环结束时调用br.readLine（）3次，并丢弃输出：

BufferedReader br = new BufferedReader(new FileReader("Customers.txt"));
String line;

while ((line = br.readLine()) != null)
{
    ...
    for(int i=0;i<3;i++){ br.readLine(); }
}

br.close();

Answer 3

BufferedReader br = new BufferedReader(new FileReader("Customers.txt"));
String line;
int count 0;
while ((line = br.readLine()) != null)
{
    if (count!=3)
        count++;
    else {
        // Do something?
        count=0;
    }

}

br.close();