使用Java读取文本文件

Question

我正在编写“移至最前”编码器，该编码器读取给定的文件，然后将文件解析为列表。 它可以很好地与编码配合使用，但是仅适用于只有一行的文件，我认为问题出在while循环中。

这是代码：

while ((line = br.readLine()) !=
       null) // While the line file is not empty after reading a line from teh text file split the line into strings
{
  splitArray = line.split(" ");
}

for (int i = 0; i <= splitArray.length - 1;
     i++) // for every string in the array test if it exists already then output data accordinly
{
  if (FirstPass.contains(splitArray[i])) {
    System.out.println(FirstPass.lastIndexOf(splitArray[i]));
    FirstPass.addFirst(splitArray[i]);
    FirstPass.removeLastOccurrence(splitArray[i]);
  } else if (!FirstPass.contains(splitArray[i])) {
    FirstPass.addFirst(splitArray[i]);
    System.out.println("0 " + splitArray[i]);
  }
}

System.out.println(" ");
for (String S : FirstPass) {
  System.out.println(S);
}

Answer 1

您解析splitArray的代码在while循环之外..因此，仅最后一行会得到处理。

要处理每一行，请将整个for ()块放入while循环内。

while((line = br.readLine()) != null) // While the line file is not empty after reading a line from teh text file split the line into strings
{
    splitArray = line.split(" ");


    for(int i = 0; i <= splitArray.length - 1; i++)     // for every string in the array test if it exists already then output data accordinly
    {
        //..........
    } // end for
} // end while 

Answer 2

大括号放在错误的位置：

while((line = br.readLine()) != null) 
{
    splitArray = line.split(" ");
}  // This } shouuldn't be here...