java输入读取器无法识别文件的特定值

这是我的代码，用于读取一行并理解输入，即制表符字符之前的所有内容，以及标签，即制表符之后的所有内容：

    // READ INPUT
    BufferedReader reader = new BufferedReader(new FileReader("../PA-A-train.dat"));

    while (reader.readLine() != null) 
    {
        String[] label_detector = reader.readLine().split("\t");
        String trueLabel = label_detector[label_detector.length - 1];



        String inputs = label_detector[label_detector.length - 2];
        System.out.println("these are inputs: " + inputs);


        System.out.println("this is the corresponding label: " + trueLabel);
    }
    reader.close();

这是我的档案：

 0 0 0 0 0 A    0 0
 0 0 0 0 1 B    0 0
 0 0 0 1 0 C    0 0
 0 0 0 1 1  0 0
 0 0 1 0 0  0 0
 0 0 1 0 1  0 0
 0 0 1 1 0  0 0
 0 0 1 1 1  1 0
 0 1 0 0 0  0 0
 0 1 0 0 1  0 1
 0 1 0 1 0  0 0
 0 1 0 1 1  1 1
 0 1 1 0 0  0 0
 0 1 1 0 1  1 1
 0 1 1 1 0  1 0
 0 1 1 1 1  1 1
 1 0 0 0 0  0 0
 1 0 0 0 1  0 0
 1 0 0 1 0  0 0
 1 0 0 1 1  1 0
 1 0 1 0 0  0 0
 1 0 1 0 1  1 0
 1 0 1 1 0  1 0
 1 0 1 1 1  1 0
 1 1 0 0 0  0 0
 1 1 0 0 1  1 1
 1 1 0 1 0  1 0
 1 1 0 1 1  1 1
 1 1 1 0 0  1 0
 1 1 1 0 1  1 1
 1 1 1 1 0  1 0
 1 1 1 1 1  1 1

但我的输出如下所示：

these are inputs:  0 0 0 0 1 B 
this is the corresponding label: 0 0
these are inputs:  0 0 0 1 1 
this is the corresponding label: 0 0
these are inputs:  0 0 1 0 1 
this is the corresponding label: 0 0
these are inputs:  0 0 1 1 1 
this is the corresponding label: 1 0
these are inputs:  0 1 0 0 1 
this is the corresponding label: 0 1
these are inputs:  0 1 0 1 1 
this is the corresponding label: 1 1
these are inputs:  0 1 1 0 1 
this is the corresponding label: 1 1
these are inputs:  0 1 1 1 1 
this is the corresponding label: 1 1
these are inputs:  1 0 0 0 1 
this is the corresponding label: 0 0
these are inputs:  1 0 0 1 1 
this is the corresponding label: 1 0
these are inputs:  1 0 1 0 1 
this is the corresponding label: 1 0
these are inputs:  1 0 1 1 1 
this is the corresponding label: 1 0
these are inputs:  1 1 0 0 1 
this is the corresponding label: 1 1
these are inputs:  1 1 0 1 1 
this is the corresponding label: 1 1
these are inputs:  1 1 1 0 1 
this is the corresponding label: 1 1
these are inputs:  1 1 1 1 1 
this is the corresponding label: 1 1

如您所见，第一行完全被忽略，它也忽略了第三行。为什么呢

**建议的解决方案如下所示：*

        String line;
    while ((line = reader.readLine()) != null) 
    {
        String[] label_detector = line.split("\t");

        String trueLabel = label_detector[label_detector.length - 1];


        String inputs = label_detector[label_detector.length - 2];
        System.out.println("these are inputs: " + inputs);


        System.out.println("this is the corresponding label: " + trueLabel);
    }
    reader.close();

---

每次迭代调用

readLine（）

两次。偶尔

while (reader.readLine() != null) 

一旦

String[] label_detector = reader.readLine().split("\t");

将代码更改为

String line;
while ((line = reader.readLine()) != null) {
    String[] label_detector = line.split("\t");

---

不仅是这两行，还有大约一半的行丢失了。问题出在

reader.readLine（）

上。你读了两行，但只处理了一行

你可以这样修理它

// READ INPUT
BufferedReader reader = new BufferedReader(new FileReader("../PA-A-train.dat"));

String line;//new variable

while ((line=reader.readLine()) != null) //read the line and compare
{
    String[] label_detector = line.split("\t");//split
    String trueLabel = label_detector[label_detector.length - 1];



    String inputs = label_detector[label_detector.length - 2];
    System.out.println("these are inputs: " + inputs);


    System.out.println("this is the corresponding label: " + trueLabel);
}
reader.close();