Question

我正在关注教程here并且我一直在努力让这项工作工作两天。编译FileData时收到此错误消息。

FileData.java:13: error: cannot find symbol
          ReadFile file = new ReadFile(file_name);
          ^
   symbol:   class ReadFile
   location: class FileData

FileData.java:13: error: cannot find symbol
          ReadFile file = new ReadFile(file_name);
                              ^
   symbol:   class ReadFile
   location: class FileData

非常感谢任何协助。

代码如下：

package textfiles;
import java.io.IOException;


public class FileData
{
    public static void main(String[] args) throws IOException
    {
        String file_name = "C:/test.txt";

        try
        {
            ReadFile file = new ReadFile(file_name);
            String[] aryLines = file.OpenFile();

            int i;
            for (i=0; i < aryLines.length; i++)
            {
                System.out.println(aryLines[i]);
            }
        }

        catch (IOException e)
        {
            System.out.println( e.getMessage() );

        }

    }
}


package textfiles;

import java.io.IOException;
import java.io.FileReader;
import java.io.BufferedReader;

public class ReadFile
{

    private String path;

    public ReadFile (String file_path) //ReadFile Method
    {
        path = file_path;
    }

    public String[] OpenFile() throws IOException //OpenFile method
    {
        FileReader fr = new FileReader(path);
        BufferedReader textReader = new BufferedReader(fr);

        int numberOfLines = readLine();
        String[] textData = new String[numberOfLines];

        int i;

        for (i=0; i < numberOfLines; i++) 
        {
            textData[i] = textReader.readLine();
        }

        textReader.close();
        return textData;
    }

    int readLine() throws IOException //readLines Method
    {
        FileReader file_to_read = new FileReader(path);
        BufferedReader bf = new BufferedReader(file_to_read);

        String aLines;
        int numberOfLines = 0;

        while ((aLines = bf.readLine()) !=null) 
        {
            numberOfLines++;
        }
        bf.close();

        return numberOfLines;

    }
}

Answer 1

问题是JAVA COMPILER在文件夹文本文件中寻找CLASS FILE {ReadFile.class}，所以按照这个来编译，

1 - ＆GT;使用此

编译ReadFile

javac -d . ReadFile.java

2 - ＆GT;使用此

编译FileData

javac -d . FileData.java

注意：此目的

-d

是否会在编译期间创建适当的包。

我找不到错误

1 个答案: