readfile.java~7~

我用java写的词法分析器

package 编译技术;

import java.io.*;

import javax.swing.*;

public class ReadFile
{
  FileInputStream fr;
  String filePath;
  public ReadFile(String filePath)
  {
    try
    {
      this.filePath = filePath;
      File f = new File(filePath);
      fr = new FileInputStream(f);
    }
    catch (IOException e)
    {
      JOptionPane.showMessageDialog(null, "读取文件出错了", "出错",
                                    JOptionPane.OK_OPTION);
    }
  }

  public String ReadALine()
  {
    String string = "";
    try
    {
    }
    catch (Exception eve)
    {
      //
    }
    return string;
  }
}