readfile.java~2~

我用java写的词法分析器

package 编译技术;

import java.io.*;
import javax.swing.JOptionPane;

public class ReadFile
{
  FileInputStream fr;
  String filePath;
  public ReadFile(String filePath)
  {
    try
    {
      this.filePath = filePath;
      File f = new File(filePath);
      fr = new FileInputStream(filePath);
    }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;
  }
}