fileoperate.java

手机端游戏开发程序

package stock;

import java.io.*;

/**
 * 写文件
 * @param fileName 文件名
 * @param s
 * @throws Exception
 */
public class FileOperate
{
  String fileName;
  File f;
  public FileOperate(String fileName)
  {
    this.fileName = fileName;
    f = new File(fileName);
  }

  public String readFileALine()
  {

    try
    {
      FileReader fr = new FileReader(fileName);
      String s = new BufferedReader(fr).readLine();
      fr.close();
      return s;
    }
    catch (IOException ex1)
    {
      return null;
    }

  }

  public boolean emptyFile()
  {
    //if(!fileName.equals(null))
    if (f.isFile())
    {
      System.out.print("ok");
    }
    return (f.delete());
  }

  public void write2File(String s)
  { //throws Exception
    FileWriter out = null;
    try
    {
      out = new FileWriter(fileName, true);
      out.write(s);
      out.write("\r\n");
      out.close();
    }
    catch (Exception e)
    {
      System.out.println(e.getMessage());
    }
    finally
    {
      try
      {
        if (out != null)
        {
          out.close();
        }
      }
      catch (Exception e2)
      {
        System.out.println(e2.getMessage());
      }
    }
  }

}