fileoperate.java~1~

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());
      }
    }
  }


}