IO练习文件读取

import java.io.*;

public class CheckFile {

  private File f ;
  private BufferedReader bdr;
  private char[] c =new char[1024];
  private PrintWriter pw ;

  CheckFile() {

    try {

      f=new File("D:\\myRead","myText.txt");

    }catch (Exception e) {

      e.getMessage();
    }

    if(f.exists()) {

       System.out.print("文件存在"+"\n");

       try {

           bdr=new BufferedReader(new FileReader(f));

           while ((bdr.read(c,0,c.length))!=-1) {

            pw=new PrintWriter(System.out);

               pw.print(c);

               pw.flush();
           }

           pw.close();

       }catch (IOException e) {

           System.out.println(e.getMessage());
       }

    }else  {

      System.out.println("文件夹没有文件，呵呵。");
    }

  }

   public static void main (String [] args) {

     new CheckFile();

   }
}