JAVA模仿DOS的copy命令

import java.io.*;
public class copymaker {

 /**將源文件內容複製到目標文件
  * @param args
  */
 String sourceName,destName;
 BufferedReader source;
 BufferedWriter dest;
 String line;
 
 private boolean openFile()
 {
  try
  {source=new BufferedReader(new FileReader(sourceName));
  }//try
  catch(IOException iox)
  {System.out.println("Problem opening"+sourceName);
  return false;
  }
  
  try
  {dest=new BufferedWriter(new FileWriter(destName));}
  catch(IOException iox )
  {System.out.println("Problem opening"+destName);
  return false;}//catch
  return true;
  
 }//openFile
 
 private boolean copyFile()
 {
  try
  {
   line=source.readLine();
   while(line!=null)
   {
    dest.write(line);
    dest.newLine();
    line=source.readLine();
   }//while
  }//try
  catch(IOException iox)
  {
   System.out.println("Problem writing and reading");
   return false;
  }//catch
  return true;
 }//copyFile
 
 private boolean closeFile()
 {
    try
    {source.close();
    dest.close();}
    catch(IOException iox)
    {System.out.println("problem closing");
    return false;}
    return true;
 }//closeFile
 
 public boolean copy(String src,String des)
 {
  sourceName=src;
  destName=des;
  return openFile()&&copyFile()&&closeFile();
 }//copy
 public static void main(String[] args) {
  // TODO Auto-generated method stub
        if(args.length==2)
      
        new copymaker().copy(args[0], args[1]);
        else
         System.out.println("Please Enter filename");
       
 }

}