A program for copying a text file using Java

copy.java

/**

  
  [Api Call Example "Copy a file"]

  == How to run it ==

  1 - Compile it
      javac copy.java

  2 - Run it
      java copy [source] [destiny]

  ** [source] is the path to the original file
  ** [destiny] is the path where the file will be copied

  Enjoy it!

*/

import java.io.*;

public class copy{

  public copy(String source, String destiny){
    System.out.println("Copying from "+source+ " to " + destiny);
    if(this.startCopy(source, destiny)){
      System.out.println("Copy successful from "+destiny+" to "+destiny+"!");
    }else{
      System.out.println("An unkown error has ocurred!");
    }
  }

  public boolean startCopy(String source, String destiny){
    //Checar si destiny existe como archivo
     String line = null;
     try{
        BufferedReader br = new BufferedReader(new FileReader(source));
        PrintWriter   out = new PrintWriter(new BufferedWriter(new FileWriter(destiny)));
        while ((line = br.readLine()) != null) {
           //System.out.println(line);
           out.write(line+"\n");
        }
        br.close();
        out.close();
     }catch(Exception e){
        e.printStackTrace();
        return false;
     }
     return true;
  }

  public static boolean validate(String[] args){

    if(args.length>1){
      File source  = new File(args[0]);
      File destiny = new File(args[1]);
      if(source.exists() && !source.isDirectory() ) {
        if(!destiny.exists() && !destiny.isDirectory() ) {
          return true;
        }else{
          System.out.println("Error, destiny file "+destiny+" already exists, try again \n");
          return false;
        }
      }else{
        System.out.println("Error, source file "+source+" doesn't exists, try again \n");
        return false;
      }
    }

    return false;
  }

  public static void main(String[] args) {
    if(validate(args)){
      copy cp = new copy(args[0], args[1]);
    }else{
      System.out.println("How it works, type: \n 'java copy \t [Path to source file] \t [Path to the destiny] ' \nin your terminal \n\nBuilt by Diego Zamora Rodríguez <a01227598>\n");
    }
  }
}