files

import java.io.*;

class WSExample1
{
    public static void main(String args[])
    {
        write("C:/dell/file.txt");
        read("C:/dell/file.txt");
        copy("C:/dell/file.txt","C:/dell/copiedfile.txt");
        //delete("C:/dell/file.txt");

        append("C:/dell/copiedfile.txt");
    }



     public static int write(String path)
     {
        try
        {

            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            String str;

              BufferedWriter out = new BufferedWriter(new FileWriter(path));


            System.out.println("Enter lines of text.");
            System.out.println("Enter 'end' to quit.");
            do {

                str = br.readLine();
                if(!str.equals("end"))
                {
                out.write(str);
                out.newLine();
                }

              } while(!str.equals("end"));
              out.close();
        }

        catch(IOException ioe){
                System.out.println("Exception at write");
            }
      return 0;
    }


    public static int read(String path)
     {
        try
        {

            BufferedReader br = new BufferedReader(new FileReader(path));
            String str;


            System.out.println("The contents of the file are");

            String line = br.readLine();
            while(line!=null)
            {
                System.out.println(line);
                line = br.readLine();
            }

            br.close();
        }


        catch(IOException ioe)
            {
                System.out.println("Exception at read");
            }
      return 0;
    }

    public static int delete(String path)
    {
        try{

            File f= new File(path);

            if(f.delete())
            {
                System.out.println("file deleted");
            }

            else
            {
                System.out.println("Delete failed.");
            }

        }

        catch(Exception e){
            System.out.println("Exception at DELETE");
        }

        return 0;

    }




    public static int copy(String path1, String path2)
     {
        try
        {

            BufferedReader br = new BufferedReader(new FileReader(path1));
             BufferedWriter out = new BufferedWriter(new FileWriter(path2));
            String str;




            String line = br.readLine();
            while(line!=null)
            {
                out.write(line);
                out.newLine();
                line = br.readLine();
            }

            br.close();
            out.close();
        }


        catch(IOException ioe)
            {
                System.out.println("Exception at read");
            }
      return 0;
    }



    public static int append(String path)
     {
        try
        {

            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            String str;

              BufferedWriter out = new BufferedWriter(new FileWriter(path, true )); //FileWriter(file path,boolean append )


            System.out.println("Enter lines of text to append to " + path);
            System.out.println("Enter 'end' to quit.");
            do {
                str = br.readLine();
                if(!str.equals("end"))
                {
                out.write(str);
                out.newLine();
                }

              } while(!str.equals("end"));
              out.close();
        }

        catch(IOException ioe){
                System.out.println("Exception at write");
            }
      return 0;
    }


}