public static void writeToFile(String name, ArrayList list){
        if(name != null && list != null){
            try{
                BufferedWriter bw = new BufferedWriter(new FileWriter(name));
                for(String s : list){
                    bw.write(s + "\n");
                }
                bw.close();
            }catch(IOException io){
                io.printStackTrace();
            }
        }
    }

    public static void readFile(String name, ArrayList list){
        try{
            if(name != null && list != null){
                BufferedReader br = new BufferedReader(new FileReader(name));        
                String line = null;
                while( (line = br.readLine()) != null){
                    list.add(line);
                }
            }
        }catch(IOException io){
            io.printStackTrace();
        }
    }

    public static void readWriteFileStream(String fromFile, String toFile){
        if(fromFile != null && toFile != null){
            try{
                FileInputStream inStream = new FileInputStream(fromFile);
                FileOutputStream outStream = new FileOutputStream(toFile);
                int byteChar = -1;
                while((byteChar = inStream.read()) != -1){
                    outStream.write(byteChar); 
                }
                if(outStream != null)
                    outStream.close();
                if(inStream != null)
                    inStream.close();

            }catch(IOException io){
                io.printStackTrace();
            }
        }
    }