/*
 * Regards to file operation
 */
import java.io.*;
import java.text.SimpleDateFormat;

class FileRelated{

	public static void main(String args[]){
		String s = "Something to write.";
		FileOutputStream fos = null;
		FileInputStream fis = null;
		BufferedInputStream bis = null;
		try{
			//*
			// To create a file
			File file = new File("afile.txt");// or "E:\\afile.txt" to specify the directory
			if (file.createNewFile())
				System.out.println("File is created successfully.");
			else
				System.out.println("File is already existed.");
			//*/
			//*


			// Write to a file >>> FileOutputStream vs. BufferedWriter
			// File file = new File("afile.txt");// >> to connect to a file
			fos = new FileOutputStream(file); // throws FileNotFoundException
			if(!file.exists()){
				file.createNewFile();
			}
			byte[] bytes = s.getBytes();
			fos.write(bytes);
			fos.flush();
			fos.close();
			System.out.println("File written successfully.");
			//*/

			//*
			// Read a file >>> BufferedInputStream vs. BufferedReader
			//File file = new File("afile.txt");// >> to connect to a file
			fis = new FileInputStream(file); // throws FileNotFoundException
			bis = new BufferedInputStream(fis);
			while(bis.available() > 0){
				System.out.print((char)bis.read());
			}//while
			fis.close();
			bis.close();
			//*/

			//*
			// Append content to a file >>> (BufferedWriter, FileWriter), PrintWriter
			FileWriter fw = new FileWriter(file, true);
			BufferedWriter bw = new BufferedWriter(fw);
			bw.write("\nSomething more......");
			bw.close();
			System.out.println("Append Successfully.");

			// try PrintWriter......
			//*/
			PrintWriter pw = new PrintWriter(file);
			pw.write("Write something using PrintWriter...");
			pw.append("\nMore to write......");
			pw.print("\nPrint can automatically append......");
			pw.flush();
			pw.close();
			//*
			// Get the last modified Date >> import java.text.SimpleDateFormat;
			SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");
			//System.out.println(file.lastModified());
			System.out.println("Last Modified Date: " + sdf.format(file.lastModified()));
			//*/


			/*
			// Rename a file......
			File file2 = new File("bfile.txt");
			boolean flag = file.renameTo(file2);
			if(flag)
				System.out.println("Rename Successfully.");
			else
				System.out.println("Rename failed.");

			//*/


			/*
			// Delete a file >> make sure all the connections are close() before delete
			if(file.delete()){
				System.out.println(file.getName() + " is deleted.");
			}else{
				System.out.println("Delete failed.");
			}//else
			//*/


		}catch(FileNotFoundException e){ // Need to be previous to IOException or simply use IOException

			e.printStackTrace();

		}catch(IOException e){

			e.printStackTrace();

		}catch(Exception e){

			e.printStackTrace();

		}finally{
			/*
			try{
				// You may move this part to the other try clause
				fos.close();
				fis.close();
				bis.close();
			}catch(IOException ioe){
				System.out.println("Error in closing file.");
			}//catch
			//*/
		}//catch

	}//main()

}//FileRelated