Read,Write,Copy and Delete File in Java

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class TestClass {

 public static void main(String[] args) {

  readFile();
  writeFile();
  copyFile();
  deleteFile();

 }

 public static void readFile() {
  try {
   String _line;
   FileReader _file = new FileReader("D:\\TestFile.txt");
   BufferedReader _buffer = new BufferedReader(_file);
   while ((_line = _buffer.readLine()) != null) {
    System.out.println(_line);

   }
  } catch (FileNotFoundException e) {

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

   e.printStackTrace();
  }
 }

 public static void writeFile() {
  File file = new File("D:\\NewTestFile.txt");

  FileWriter fw = null;
  try {
   fw = new FileWriter(file);
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  BufferedWriter bw = new BufferedWriter(fw);
  try {
   bw.write("Decoderr:Java Blog");
   bw.close();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

  System.out.println("Done");
 }

 public static void deleteFile() {

  File file = new File("D:\\NewTestFile.txt");

  boolean success = file.delete();
  if (success) {

   System.out.println("File " + file.getName() + " is deleted");
  } else {
   System.out.println("Can not delete file " + file.getName());
  }
 }

 public static void copyFile() {

  FileInputStream inputStream = null;
  FileOutputStream outputStream = null;

  try {
   File oldFile = new File("D:\\TestFile.txt");
   File newFile = new File("D:\\NewTestFile.txt");

   inputStream = new FileInputStream(oldFile);
   outputStream = new FileOutputStream(newFile);

   byte[] buffer = new byte[1024];

   int length;

   while ((length = inputStream.read(buffer)) > 0) {
    outputStream.write(buffer, 0, length);
   }

   inputStream.close();
   outputStream.close();

   System.out.println("File copied");
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
}

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