File Handling?

 Creating Fine On Disk??

Program:

import java.io.File;

import java.io.IOException;

public class MainClass {

public static void main(String[] args) {

File file = new File("readfile.txt");

try {

file.createNewFile();

System.out.println("File Created");

} catch (IOException e) {

e.printStackTrace();

}

}

}

Program For Create Directory:

import java.io.File;

import java.io.IOException;

public class CreataDirectory {

public static void main(String[] args) {

// File directory=new File("test");

// directory.mkdir();

// System.out.println("Direcroty is created....");

File directory = new File("package/org/goomo"); // for Ubuntu or Mac

// File directory = new File("package\\org\\goomo"); // for windows

directory.mkdirs();

System.out.println("Direcroty is created....");

File file = new File("package/org/goomo/test.txt");

System.out.println("File created");

try {

file.createNewFile();

} catch (IOException e) {

e.printStackTrace();

}

}

}

Program for write onto File:

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

public class WriteIntoFile {

public static void main(String[] args) {

File directory = new File("package/org/goomo");

directory.mkdirs();

System.out.println("Direcroty is created....");

directory = new File("package/org/goomo/test.txt");

System.out.println("File created");

try {

directory.createNewFile();

} catch (IOException e) {

e.printStackTrace();

System.out.println("Error Occured");

}

try (BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(directory,true))) {

bufferedWriter.write("Pankaj");

bufferedWriter.newLine();

bufferedWriter.write("Jatan Veer");

bufferedWriter.close();

System.out.println("Writing data to file is done ....");

} catch (IOException e) {

             System.out.println("Error occured duing writing onto file...");

}

}

}

Program for Reading file with BufferedReader

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

public class WriteIntoFile {

public static void main(String[] args) {

File directory = new File("package/org/goomo");

directory.mkdirs();

System.out.println("Direcroty is created....");

directory = new File("package/org/goomo/test.txt");

System.out.println("File created");

try {

directory.createNewFile();

} catch (IOException e) {

e.printStackTrace();

System.out.println("Error Occured");

}

try (BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(directory, true))) {

bufferedWriter.write("Pankaj kumar");

bufferedWriter.newLine();

bufferedWriter.write("Jatan Veer");

bufferedWriter.newLine();

bufferedWriter.close();

System.out.println("Writing data to file is done ....");

} catch (IOException e) {

System.out.println("Error occured duing writing onto file...");

}

try {

BufferedReader bufferedReader = new BufferedReader(new FileReader("package/org/goomo/test.txt"));

String line;

System.out.println("=================================");

while ((line = bufferedReader.readLine()) != null) {

System.out.println(line);

}

bufferedReader.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

Read file using scanner class:

import java.io.File;

import java.io.FileNotFoundException;

import java.util.Scanner;

public class ReadFileWithScanner {

public static void main(String[] args) {

try {

Scanner scanner = new Scanner(new File("test.txt"));

String line;

while (scanner.hasNext()) {

line = scanner.nextLine();

System.out.println(line);

}

scanner.close();

} catch (FileNotFoundException e) {

e.printStackTrace();

System.out.println("Error occured during reading file...");

}

}

}

Delete file Program

import java.io.File;

public class DeleteFile {

public static void main(String[] args) {

File file = new File("goomo/test.txt");

if (file.delete()) {

System.out.println("Deleted successfully.....");

} else {

System.out.println("Error occued while delet file....");

}

}

}