Practical 10 Java

File Handling Using Java:
1. Write a programme to count occurrence of a given words in a file.

package com.company;

import java.io.BufferedReader; import java.io.FileReader; public class Main {

public static void main(String[] args) { try {

String line; int count = 0;

String search = "vedant";

FileReader file = new FileReader("C:\\Users\\HP\\Desktop\\vedant.txt"); BufferedReader br = new BufferedReader(file);

while ((line = br.readLine()) != null) { String words[] = line.split(" ");

for (String word : words) { if (word.equals(search))

count++;

}

}

System.out.println("Number of occurrence of words \"" + search + "\" present in given file: " + count);

br.close();

}

catch (Exception e)

{

e.printStackTrace();

}

}

}

2. Write a program to print it seltf.

package com.company;

import java.io.BufferedReader; import java.io.FileInputStream; import java.io.InputStreamReader;

public class Main {

public static void main(String[] args) {

{

try {

FileInputStream fstream = new FileInputStream("C:\\Users\\HP\\IdeaProjects\\evenoddbythreads\\src\\com\\company\\Main

.java");//here pass the own java file name with full path

BufferedReader br = new BufferedReader(new InputStreamReader(fstream)); String s;

while ((s = br.readLine()) != null) { System.out.println(s);

}

br.close();

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

}

}

}

}

3. Write a program to display list of all the files of given directory

package com.company; import java.io.File;

import java.io.IOException;

public class Main

{

public static void main(String[] args)

{

File currentDir = new File("C:\\Users\\HP\\IdeaProjects"); displayDirectory(currentDir);

}

public static void displayDirectory(File dir)

{

try {

File[] files = dir.listFiles(); for (File file : files) {

if (file.isDirectory()) {

System.out.println("directory:"+ file.getCanonicalPath()); displayDirectory(file);

}

else {

System.out.println("file:"+ file.getCanonicalPath());

}

}

}

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

}

}

}