Java Files

File handling is an important part of any application.

In Java, the term "files" can refer to various concepts related to file handling, input/output operations, and file manipulation..

Java File Handling

Java file handling involves performing operations on files and directories, such as reading from or writing to files, creating or deleting files, and managing directories. The core packages for file handling in Java are java.io (traditional I/O) and java.nio.file (NIO, introduced in Java 7 for more advanced I/O operations). Here's an overview of some common file handling operations using both approaches:

Traditional I/O (java.io package):

Reading from a File:

 import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class ReadFromFile {
    public static void main(String[] args) {
        try (BufferedReader reader = new BufferedReader(new FileReader("example.txt"))) {
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
              

Writing to a File:

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;

public class WriteToFile {
    public static void main(String[] args) {
        try (BufferedWriter writer = new BufferedWriter(new FileWriter("example.txt"))) {
            writer.write("Hello, World!");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}