📁 *Java File I/O (Input/Output)* 🔄 🧾 *1. Reading Files* • Using `File` + `Scanner`: ```java File file = new File("data.txt"); Scanner sc = new Scanner(file); while (sc.hasNextLine()) { System.out.println(sc.nextLine()); } ``` • Using `BufferedReader`: ```java BufferedReader br = new BufferedReader(new FileReader("data.txt")); String line; while ((line = br.readLine()) != null) { System.out.println(line); } br.close(); ``` 📝 *2. Writing to Files* • Using `FileWriter`: ```java FileWriter fw = new FileWriter("output.txt"); fw.write("Hello, World!"); fw.close(); ``` • Using `BufferedWriter`: ```java BufferedWriter bw = new BufferedWriter(new FileWriter("output.txt")); bw.write("This is a new line."); bw.newLine(); bw.write("Another line."); bw.close(); ``` 🔐 *3. Best Practices* ✅ Always close files (`close()` method) ✅ Use `try-with-resources` to auto-close ✅ Handle exceptions (`IOException`) 💡 *Tip:* Try building a mini text editor or log analyzer to practice! Java Roadmap: https://whatsapp.com/channel/0029VamdH5mHAdNMHMSBwg1s/810 *React ❤️ for more* ✨📂