File operation
import java.io.*;
import java.util.Scanner;
class file {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String fileName = "MSC 1.txt";
int choice;
do {
System.out.println("\nFile Operations Menu:");
System.out.println("1. Create a File");
System.out.println("2. Write to the File");
System.out.println("3. Read from the File");
System.out.println("4. Update the File");
System.out.println("5. Delete the File");
System.out.print("Enter your choice: ");
choice = scanner.nextInt();
scanner.nextLine(); // consume the newline
switch (choice) {
case 1:
createFile(fileName);
break;
case 2:
System.out.print("Enter content to write: ");
String content = scanner.nextLine();
writeToFile(fileName, content);
break;
case 3:
readFromFile(fileName);
break;
case 4:
System.out.print("Enter content to append: ");
String updateContent = scanner.nextLine();
updateFile(fileName, updateContent);
break;
case 5:
deleteFile(fileName);
break;
default:
System.out.println("Invalid choice. Please try again.");
}
} while (true);
}
public static void createFile(String fileName) {
File file = new File(fileName);
try {
if (file.createNewFile()) {
System.out.println("File created successfully: " + file.getName());
} else {
System.out.println("File already exists.");
}
} catch (IOException e) {
System.out.println("An error occurred while creating the file.");
e.printStackTrace();
}
}
public static void writeToFile(String fileName, String content) {
try (FileWriter writer = new FileWriter(fileName)) {
writer.write(content);
System.out.println("Successfully wrote to the file.");
} catch (IOException e) {
System.out.println("An error occurred while writing to the file.");
e.printStackTrace();
}
}
public static void updateFile(String fileName, String content) {
try (FileWriter writer = new FileWriter(fileName, true)) {
writer.write(content);
System.out.println("Successfully updated the file.");
} catch (IOException e) {
System.out.println("An error occurred while updating the file.");
e.printStackTrace();
}
}
public static void readFromFile(String fileName) {
try (BufferedReader reader = new BufferedReader(new FileReader(fileName))) {
String line;
System.out.println("Reading from file:");
while ((line = reader.readLine()) != null) {
System.out.println(line);
}
} catch (IOException e) {
System.out.println("An error occurred while reading from the file.");
e.printStackTrace();
}
}
public static void deleteFile(String fileName) {
File file = new File(fileName);
if (file.delete()) {
System.out.println("Deleted the file: " + file.getName());
} else {
System.out.println("Failed delete the file.");
}
}
}
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