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import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;
import java.nio.channels.WritableByteChannel;
import java.util.Scanner;
// Transfer data from 1 file to other file using Java-NIO
public class TransferData {
public static void main(String[] args) {
try (Scanner scanner = new Scanner(System.in)) {
System.out.println("Select The opetion That Listed below : ");
System.out.println("1 : TransferTo");
System.out.println("2 : TransferFrom");
switch (scanner.next()) {
case "1":
// Destination File
FileOutputStream outputStream = new FileOutputStream(new File("G:/1.txt"));
WritableByteChannel destinationChannel = outputStream.getChannel();
// Write Data in Source File
FileOutputStream sourceFileStream = new FileOutputStream("G:/12.txt");
sourceFileStream.write("Data Write in Source File".getBytes());
sourceFileStream.close();
// Source File open with read mode
FileInputStream inputStream = new FileInputStream(new File("G:/12.txt"));
FileChannel sourceChannel = inputStream.getChannel();
sourceChannel.transferTo(0, sourceChannel.size(), destinationChannel);
sourceChannel.close();
inputStream.close();
System.out.println("Successfully Transfer The Data from '1.txt' to '12.txt'");
break;
case "2":
FileOutputStream outputStream2 = new FileOutputStream(new File("G:/22.txt"));
outputStream2.write("Write Data in source file".getBytes());
outputStream2.close();
// by Using Random Access File with JAVA-NIO
RandomAccessFile sourceFile = new RandomAccessFile("G:/22.txt", "r");
FileChannel sourceChannelFrom = sourceFile.getChannel();
RandomAccessFile destFile = new RandomAccessFile("G:/33.txt", "rw");
FileChannel destinationChannelFrom = destFile.getChannel();
destinationChannelFrom.transferFrom(sourceChannelFrom, 0, sourceChannelFrom.size());
System.out.println("Successfully Transfer The Data from '22.txt' to '33.txt'");
break;
}
} catch (Exception e) {
e.printStackTrace();
}
}
}