How Can Java's NIO Package Improve File Copying Efficiency?

Improved File Copying in Java with NIO

The conventional method of file copying in Java involves a cumbersome process of opening streams and manual data handling. However, recent Java versions offer a simpler and more efficient approach through the NIO package.

NIO introduces the FileChannel API, which provides the following functions:

• transferTo(long, long, WritableByteChannel): Transfers bytes from the current channel to a specified destination channel.
• transferFrom(ReadableByteChannel, long, long): Reads bytes from a specified source channel and writes them to the current channel.

To use these functions, you can implement a simplified file copying method:

public static void copyFile(File sourceFile, File destFile) throws IOException {
    FileChannel sourceChannel = new FileInputStream(sourceFile).getChannel();
    FileChannel destChannel = new FileOutputStream(destFile).getChannel();
    destChannel.transferFrom(sourceChannel, 0, sourceChannel.size());
    sourceChannel.close();
    destChannel.close();
}

This method eliminates the need for streams and data manipulation, providing a convenient and concise solution for file copying.

The above is the detailed content of How Can Java's NIO Package Improve File Copying Efficiency?. For more information, please follow other related articles on the PHP Chinese website!