Copies ReadableByteChannel into WritableByteChannel - Java java.nio.channels

Java examples for java.nio.channels:ReadableByteChannel

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Description

Copies ReadableByteChannel into WritableByteChannel

Demo Code


//package com.java2s;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;

public class Main {
    /**//w  ww.  ja  v a  2s  .co  m
     * Copies {@link ReadableByteChannel} into {@link WritableByteChannel}
     */
    public static void copyChannel(final ReadableByteChannel src,
            final WritableByteChannel dest) throws IOException {
        if (src == null || dest == null) {
            throw new NullPointerException("Channels: src=" + src
                    + " dest=" + dest);
        }
        final ByteBuffer buffer = ByteBuffer.allocateDirect(16 * 1024);
        while (src.read(buffer) != -1) {
            buffer.flip();
            dest.write(buffer);
            buffer.compact();
        }
        buffer.flip();
        while (buffer.hasRemaining()) {
            dest.write(buffer);
        }
    }
}

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