Netty Int Array Codec

IntArrayCodec.java

import java.util.Arrays;
import java.util.Random;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.UnpooledByteBufAllocator;

public class IntArrayCodec {
	static final int MAP_WIDTH = 10;
	static final int MAP_HEIGHT = 10;
	static final Random RANDOM = new Random(System.currentTimeMillis());
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		int[][] map = new int[MAP_WIDTH][MAP_HEIGHT];
		for(int w = 0; w < MAP_WIDTH; w++) {
			for(int h = 0; h < MAP_HEIGHT; h++) {
				map[w][h] = RANDOM.nextInt();
			}
		}
		ByteBuf buf = fromArray(MAP_WIDTH, MAP_HEIGHT, map);
		int[][] newMap = fromBuf(buf);
		if(Arrays.deepEquals(map, newMap)) {
			System.out.println("Arrays Match");
		} else {
			System.err.println("Array Mismatch");
		}

	}
	
	static ByteBuf fromArray(int width, int height, int[][] map) {
		ByteBuf buf = UnpooledByteBufAllocator.DEFAULT.buffer((width * height * 4) + 8);
		buf.writeInt(width);
		buf.writeInt(height);
		for(int w = 0; w < width; w++) {
			for(int h = 0; h < height; h++) {
				buf.writeInt(map[w][h]);
			}
		}
		// rewind the buff (not needed when transmitting)
		buf.readerIndex(0);
		return buf;
	}
	
	
	static int[][] fromBuf(ByteBuf buf) {
		int width = buf.readInt();
		int height = buf.readInt();
		int[][] map = new int[width][height];
		for(int w = 0; w < width; w++) {
			for(int h = 0; h < height; h++) {
				map[w][h] = buf.readInt();
			}
		}
		return map;
	}

}