newitemmsg.java

基于尚学堂坦克大战的基础上开发,支持多人对战,在线聊天,坦克大战网络版.

import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
import java.net.SocketException;

public class NewItemMsg implements Msg {
	int msgType = Msg.NEW_ITEM_MSG;

	TankClient tc;

	private Item item;

	public NewItemMsg(TankClient tc,Item item) {
		this.item=item;
		this.tc = tc;
	}

	public void send(DatagramSocket ds, String IP, int udpPort) {

		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		DataOutputStream dos = new DataOutputStream(baos);
		try {
			dos.writeInt(msgType);
			dos.writeInt(tc.tank.getTankId());
			dos.writeInt(item.x);
			dos.writeInt(item.y);
			dos.writeInt(item.style);
			dos.writeBoolean(item.live);
			dos.writeInt(item.step);

		} catch (IOException e) {
			e.printStackTrace();
		}
		byte[] buf = baos.toByteArray();
		try {
			DatagramPacket dp = new DatagramPacket(buf, buf.length,
					new InetSocketAddress(IP, udpPort));
			ds.send(dp);
		} catch (SocketException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}

	}

	public void parse(DataInputStream dis) {
		
		System.out.println("客户端接收一份服务端发来NewItemMsg的数据！");
        try {
        	int tankId = dis.readInt();
        	if(tankId==tc.tank.getTankId()) return;
			int x= dis.readInt();
			int y = dis.readInt();
			int style = dis.readInt();
			boolean live = dis.readBoolean();
			int step = dis.readInt();
			Item item = new Item(x,y,tc);
			item.style=style;
			item.step=step;
			item.live=live;
			tc.items.add(item);
		} catch (IOException e) {
			e.printStackTrace();
		}
        
        
	}

}