udpclientaction.java

uml ooad 有ppt文件 和源码哦！跟大家分享

package client;
import java.io.IOException;
import java.net.*;
public class UDPClientAction implements ClientAction{
	DatagramSocket ds;

	public UDPClientAction() {
		super();
		try {
			this.ds = new DatagramSocket();
		} catch (SocketException e) {
			e.printStackTrace();
		}
	}

	public String receive() {
		DatagramPacket letter=new DatagramPacket(new byte[1024],0,1024);
		try {
			ds.receive(letter);
		} catch (IOException e) {
			e.printStackTrace();
		}
		return new String(letter.getData(),letter.getOffset(),letter.getLength());
	}

	public void send(String text) {
		try {
			byte[] bs=text.getBytes();
			DatagramPacket letter=new DatagramPacket(bs,0,bs.length,InetAddress.getLocalHost(),9000);
			ds.send(letter);
		} catch (UnknownHostException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
}