import java.net.*;
import java.io.*;
public class DatagramSendDemo 
{
	public static void main(String[] args) 
	{
		try
		{
			//聲明并創(chuàng)建DatagramSocket對(duì)象，并指定發(fā)送方程序發(fā)送數(shù)據(jù)端口為10700
			DatagramSocket sendSocket = new DatagramSocket(10700);
			
			//創(chuàng)建并初始化所要發(fā)送的字符串?dāng)?shù)據(jù)，并轉(zhuǎn)換為字符數(shù)組
			String str = "Hello World!";
			byte data[] = new byte[str.length()];
			data = str.getBytes();
			
			//創(chuàng)建發(fā)送數(shù)據(jù)包，并指定接收主機(jī)為本地主機(jī)地址
			DatagramPacket sendPacket = new DatagramPacket(
					data,str.length(),InetAddress.getLocalHost(),10745);
			
			//發(fā)送數(shù)據(jù)
			sendSocket.send(sendPacket);
			System.out.println("Send data is:");
			System.out.println(str);
		}
		catch(IOException e){e.printStackTrace();}
	}
}