比較蛋疼，估計是引用對象太多了，而tcp中客戶端未連接他就不建立線程，但是UDP一直引用對象建立線程，導致CPU飆升

可以在while循環語句里添加 ? break； 語句塊

UDPServer.java?//服務端
========================================
package?UDP;

import?java.net.DatagramPacket;
import?java.net.DatagramSocket;

public?class?UDPServe?{
	public?static?void?main(String[]?args)?{

		try?{
			DatagramSocket?socket?=?new?DatagramSocket(9099);
			System.out.println("Serve?is?waiting...");

			byte[]?data?=?null;

			DatagramPacket?packet?=?null;

			while?(true)?{

				data?=?new?byte[1024];
				packet?=?new?DatagramPacket(data,?data.length);

				socket.receive(packet);

				UDPServeThread?thread?=?new?UDPServeThread(socket,?data,?packet);
				thread.start();
			}
			//?socket.receive(packet);
		}?catch?(Exception?e)?{
			//?TODO?Auto-generated?catch?block
			e.printStackTrace();
		}

	}
}

UDPServerThread.java???//服務線程
package?UDP;

import?java.net.DatagramPacket;
import?java.net.DatagramSocket;
import?java.net.InetAddress;

public?class?UDPServeThread?extends?Thread?{

	DatagramSocket?socket?=?null;

	byte[]?data?=?null;

	DatagramPacket?packet?=?null;

	public?UDPServeThread(DatagramSocket?socket,?byte[]?data,
			DatagramPacket?packet)?{
		this.data?=?data;
		this.socket?=?socket;
		this.packet?=?packet;
	}

	@Override
	public?void?run()?{

		try?{

			System.out.println("Serve?is?waiting...3");
			String?info?=?new?String(data,?0,?packet.getLength());

			System.out.println("Receive?Client?"?+?info);

			//?響應數據
			InetAddress?address?=?packet.getAddress();
			int?port?=?packet.getPort();
			byte[]?dataReply?=?"welcome".getBytes();
			DatagramPacket?packetReply?=?new?DatagramPacket(dataReply,
					dataReply.length,?address,?port);
			socket.send(packetReply);

		}?catch?(Exception?e)?{
			e.printStackTrace();
		}finally{
//			socket.close();
		}

		super.run();
	}
}

我的也是，是不是不該創建那么多datagrampacket或者是沒有關閉的原因，while一開，內存使用率直逼99%。