1、惠州学院计算机科学系网络工程专业Software Engineering Laboratory, Dept. of Computer Science and Technology, Huihzou UniversityTELimport .*;import java.util.*;public class Server public static void main(String args)ServerSocket server=null;ServerThread thread;Socket you=null;while(true)tryserver=new ServerSocket(2010
2、);catch(IOException el)System.out.println(“正在监听“);trySystem.out.println(“等待客户呼叫 “);you=server.accept();System.out.println(“客户的地址： “+you.getInetAddress();catch(IOException e)System.out.println(“正在等待客户 “);if(you!=null)new ServerThread(you).start();惠州学院计算机科学系网络工程专业Software Engineering Laboratory, Dept.
3、 of Computer Science and Technology, Huihzou UniversityTELDataOutputStream out=null;DataInputStream in=null;String s=null;ServerThread(Socket t)socket=t;tryout=new DataOutputStream(socket.getOutputStream();in=new DataInputStream(socket.getInputStream();catch(IOException e)public void run()while(true
4、)trydouble a=in.readDouble();double b=in.readDouble();double c=in.readDouble();if(a+b=c|a+c=b|b+c=a)double area=-1;out.writeDouble(area);elsedouble p=(a+b+c)/2;double A=(p*(p-a)*(p-b)*(p-c);double area=Math.sqrt(A);out.writeDouble(area);catch(IOException e)System.out.println(“客户离开“);return;private d
5、ouble sqrt(double q) return 0;惠州学院计算机科学系网络工程专业Software Engineering Laboratory, Dept. of Computer Science and Technology, Huihzou UniversityTELpublic class Read implements Runnable DataInputStream in;public void setDataInputStream(DataInputStream in)this.in=in;public void run()double result=0;while(t
6、rue)tryresult=in.readDouble();if(result0)System.out.println(“你输入的三条边长不能组成三角形“);System.out.println(“重新输入三角形的三条边长（放弃请输入N）：“);elseSystem.out.println(“三角形的面积为：“+result);System.out.println(“输入三角形的三条 边长（放弃请输入N）：“);catch(IOException e)System.out.println(“与服务器已断开“+e);break;import java.io.*;import .*;import
7、java.util.*;public class client public static void main(String args)Scanner scanner=new Scanner(System.in);Socket mysocket=null;DataInputStream in=null;DataOutputStream out=null;Thread readData;惠州学院计算机科学系网络工程专业Software Engineering Laboratory, Dept. of Computer Science and Technology, Huihzou Univers
8、ityTELtrymysocket=new Socket();read=new Read();readData = new Thread(read);System.out.print(“请输入服务器的IP地址 :“);String IP=scanner.nextLine();System.out.print(“请输入端口号：“);int port=scanner.nextInt();if(mysocket.isConnected()elseInetAddress address=InetAddress.getByName(IP);InetSocketAddress socketAddress=
9、new InetSocketAddress(address,port);mysocket.connect(socketAddress);in=new DataInputStream(mysocket.getInputStream();out=new DataOutputStream(mysocket.getOutputStream();read.setDataInputStream(in);readData.start();catch(Exception e)System.out.print(“服务器已经断开“+e);System.out.println(“请输入三角形的三条边长 （放弃请输入
10、N）：“);while(scanner.hasNext()double a=0;double b=0;double c=0;trya=scanner.nextDouble();b=scanner.nextDouble();c=scanner.nextDouble();catch(InputMismatchException exp)System.exit(0);tryout.writeDouble(a);out.writeDouble(b);out.writeDouble(c);惠州学院计算机科学系网络工程专业Software Engineering Laboratory, Dept. of Computer Science and Technology, Huihzou UniversityTEL& FAX：0752-2527101， Website：http:/惠州市惠城区演达大道 46 号 邮编：516007 6catch(Exception e)运行结果：
