Transcription

1

2

3

4

5

6 import java.net.socket; import java.net.serversocket; import java.io.ioexception; /* Java Server */ public class Nets static Socket thesocket; static ServerThread client[] = new ServerThread[10]; static ServerSocket theserversocket; static Data rundata = new Data(); public static void main(string args[]) throws IOException int i; System.out.println("Server coming up..."); theserversocket = new ServerSocket(1234); rundata.start(); /* Data */ while (true) thesocket = theserversocket.accept(); /* Client connect */ for (i=0;i<10;i++) if ((client[i] == null) (!client[i].isalive())) break; /* */ if (i<10) client[i] = new ServerThread(theSocket); /* */ client[i].start(); System.out.println("Connect client " + i);

7 else System.out.println("Rejected a connection..."); import java.net.socket; import java.io.*; import java.awt.*; /* Server port program */ public class ServerThread extends Thread public static double All[] = new double[12]; Socket mysocket; DataInputStream datain; DataOutputStream dataout; public ServerThread(Socket s) throws IOException mysocket = s; datain = new DataInputStream(new BufferedInputStream(mySocket.getInputStream())); dataout = new DataOutputStream(new BufferedOutputStream(mySocket.getOutputStream())); public void run() System.out.println("Client come from " + datain.readline()); while (talk()) /* Client */ yield(); mysocket.close(); catch (IOException E) ; System.out.println("Client game over!"); synchronized private boolean talk() throws IOException int i; char x; x = datain.readchar(); System.out.println("Accept: " + x); if(x == 'Q') return false; /* Client */ if(x == 'A') /* Client */ for (i=0;i<12;++i)

8 dataout.writedouble(all[i]); /* Client */ System.out.print(" Out: " + All[i]); System.out.println(""); dataout.flush(); return true; import java.io.*; import java.awt.*; /* */ * */ /*,... */ public class Data extends Thread public static double All[] = new double[12]; public Data() int i; for(i=0;i<12;i++) All[i] = 0.0; public void run() int i, counter = 0; while(true) counter ++; ServerThread.All[0] = (double)counter; for(i=1; i<12; i++) ServerThread.All[i] = java.lang.math.random() * 10.; /* */ Thread.sleep(1000); catch(interruptedexception e) import java.awt.*; import java.io.*;

9 import java.net.*; import java.applet.applet; /* * class for the "Client" Applet */ public class client extends Applet implements Runnable TextField addrfield; TextField statusfield; Button openbutton; Button closebutton; Button nextbutton; Panel p1, p2; TextField datafield[] = new TextField[12];; double now_data[] = new double[12]; Socket socket; DataInputStream in; DataOutputStream out; Thread thread; String hostname = new String(); public void init () int i; this.setlayout(new BorderLayout()); addrfield = new TextField(" ", 20); statusfield = new TextField("Data", 40); for(i=0;i<12;i++) datafield[i] = new TextField("0.0", 10); resize (500, 500); p1 = new Panel (); p1.setlayout (new FlowLayout ()); p2 = new Panel (); p2.setlayout (new FlowLayout ()); add ("North", p1); add ("Center", p2); p1.add (new Label ("Address")); p1.add (addrfield); p1.add (openbutton = new Button ("Open")); p1.add (closebutton = new Button ("Close")); p1.add (nextbutton = new Button ("Next")); p2.add (new Label ("Data List:")); p2.add (statusfield); for(i=0;i<12;i++) p2.add(datafield[i]); thread = new Thread (this); public boolean action (Event evt, Object arg) if (evt.target == openbutton evt.target == addrfield)

10 thread.stop (); thread = new Thread (this); thread.start (); else if (evt.target == nextbutton) out.writechar('a'); out.flush(); catch (IOException e) statusfield.settext("write Error..."); else if (evt.target == closebutton) out.writechar('q'); out.flush(); catch (IOException e) statusfield.settext("write Error..."); thread.stop (); return true; public void destroy() out.writechar('q'); out.flush(); catch (IOException e) statusfield.settext("write Error..."); socket.close(); catch (IOException e) thread.stop(); public void run () int i; socket = new Socket (addrfield.gettext (), 1234); catch (UnknownHostException e) statusfield.settext("unknown host\n"); return; catch (IOException e2)

11 statusfield.settext("unable to open socket\n"); return; in = new DataInputStream(new BufferedInputStream(socket.getInputStream())); out = new DataOutputStream(new BufferedOutputStream(socket.getOutputStream())); catch (IOException e) statusfield.settext("unable to open streams\n"); return; statusfield.settext("connect..."); hostname = InetAddress.getLocalHost().toString() + "\n"; catch (UnknownHostException e) hostname = "Unknown address\n"; out.writechars(hostname); out.flush(); catch (IOException e) statusfield.settext("write data Error!"); thread.stop (); while (true) out.writechar('a'); out.flush(); catch (IOException e) statusfield.settext("write data Error!"); thread.stop (); for(i=0;i<12;i++) now_data[i] = in.readdouble(); catch (IOException e) statusfield.settext("read data Error!"); thread.stop ();

12 statusfield.settext("new Data"); for(i=0;i<12;i++) datafield[i].settext(string.valueof(now_data[i])); Thread.sleep(2000); catch(interruptedexception e) <html> <head> <title> Monitor Page </title> </head> <applet code="client.class" width=400 height=400> </applet> <hr size=4> </html>