Java Online chat project version 0.6 resolves an exception problem after a client shutdown Dis.readutf () loops through the closed socket

The service side re-defines the try catch Finally, when an exception occurs, the active prompt, or the closing of the socket where the exception occurred

The server-side code is modified as follows:

 PackageCom.swift;ImportJava.io.DataInputStream;Importjava.io.IOException;ImportJava.net.ServerSocket;ImportJava.net.Socket; Public classChatserver { Public Static voidMain (string[] args) {BooleanStarted=false; ServerSocket SS=NULL; DataInputStream Dis=NULL; Socket s=NULL; Try{SS=NewServerSocket (8888); Started=true; } Catch(IOException E1) {//TODO auto-generated Catch blockE1.printstacktrace (); }        Try {             while(started) {BooleanConnected=false; S=ss.accept (); Connected=true; System.out.println ("A client connected success"); Dis=NewDataInputStream (S.getinputstream ());  while(connected) {String str=Dis.readutf ();                System.out.println (str); }            }        } Catch(Exception e) {//e.printstacktrace ();SYSTEM.OUT.PRINTLN ("client has closed."); }finally {            if(dis!=NULL) {                Try{dis.close (); } Catch(IOException e) {e.printstacktrace (); }            }            if(s!=NULL) {                Try{s.close (); } Catch(IOException e) {e.printstacktrace (); }            }        }    }}

The client has changed a OutputStream, uses DataOutputStream to send the message, Dos.writeutf (Tf.gettext ());

Version 0.6

The client code is modified as follows:

 PackageCom.swift;Importjava.awt.BorderLayout;ImportJava.awt.Color;Importjava.awt.event.ActionEvent;ImportJava.awt.event.ActionListener;ImportJava.awt.event.WindowAdapter;Importjava.awt.event.WindowEvent;ImportJava.io.DataOutputStream;Importjava.io.IOException;ImportJava.net.Socket;Importjava.net.UnknownHostException;ImportJavax.swing.JButton;ImportJavax.swing.JFrame;ImportJavax.swing.JLabel;ImportJavax.swing.JPanel;ImportJavax.swing.JScrollPane;ImportJavax.swing.JTextArea;ImportJavax.swing.JTextField; Public classChatclientframeextendsJFrame {Private Static Final LongSerialversionuid = -118470059355655240l; Socket s=NULL; DataOutputStream dos=NULL; JLabel Label_shang=NewJLabel (); JLabel Label_xia=NewJLabel (); JTextField TF=NewJTextField (38); JTextArea Ta=NewJTextArea (15, 50); JButton Button=NewJButton ();  PublicChatclientframe () {setbounds (200, 200, 500, 400); Settitle ("Client Chat tool--0.6"); //Large layout of the window, divided into three rows and a column, add three panels on the pbasic panel Shang Zhong XiaJPanel pbasic=NewJPanel (); Pbasic.setlayout (NewBorderLayout ());//This layout mode is also not set by defaultSetcontentpane (Pbasic);//Put the Panel on the window, do not remember to use the This keywordJPanel shang=NewJPanel (); JPanel Zhong=NewJPanel (); JPanel Xia=NewJPanel (); //to set the size of the JPanel panelShang.setsize (470, 25); Zhong.setsize (470, 180); Xia.setsize (470, 40);        Pbasic.add (Shang,borderlayout.north);        Pbasic.add (Zhong,borderlayout.center);        Pbasic.add (Xia,borderlayout.south);        Shang.setbackground (color.red);        Zhong.setbackground (Color.yellow);        Xia.setbackground (Color.Blue); Label_shang.settext ("Chat History");        Shang.add (Label_shang); Ta.setlinewrap (true);//Wrap LineJScrollPane scroll=NewJScrollPane (TA);//increase the scrollbar so that the number of rows is not increasedZhong.add (scroll); Label_xia.settext ("Enter Information");        Xia.add (label_xia,borderlayout.west); /** Added function, Window Listener event, window open when setting cursor focus in tf text field*/         This. Addwindowlistener (NewWindowadapter () {@Override Public voidwindowopened (windowevent e) {tf.requestfocus ();        }        });        Xia.add (Tf,borderlayout.center); Button.settext (Send);        Xia.add (Button,borderlayout.east); Final classSharelistenerImplementsactionlistener{@Override Public voidactionperformed (ActionEvent e) {String Tatext=Ta.gettext (); String Tftext=tf.gettext () + "\ r \ n"; String TfText1=Tf.gettext (); Ta.settext (Tatext+tftext); Tf.settext (""); //when the carriage return or send button is Tftext sent to the server                Try{Dos.writeutf (TFTEXT1);                Dos.flush (); } Catch(IOException E1) {e1.printstacktrace (); }}} Button.addactionlistener (NewSharelistener ()); Tf.addactionlistener (NewSharelistener ()); //Auto-Adjust individual panels with compressionpack ();  This. Addwindowlistener (NewWindowadapter () {@Override Public voidwindowclosing (windowevent e) {disconnect (); System.exit (0);        }        }); SetVisible (true); //Create a form to call the connection server directlyConnect (); }         Public voidConnect () {Try{s=NewSocket ("127.0.0.1", 8888); System.out.println ("Connected!"); DOS=NewDataOutputStream (S.getoutputstream ()); } Catch(unknownhostexception e) {e.printstacktrace (); } Catch(IOException e) {e.printstacktrace (); }    }     Public voidDisconnect () {Try{dos.close ();        S.close (); } Catch(IOException e) {e.printstacktrace (); }    }             Public Static voidMain (string[] args) {NewChatclientframe (); }}

Java Online chat project version 0.6 resolves an exception problem after a client shutdown Dis.readutf () loops through the closed socket