Need help on coding

Question

Hi everyone!
currently i am doing a match making project (networking). my project is almost done, the only problem left is on the clientView side which when either button clicked, it will hang the program if char is input on the age text field. i am only managed to show a "not funny" msg when the input is in negative. hope any kind soul can help mi on the coding which will give an error msg and will not hang the program if a char or float is input on the text field. thks in advance:)
ServerModel.java
import java.net.*;
import java.io.*;
import java.util.*;
public class ServerModel
     public static void main(String[] args)
          new ServerModel();
     ServerView sv = new ServerView();
     public ServerModel()
          try
               ServerSocket ss = new ServerSocket(8000);
               sv.jtaLog.append("Server Started .. waiting for Client\n");
               System.out.println("Server started .. waiting for Client");
               int clientNo = 1;
               while(true)
                    Socket connectToClient = ss.accept();
                    // Print the connected client number on the console
                    System.out.println("Start thread for client " + clientNo);
                    //Create a new thread for connection
                    HandleClient thread = new HandleClient(connectToClient);
                    sv.jtaLog.append("Client "+clientNo+" connected!!!\n");
                    //Start thread
                    thread.start();     
                    // Increment clientNo
          clientNo++;               
          catch(IOException e){
               sv.jtaLog.append("Server started already! \n"+e);
     class HandleClient extends Thread
          private Socket connectToClient;
          public HandleClient(Socket socket)
               connectToClient = socket;
          //Run the thread
          public void run()
               try
                    BufferedReader brFromClient = new BufferedReader(new InputStreamReader(connectToClient.getInputStream()));                    
                    PrintWriter pwToClient = new PrintWriter(connectToClient.getOutputStream(),true);
                    while(true)
                         String btn = brFromClient.readLine();     // read which button clicked
                         if(btn.equals("Register"))
                              // recieve 4 name, age , gender, country from client                              
                              String name = brFromClient.readLine();     
     int age = Integer.parseInt(brFromClient.readLine());//READ LINE FROM CLIENT N ASSIGN TO NAME               
     String gender = brFromClient.readLine();     
     String country = brFromClient.readLine();
     if (age<=0)
     pwToClient.println("Not funny");      
     else {
     sv.jtaLog.append("New customer registered!!\n"+name+"\n"+age+"\n"+gender+"\n"+country+"\n");
     PrintWriter bw = new PrintWriter(new FileWriter("Candidate.txt", true)); //write into text file
     //String success = name+"#"+age+"#"+gender+"#"+country+;
     bw.println(name+"#"+age+"#"+gender+"#"+country);//write on candidate.txt
                         //BufferedReader brFile = new BufferedReader(new FileReader("Candidate.txt"));
                         //String msg0;
                         //while((msg0= brFile.readLine())!=null)
                         //bw.println(success);
                         bw.close();
                         pwToClient.println("Registered successfully!!");
                         }     // end if
                         else {
                              int countFound=0;
                              BufferedReader brFile = new BufferedReader(new FileReader("Candidate.txt"));//READ FROM .TXT
                         int age = Integer.parseInt(brFromClient.readLine());//READ LINE FROM CLIENT N ASSIGN TO NAME
                              String gender = brFromClient.readLine();
                              String country = brFromClient.readLine();
                              String msg1;//ASSIGN TO MSG
                         while((msg1= brFile.readLine())!=null)
                         pwToClient.println("Continue Search");      
                              StringTokenizer st = new StringTokenizer(msg1,"#");
                              String nameT= st.nextToken();//BREAK N ASSIGN
               int ageT= Integer.parseInt(st.nextToken());
               String genderT= st.nextToken();
                    String countryT= st.nextToken();     
                              if((age == ageT) && gender.equals(genderT) && country.equals(countryT))
                         pwToClient.println("Found");     
                         pwToClient.println(nameT);
                         pwToClient.println(ageT);
                         pwToClient.println(genderT);
                         pwToClient.println(countryT);
                         countFound++;
                         sv.jtaLog.append("Customer searching for...\n"+age+"\n"+gender+"\n"+country+"\n");
                         else
                              pwToClient.println("Not Found Yet");
          }// end while
               pwToClient.println("End Search");
               if (countFound==0)
               pwToClient.println("Record Not Found");
               else
               pwToClient.println("Total Records Found: "+countFound);
                         }     // end else
                         }     // end while
               }catch (NumberFormatException e) {}
               catch (IOException ex) {}
clientView.java
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class ClientView extends JApplet
private JLabel jlblName = new JLabel("Name: (For Register only)");
private JLabel jlblAge = new JLabel("Age: ");
private JLabel jlblGender = new JLabel("Gender: ");
private JLabel jlblCountry = new JLabel("Country: ");
private JLabel jlbl = new JLabel("Online Match Make", JLabel.CENTER);
private JComboBox jcboGender = new JComboBox();
private JComboBox jcboCountry = new JComboBox();
private JTextField tfName = new JTextField(6);
private JTextField tfAge = new JTextField(2);
private JTextArea jta = new JTextArea(10,5);
private JButton btnSubmit = new JButton ("Submit");
private JButton btnRegister = new JButton ("Register");
private JButton btnClear = new JButton ("Clear");
private ClientModel cm=new ClientModel();
private String s1 ="F";
private String s2 ="Singapore";
public void init()
     setLayout(new GridLayout(4,1,5,5));
     JPanel jp = new JPanel();
     jp.setLayout(new GridLayout(1,1));
jp.add(jlbl);
JPanel jp1 = new JPanel();
//add(new JLabel("Online Match Make", JLabel.CENTER),BorderLayout.NORTH);
//jp1.add(new JLabel("Online Match Make", JLabel.CENTER),BorderLayout.NORTH);
jp1.setLayout(new GridLayout(4,2,5,5));
jp1.add(jlblName);
jp1.add(tfName);
tfName.setEditable(false);
tfName.setText("");
jp1.add(jlblAge);
jp1.add(tfAge);
jp1.add(jlblGender);
jp1.add(jcboGender);
jcboGender.addItem("F");
     jcboGender.addItem("M");
     jp1.add(jlblCountry);
jp1.add(jcboCountry);
jcboCountry.addItem("Singapore");
     jcboCountry.addItem("Malaysia");
     jcboCountry.addItem("Hong Kong");
     JPanel jp2 = new JPanel();
jp2.setLayout(new GridLayout(1,3,20,20));
jp2.add(btnSubmit);
jp2.add(btnRegister);
jp2.add(btnClear);
JPanel jp3 = new JPanel();
jp3.setLayout(new GridLayout(1,1,10,10));
jp3.add(new JScrollPane(jta));
//jp1.add(jta);
               jlblName.setForeground(Color.RED);
                    jlblAge.setForeground(Color.BLUE);
                    jlblGender.setForeground(Color.BLUE);
                    jlblCountry.setForeground(Color.BLUE);
add(jp);
add(jp1);
add(jp2);
add(jp3);
btnSubmit.addActionListener(new Submit());
btnRegister.addActionListener(new Register());
btnClear.addActionListener(new Clear());
     class Submit implements ActionListener
          public void actionPerformed(ActionEvent e)
          {     // tells the server Submit button is clicked
          String result="";String endOfSearch="";
               cm.sendToServer("Submit");
                         // sends age, gender, country to server
               cm.sendToServer(tfAge.getText());
     cm.sendToServer(s1);
               cm.sendToServer(s2);
               s1= (String)jcboGender.getSelectedItem();
     s2= (String)jcboCountry.getSelectedItem();
               // gets result from server
                    while (true){
                    endOfSearch= cm.getFromServer(); //pwToClient.println("Continue Search");
                    if (endOfSearch.equals("End Search")) break;
                    result= cm.getFromServer();
               if (result.equals("Found"))
                    String name = cm.getFromServer();
                    String age= cm.getFromServer();
                    String gender= cm.getFromServer();
                    String country= cm.getFromServer();
               jta.append("Found"+"\n");
                    jta.append("Name: "+name+"\n");
                    jta.append("Age: "+age+"\n");
                    jta.append("Gender: "+gender+"\n");
                    jta.append("Country: "+country+"\n");
               }//end while
                    jta.append(cm.getFromServer()+"\n");
     }//end of submit
     public class Clear implements ActionListener
               public void actionPerformed(ActionEvent e)
                    /*Clearing TextFields*/
                    tfName.setText("");
                    tfAge.setText("");
                    jta.setText("");
     public class Register implements ActionListener
               public void actionPerformed(ActionEvent e)
               {     // tells the server Register button is clicked
                    jlblName.setForeground(Color.RED);
                    jlblAge.setForeground(Color.RED);
jlblGender.setForeground(Color.RED);
jlblCountry.setForeground(Color.RED);
                    if(tfName.getText().equals(""))
                    tfName.setEditable(true);
                    tfAge.setText("");
                    jta.setText("");
                    jta.append("Pls enter both Name & Age\n");
                    else
                    if (tfAge.getText().equals(""))
                         jta.append("Pls enter age\n");
                    else{
                    cm.sendToServer("Register");
                    // sends name, age, gender, country to server
                    cm.sendToServer(tfName.getText());
                    cm.sendToServer(tfAge.getText());
                    s1= (String)jcboGender.getSelectedItem();
               s2= (String)jcboCountry.getSelectedItem();
          cm.sendToServer(s1);
                    cm.sendToServer(s2);
                    String msg = cm.getFromServer();
                    if (msg.equals("Not funny"))
                         jta.append("Not funny");
                    else{
                    jta.setText("");
                    jta.append("Registered successfully!!");
                    tfName.setText("");
                    tfName.setEditable(false);
                    jlblName.setForeground(Color.RED);
                    jlblAge.setForeground(Color.BLUE);
                    jlblGender.setForeground(Color.BLUE);
                    jlblCountry.setForeground(Color.BLUE);     
Message was edited by:
aces1799

Answer 1

jus shut up if u dont wanna help. i only asked for
the part which i do not know, not the whole
program,OK?!! hope at least some guide from anyone
here, i am in the process of learning not listening
to your nonsense!Yes sir. Problem for you is, that everyone else is probably shutting up too.
Um, good luck with that sir.
P.S. Will it be another 12 hours or so before you come back with another snappy retort?