part 1 chatting softwear for the network on java Client

package javaclientapplaction;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.*;
import java.io.*;
import javax.swing.*;
public class JavaClientClass extends JFrame
{
    JFrame J=new JFrame("Client");
    JButton JB=new JButton("Send");
    JTextField JT=new JTextField(20);
    JTextArea JTA=new JTextArea();
    Socket S=null;
    public void ClientFunction()
    {
      try
      {
        J.setLayout(null);
        S=new Socket("localhost",3333);
        JB.addActionListener(new ActionListener()
        {
                public void actionPerformed(ActionEvent e)
                {
                    try
                    {
                      DataOutputStream D=new DataOutputStream(S.getOutputStream());
                      D.writeUTF(JT.getText());
                    }
                    catch(Exception E)
                    {
                      JOptionPane.showMessageDialog(J, E.getMessage());
                    }
                }
        });
        J.add(JB);
        JB.setBounds(10, 10, 100, 30);
        J.add(JT);
        JT.setBounds(150, 10, 100, 30);
      
        JTA.setBounds(10, 50,250, 250);
        J.add(JTA);
         J.setSize(300,400);
        J.setVisible(true);
      }
      catch(Exception E)
      {
       JOptionPane.showMessageDialog(J, E.getMessage());
      }
    }
    public static void main(String[] args)
    {
        JavaClientClass J1=new JavaClientClass();
        J1.ClientFunction();
    }
}
you have to use two PC for that this is a client side programing you have to set ip fo running this program