我正在尝试使用 Swing 构建客户端服务器聊天应用程序。
这样，当我启动客户端时，我会发送一条可以在客户端站点接收到的消息，但是当我在服务器站点上按下一个按钮时，它不会打开一个新框架（在我的情况下是这里的错误）。
我该如何解决？任何人都可以建议我其他方式吗？
我的代码是（服务器站点）：
import java.net.*;
import java.io.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.sql.*;
class Cli extends JFrame
{
ServerSocket ss;
Socket soc;
InputStream in;
OutputStream out;
DataInputStream sin;
DataOutputStream sout;
JLabel l1;
JTextField txt1;
JButton addd;
Cli() throws Exception
{
Class.forName("com.mysql.jdbc.Driver");
Connection cn=DriverManager.getConnection("jdbc:mysql://localhost:3306/nirav","root","root");
JPanel pan=new JPanel(new GridLayout(2,1));
ss=new ServerSocket(8888);
//ss.setSOLimit(10000);
l1=new JLabel("waiting for client");
txt1=new JTextField(40);
addd=new JButton("click here to send");
addd.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{ try{
JOptionPane.showMessageDialog(null,"Data is successfully inserted into the database." );
l1.setText("waiting");
Recieve c=new Recieve();
c.setSize(300,300);
c.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
c.setVisible(true);
}catch(Exception e)
{
System.out.println(e.toString());
}
}
});
soc=ss.accept();
in=soc.getInputStream();
out=soc.getOutputStream();
sin=new DataInputStream(in);
sout=new DataOutputStream(out);
String s="";
try{
s=sin.readUTF();
}catch(Exception e)
{
}
l1.setText("client :"+s);
pan.add(l1);
pan.add(txt1);
pan.add(addd);
add(pan);
}
class Recieve extends JFrame
{
JLabel msg;
JTextField t1;
JButton a1;
Recieve() throws Exception
{
JPanel pan=new JPanel(new GridLayout(2,1));
t1=new JTextField(40);
a1=new JButton("click here to send");
//msg=new JLabel("waiting...");
a1.addActionListener(new ActionListener()
{ public void actionPerformed(ActionEvent ae)
{ try{
String s;
String str="Server :";
sout.writeUTF(t1.getText());
//msg.setText(str);
sout.flush();
}catch(Exception e)
{
System.out.println(e.toString());
}
}});
pan.add(t1);
pan.add(a1);
add(pan);
}
}
}
class Server
{
public static void main(String args[]) throws Exception
{
try{
Cli c=new Cli();
c.setSize(300,300);
c.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
c.setVisible(true);
}
catch(Exception e)
{
System.out.println(e.toString());
}
}
}