Question

我正在创建TCP服务器/客户端系统。目前，我已创建了ConnectionFrame.java个文件，其中包含JFrame个JButton，JTextArea和JTextField。启动我的客户端时，我希望显示此JFrame（因此，当我启动client.jar时，ConnectionFrame也应该执行。

我假设我可以通过将以下行添加到客户端main方法中来完成此操作：

ConnectionFrame cf = new ConnectionFrame();

但没有运气。另一个尝试是写作：

ConnectionFrame.main(argv);

由于某种原因，似乎搞砸了我的原始代码。

编辑：为上下文添加代码

ConnectionFrame：

public class ConnectionFrame extends JFrame implements ActionListener {

    JButton buttonLayout = new JButton("Connect to server");
    JTextField textFieldLayout = new JTextField(1);
    JTextArea consoleOutput = new JTextArea(1,20);

    public void addComponentToPane(Container pane) {

        buttonLayout.addActionListener(this);
        textFieldLayout.setHorizontalAlignment(JTextField.CENTER);
        consoleOutput.setEditable(false);

        pane.add(buttonLayout, BorderLayout.PAGE_START);
        pane.add(textFieldLayout, BorderLayout.CENTER);
        pane.add(consoleOutput, BorderLayout.PAGE_END); 
    }

    public static void ConnectionFrame() {
        ConnectionFrame frame = new ConnectionFrame();
        frame.addComponentToPane(frame.getContentPane());
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setResizable(false);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true); 

    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if("Connect to server".equals(e.getActionCommand())){
            consoleOutput.append("CONSOLE: Triggered");
        }
    }

    public static void main(String[] args) {
        ConnectionFrame();
    }
}

客户：

public class TCPClient {

    public static void main(String argv[]) throws Exception {

        ConnectionFrame cf = new ConnectionFrame();

        String sentence;
        String modifiedSentence;
        BufferedReader inFromUser = new BufferedReader( new InputStreamReader(System.in));
        Socket clientSocket = new Socket("localhost", 54343);
        DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());

        CanvasFrame myFrame = new CanvasFrame();
        myFrame.setVisible(true);
        ArrayList<Point> points = myFrame.location;

        outToServer.writeInt(points.size());

        for(Point p : points)
        {
            outToServer.writeInt(p.x);
            outToServer.writeInt(p.y);
        }

        BufferedReader inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
        sentence = inFromUser.readLine();
        outToServer.writeBytes(sentence + '\n');
        modifiedSentence = inFromServer.readLine();
        System.out.println("FROM SERVER: " + modifiedSentence);
        clientSocket.close();
    }
}

Answer 1

您需要安排event-dispatching thread的创建任务，如下所示：

SwingUtilities.invokeLater(
        new Runnable() {
            public void run() {
                ConnectionFrame();
            }
        }
);

在java 8中它将是：

   SwingUtilities.invokeLater(ConnectionFrame::ConnectionFrame);

从一个单独的类开始一个类

1 个答案: