java swing 端口连接 测试

你可以使用以下代码来测试Java Swing端口连接：

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Socket;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class PortConnectionTest extends JFrame implements ActionListener {

    private JLabel statusLabel;
    private JTextField hostField;
    private JTextField portField;

    public PortConnectionTest() {
        super("Port Connection Test");

        JPanel inputPanel = new JPanel();
        inputPanel.add(new JLabel("Host:"));
        hostField = new JTextField(20);
        inputPanel.add(hostField);
        inputPanel.add(new JLabel("Port:"));
        portField = new JTextField(5);
        inputPanel.add(portField);
        JButton connectButton = new JButton("Connect");
        connectButton.addActionListener(this);
        inputPanel.add(connectButton);

        statusLabel = new JLabel(" ");
        JPanel statusPanel = new JPanel();
        statusPanel.add(statusLabel);

        add(inputPanel, BorderLayout.NORTH);
        add(statusPanel, BorderLayout.CENTER);

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(400, 100);
        setVisible(true);
    }

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

    @Override
    public void actionPerformed(ActionEvent e) {
        String host = hostField.getText();
        int port = Integer.parseInt(portField.getText());
        try {
            Socket socket = new Socket();
            socket.connect(new InetSocketAddress(host, port), 1000);
            statusLabel.setText("Connected successfully!");
            socket.close();
        } catch (IOException ex) {
            statusLabel.setText("Connection failed!");
        }
    }
}

这个程序创建了一个简单的Swing界面，允许用户输入主机和端口号。当用户点击“连接”按钮时，程序将尝试连接到指定的主机和端口。如果连接成功，标签将显示“连接成功！”；否则，标签将显示“连接失败！”。

你可以使用这个程序来测试你的Java应用程序是否能够成功连接到指定的主机和端口。