如何在 swing JButton 下使用 java class？

Question

如何在 swing jButton 下使用 java class？这是我想要 link 按钮的代码。此代码将发现蓝牙设备并将文本文件发送到已连接的 device.I have used bluecove 库。

import java.io.OutputStream;
import java.util.ArrayList;

import javax.bluetooth.DataElement;
import javax.bluetooth.DeviceClass;
import javax.bluetooth.DiscoveryAgent;
import javax.bluetooth.DiscoveryListener;
import javax.bluetooth.LocalDevice;
import javax.bluetooth.RemoteDevice;
import javax.bluetooth.ServiceRecord;
import javax.bluetooth.UUID;
import javax.microedition.io.Connector;
import javax.obex.ClientSession;
import javax.obex.HeaderSet;
import javax.obex.Operation;
import javax.obex.ResponseCodes;


public class MyDiscoveryListener implements DiscoveryListener{

private static Object lock=new Object();
public ArrayList<RemoteDevice> devices;

public MyDiscoveryListener() {
    devices = new ArrayList<RemoteDevice>();
}

public static void main(String[] args) {

    MyDiscoveryListener listener =  new MyDiscoveryListener();

    try{
        LocalDevice localDevice = LocalDevice.getLocalDevice();
        DiscoveryAgent agent = localDevice.getDiscoveryAgent();
        agent.startInquiry(DiscoveryAgent.GIAC, listener);

        try {
            synchronized(lock){
                lock.wait();
            }
        }
        catch (InterruptedException e) {
            e.printStackTrace();
            return;
        }


        System.out.println("Device Inquiry Completed. ");


        UUID[] uuidSet = new UUID[1];
        uuidSet[0]=new UUID(0x1105); //OBEX Object Push service

        int[] attrIDs =  new int[] {
                0x0100 // Service name
        };

        for (RemoteDevice device : listener.devices) {
            agent.searchServices(
                    attrIDs,uuidSet,device,listener);


            try {
                synchronized(lock){
                    lock.wait();
                }
            }
            catch (InterruptedException e) {
                e.printStackTrace();
                return;
            }


            System.out.println("Service search finished.");
        }

    } catch (Exception e) {
        e.printStackTrace();
    }
}



@Override
public void deviceDiscovered(RemoteDevice btDevice, DeviceClass arg1) {
    String name;
    try {
        name = btDevice.getFriendlyName(false);
    } catch (Exception e) {
        name = btDevice.getBluetoothAddress();
    }

    devices.add(btDevice);
    System.out.println("device found: " + name);

}

@Override
public void inquiryCompleted(int arg0) {
    synchronized(lock){
        lock.notify();
    }
}

@Override
public void serviceSearchCompleted(int arg0, int arg1) {
    synchronized (lock) {
        lock.notify();
    }
}

@Override
public void servicesDiscovered(int transID, ServiceRecord[] servRecord) {
    for (int i = 0; i < servRecord.length; i++) {
        String url = servRecord[i].getConnectionURL(ServiceRecord.AUTHENTICATE_NOENCRYPT, true);
        if (url == null) {
            continue;
        }
        DataElement serviceName = servRecord[i].getAttributeValue(0x0100);
        if (serviceName != null) {
            System.out.println("service " + serviceName.getValue() + " found " + url);
            sendMessageToDevice(url);
            if(serviceName.getValue().equals("OBEX Object Push")){
                sendMessageToDevice(url);                
            }
        } else {
            System.out.println("service found " + url);
        }


    }
}

private static void sendMessageToDevice(String serverURL){
    try{
        System.out.println("Connecting to " + serverURL);

        ClientSession clientSession = (ClientSession) Connector.open(serverURL);
        System.out.println(clientSession.toString());
        HeaderSet hsConnectReply = clientSession.connect(null);
        System.out.println("Reply: " + hsConnectReply.toString());
        if (hsConnectReply.getResponseCode() != ResponseCodes.OBEX_HTTP_OK) {
            System.out.println("Failed to connect");
            return;
        }

        HeaderSet hsOperation = clientSession.createHeaderSet();
        hsOperation.setHeader(HeaderSet.NAME, "do u want to encrypt/decrypt");
        hsOperation.setHeader(HeaderSet.TYPE, "text");

        System.out.println("Operation: " + hsOperation.toString());
        //Create PUT Operation
        Operation putOperation = clientSession.put(hsOperation);
        System.out.println("Putt  Operation: " + putOperation.toString());
        // Send some text to server
        byte data[] = "Hello World !!!".getBytes("iso-8859-1");
        hsOperation.setHeader(hsOperation.LENGTH, new Long(data.length));
        OutputStream os = putOperation.openOutputStream();
        System.out.println("Writing the data: " + data[0]);
        os.write(data);
        os.close();

        putOperation.close();

        clientSession.disconnect(null);

        clientSession.close();
    }
    catch (Exception e) {
        e.printStackTrace();
    }
}

}

Answer 1

你 link Java。相反，您创建一个实现 ActionListener 接口的对象。

喜欢这个 tutorial 直接在 Oracle。

总的来说：如果您对 Java 的了解真的那么少 - 请考虑先了解这些基础，然后再做其他事情。特别是 "UI" 相关的 Java 编码不容易通过反复试验来学习。您应该退后一步，认真研究 learning/understanding 相关概念！

Answer 2

如果您想要创建一个 Java 应用程序，其中包含一个执行 MyDiscoveryListener class 功能的按钮（例如调用 searchForServices 方法），您可以这样做：

import javax.swing.*;

public class BluetoothButton {
    public static void main(String[] arguments) {
        SwingUtilities.invokeLater(() -> new BluetoothButton().createAndShowGui());
    }

    private void createAndShowGui() {
        JFrame frame = new JFrame("Stack Overflow");
        frame.setBounds(100, 100, 800, 600);
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        JButton button = new JButton("Search for services");

        button.addActionListener(actionEvent -> {
            MyDiscoveryListener listener =  new MyDiscoveryListener();
            listener.searchForServices();
        });

        frame.getContentPane().add(button);

        frame.setVisible(true);
    }
}

如何在 swing JButton 下使用 java class？

How can i use java class under swing JButton?

java

swing

bluetooth

bluecove