How to really close a JDialog with Java code?

I know setVisible(false),dispose(),but they can't really close a JDialog. When I have the other thread stop, the thread of the JDialog still runs.

And I can't use System.exit(0),because the other thread needs run for a while.

Following the code, I finally resolve the problem by System.exit(0) at the end of the program.

public class CsUpdateCtrl {

/**
 * 升级service
 */
private CsUpdateService service;

private CsUpdateCtrl() {
    this.service = (CsUpdateService) RmiUtil.getBean(RmiUtil.Service.csupdate);
}

private static final Logger log = Logger.getLogger(CsUpdateCtrl.class.getName());

public static void main(String[] args) throws IOException {

    LogUtil.read();

    log.info("进入自动更新系统");

    CsUpdateCtrl ctrl = null;
    try {
        ctrl = new CsUpdateCtrl();
    } catch (Exception e) {
        SwingUtil.lookAndFeel();
        SwingUtil.message("无法连接服务器!");
        log.info("无法连接服务器:" + e.getMessage());
        return;
    }
    ctrl.start(ctrl.service.version());
}

/**
 * 根据版本号判断是否更新,更新完毕则启动程序
 */
private void start(int version) {
    PropertyIO io = new PropertyIO();
    String oldVersion = io.get(PropertyKey.version);
    String serverAddress = io.get(PropertyKey.serverAddress);
    if (oldVersion == null || !oldVersion.equals(String.valueOf(version))) {// 版本号不相等,下载更新程序
        log.info("下载更新…");
        DownLoad download1 = new DownLoad("http://" + serverAddress + "sdxg-csupdate/sdxg-csclient/sdxg-csclient.jar", "sdxg-csclient\\sdxg-csclient.jar");
        Thread t1 = new Thread(download1);
        DownLoad download2 = new DownLoad("http://" + serverAddress + "sdxg-csupdate/sdxg-csclient/lib/sdxg-web.jar", "sdxg-csclient\\lib\\sdxg-web.jar");
        Thread t2 = new Thread(download2);
        t1.start();
        t2.start();
        SwingUtil.lookAndFeel();
        final DownloadView dialog = new DownloadView(new javax.swing.JFrame(), true);
        java.awt.EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                dialog.setVisible(true);
            }
        });
        // 结果判断
        // 若未完成,则不进行下一步
        while(!download1.result.finish() || !download2.result.finish()) {
            // do nothing
        }
        if(download1.result == Result.Complete && download2.result == Result.Complete) {// 更新完成
            // 版本号写入配置文件
            io.write(PropertyKey.version, String.valueOf(version));
            // Nothing is usefull here, include dispose,dispatchEvent and so on
            // 启用应用程序
            log.info("启用应用程序");
            this.runApp();
            System.exit(0);// well, this is usefull
        } else {// 更新失败
            // Nothing is usefull here, include dispose,dispatchEvent and so on
            JOptionPane.showMessageDialog(null, "下载应用程序失败!");
            log.info("下载应用程序失败!");
            System.exit(0);// well, this is usefull
        }
    }else {// 版本号一样
        log.info("启用应用程序");
        this.runApp();
    }
}

/**
 * 运行客户端程序
 */
private void runApp() {
    try {
        Runtime.getRuntime().exec("java -jar " + "sdxg-csclient\\sdxg-csclient.jar");
    } catch (IOException ex) {
        JOptionPane.showMessageDialog(null, "启动应用程序失败!");
        log.info(LogUtil.ex(ex, "启动应用程序失败!"));
    }
}

/**
 * 线程执行的结果
 */
enum Result {
    Complete,
    UnComplete,
    Fail;

    public boolean finish() {
        return this != UnComplete;
    }
}

/**
 * 下载文件
 * @param urlName
 * @param fileName
 * @throws MalformedURLException
 * @throws IOException 
 */
class DownLoad implements Runnable {

    private String urlName;
    private String fileName;

    Result result = Result.UnComplete;

    public DownLoad(String urlName, String fileName) {
        this.urlName = urlName;
        this.fileName = fileName;
    }

    @Override
    public void run() {
        try {
            URL url = new URL(urlName);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            InputStream is = connection.getInputStream();
            BufferedInputStream bis = new BufferedInputStream(is);
            FileOutputStream fos = new FileOutputStream(fileName);
            int n = -1;
            while ((n = bis.read()) != -1) {
                fos.write(n);
            }
            fos.flush();
            fos.close();
            bis.close();
            is.close();
            result = Result.Complete;
        } catch (Exception ex) {
            result = Result.Fail;
        }
    }
}

Answers


Send the JDialog a WindowEvent.WINDOW_CLOSING event using dispatchEvent(), as shown here and here.

Addendum: System.exit() should be used with care, as discussed here and here. In the example below, a second, non-daemon thread completes normally, even if the dialog is closed before its loop exits. See JLS §12.8 Program Exit for details.

import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;

/**
 * @see http://stackoverflow.com/questions/8336161
 * @see http://stackoverflow.com/questions/6163606
 */
public class DialogEventTest extends JDialog {

    public DialogEventTest() {
        this.setLayout(new GridLayout(0, 1));
        this.add(new JLabel("Dialog event test.", JLabel.CENTER));
        this.add(new JButton(new AbstractAction("Close") {

            @Override
            public void actionPerformed(ActionEvent e) {
                DialogEventTest.this.setVisible(false);
                DialogEventTest.this.dispatchEvent(new WindowEvent(
                    DialogEventTest.this, WindowEvent.WINDOW_CLOSING));
            }
        }));
        this.addWindowListener(new WindowAdapter() {

            @Override
            public void windowClosing(WindowEvent e) {
                System.out.println(e.paramString());
            }
        });
    }

    private void display() {
        this.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
        this.pack();
        this.setLocationRelativeTo(null);
        this.setVisible(true);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                new DialogEventTest().display();
            }
        });
        new Thread(new Runnable() {

            @Override
            public void run() {
                System.out.println("Starting…");
                for (int i = 0; i < 5; i++) {
                    try {
                        Thread.sleep(1000);
                        System.out.println((i + 1) + "s. elapsed.");
                    } catch (InterruptedException e) {
                        e.printStackTrace(System.err);
                    }
                }
                System.out.println("Finished.");
            }
        }).start();
    }
}

Need Your Help

Make block of text into a string in swift

string swift text

I am making an app that uses large blocks of text. The text has line breaks and quotation marks in it so I can just copy and paste the text into the editor. Is there a way to make the whole block...

Multilevel Combo box in vb6

vba vb6

I am trying to create a multilevel combobox in vb6 similar to that seen in the attached image. This box will be used to select values and then save same to an access database (any insights into how I

About UNIX Resources Network

Original, collect and organize Developers related documents, information and materials, contains jQuery, Html, CSS, MySQL, .NET, ASP.NET, SQL, objective-c, iPhone, Ruby on Rails, C, SQL Server, Ruby, Arrays, Regex, ASP.NET MVC, WPF, XML, Ajax, DataBase, and so on.