如何在java中将Applet添加到JPanel [英] how to add a Applet to a JPanel in java

问题描述

我正在做一个项目，但我偶然发现了一个问题，我似乎无法将 Applet 添加到 JPanel.人们一直告诉我它是一个组件，我可以将它添加到 JPanel 中，但它不显示给我.我在这方面遇到了很多麻烦，不胜感激 :)

Hi i am working on a project and i stumbled along a problem where i cannot seem to add a Applet to a JPanel. People kept telling me that it is a component and i can just add it to the JPanel but it isnt displaying for me. I am having a lot of trouble with this and any help is appreciated :).

如果你想要这里的代码(这段代码是例子，不是我的项目):

If you want here is the code (this code is example not my project):

 import java.applet.Applet;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.DataInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLClassLoader;
import java.net.URLConnection;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class Main {

    public static void main(String artgs[]) throws Exception {
        String source = getPageSource(new URL(
                "http://www.runescape.com/game.ws?j=1"));
        Matcher matcher = SOURCE_PATTERN.matcher(source);
        if (matcher.find()) {
            String first = matcher.group(1);
            String frameSource = getPageSource(new URL(first));
            matcher = ARCHIVE_PATTERN.matcher(frameSource);
            Matcher codeMatcher = CODE_PATTERN.matcher(frameSource);
            if (matcher.find() && codeMatcher.find()) {
                RSStub stub = new RSStub(PARAMETER_PATTERN, frameSource);
                URL world = new URL(first.substring(0, first.indexOf("/,")));
                stub.setCodeBase(world);
                stub.setDocumentBase(world);
                String archive = matcher.group(1);
                System.out.println(world.toString() + "/" + archive);
                Download(world.toString() + "/", archive);
                URLClassLoader clazzes = new URLClassLoader(
                        new URL[] { new URL("" + world.toString() + "/"
                                + archive) });
                Class<?> clazz = clazzes.loadClass("Rs2Applet");
                final Applet applet = (Applet) clazz.newInstance();
                final JFrame frame = new JFrame();

                applet.setStub(stub);
                applet.init();
                applet.start();
                frame.addWindowListener(new WindowAdapter() {
                    @Override
                    public void windowClosing(WindowEvent e) {
                        applet.stop();
                        applet.destroy();
                        frame.dispose();
                        frame.setVisible(false);
                    }
                });
                JPanel panel = new JPanel();
                panel.setBackground(Color.black);
                panel.setPreferredSize(new Dimension());
                panel.add(applet);
                frame.add(panel);
                frame.pack();
                frame.setVisible(true);
            }
        }
    }

    private static String getPageSource(URL url) throws IOException,
            InterruptedException {
        URLConnection c = url.openConnection();
        c.addRequestProperty(
                "Accept",
                "text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5"); // /By
                                                                                                                        // wyn10
        c.addRequestProperty("Accept-Charset", "ISO-8859-1,utf-8;q=0.7,*;q=0.7");
        c.addRequestProperty("Accept-Encoding", "gzip,deflate");
        c.addRequestProperty("Accept-Language", "en-gb,en;q=0.5");
        c.addRequestProperty("Connection", "keep-alive");
        c.addRequestProperty("Host", "www.runescape.com");
        c.addRequestProperty("Keep-Alive", "300");
        c.addRequestProperty("User-Agent",
                "Mozilla/5.0 (Windows NT 6.1; rv:9.0.1) Gecko/20100101 Firefox/9.0.1");
        DataInputStream di = new DataInputStream(c.getInputStream());
        byte[] tmp = new byte[c.getContentLength()];
        di.readFully(tmp);
        di.close();
        return new String(tmp);
    }

    public static void Download(String world, String archive) throws Exception {
        URLConnection jarConnection = new URL(world + archive).openConnection();
        FileOutputStream out = new FileOutputStream("./gamepack.jar");
        InputStream input = jarConnection.getInputStream();
        byte[] tmp = new byte[1024];
        int read;
        while ((read = input.read(tmp)) != -1) {
            out.write(tmp, 0, read);
        }
    }

    public static final Pattern SOURCE_PATTERN = Pattern
            .compile("src=\"(.*)\" ");

    public static final Pattern ARCHIVE_PATTERN = Pattern
            .compile("archive=(.*) ");

    public static final Pattern CODE_PATTERN = Pattern.compile("code=(.*) ");

    public static final Pattern PARAMETER_PATTERN = Pattern
            .compile("<param name=\"([^\\s]+)\"\\s+value=\"([^>]*)\">");
}

存根

import java.applet.AppletContext;
import java.applet.AppletStub;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RSStub implements AppletStub {

    private URL documentBase;

    private URL codeBase;

    public void setDocumentBase(URL documentBase) {
        this.documentBase = documentBase;
    }

    public void setCodeBase(URL codeBase) {
        this.codeBase = codeBase;
    }

    public String[] keys = new String[2];

    private Map<String, String> parameters = new HashMap<String, String>();

    public RSStub(Pattern parameterPattern, String frameSource) {

        Matcher param = parameterPattern.matcher(frameSource);
        while (param.find()) {
            String key = param.group(1);
            String value = param.group(2);
            parameters.put(key, value);
            if (key.equals("0") || key.equals("-1")) {
                switch (key) {
                case "0":
                    keys[0] = key;
                case "-1":
                    keys[1] = key;
                }
                System.out.println("\t-> Client Deobfucation Key " + key
                        + " is " + value);
            }
        }
    }

    public String[] getDeobfucationKeys() {
        return keys;
    }

    public URL getDocumentBase() {
        return documentBase;
    }

    public URL getCodeBase() {
        return codeBase;
    }

    public String getParameter(String name) {
        return parameters.get(name);
    }

    public AppletContext getAppletContext() {
        return null;
    }

    public void appletResize(int width, int height) {
    }

    @Override
    public boolean isActive() {
        return true;
    }
}

推荐答案

像 JFrame 和 JDialog 一样，JApplet 是一个 Swing 顶级容器.您或许可以利用此处引用的示例中所示的混合方法.

Like JFrame and JDialog, JApplet is a Swing top-level container. You may be able to leverage the hybrid approach shown in the examples cited here.

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