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我有一個Java JApplet，它在eclipse運行時完美運行，但在瀏覽器中消失。 applet在瀏覽器中正常工作，直到只有JButton被按下。在這一點上，應該發生一些事情，但是，在瀏覽器中，除了按鈕顯示它已被按下之外，什麼也沒有發生。這在eclipse運行時不會發生。JApplet在瀏覽器中缺少全部功能
下面是代碼：
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.HeadlessException;
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JTextArea;
import org.bukkit.configuration.ConfigurationSection;
import org.bukkit.configuration.InvalidConfigurationException;
import org.bukkit.configuration.file.YamlConfiguration;
public class OverviewGenerator extends JApplet {
int state = 0;
JTextArea label = new JTextArea();
JButton button = new JButton();
String pluginYML;
YamlConfiguration yml = new YamlConfiguration();
String page;
public ActionListener buttonListener = new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if(state == 0) {
try {
pluginYML = (String) Toolkit.getDefaultToolkit().getSystemClipboard().getData(DataFlavor.stringFlavor);
} catch (HeadlessException e1) {
e1.printStackTrace();
} catch (UnsupportedFlavorException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
try {
yml.loadFromString(pluginYML);
} catch (InvalidConfigurationException e1) {
e1.printStackTrace();
}
state = 1;
}else {
generatePage();
Toolkit toolkit = Toolkit.getDefaultToolkit();
Clipboard clipboard = toolkit.getSystemClipboard();
StringSelection strSel = new StringSelection(page);
clipboard.setContents(strSel, null);
state = 0;
}
refreshComponents();
}
};
/**
*
*/
private static final long serialVersionUID = 3470279389867972761L;
public void init() {
makeGui();
}
private void makeGui() {
label.setWrapStyleWord(true);
label.setLineWrap(true);
label.setBackground(Color.CYAN);
label.setEditable(false);
GridLayout layout = new GridLayout();
layout.setRows(2);
layout.setColumns(1);
getContentPane().setLayout(layout);
refreshComponents();
getContentPane().add(label);
getContentPane().add(button);
button.addActionListener(buttonListener);
}
private void refreshComponents() {
if(state==0) {
label.setText("Copy your plugin.yml into the clipboard then press done!");
button.setText("Done");
}else if(state == 1) {
label.setText("Now press the button to copy your template BukkitDev overview into your clipboard!");
button.setText("Copy");
}
}
private void generatePage() {
page = "";
page += "== "+yml.getString("name")+" ==\n";
if(yml.contains("description")) {
page += "\n//"+yml.getString("description")+"//\n\n\n";
}
if(yml.contains("commands")) {
page += "== Commands ==\n";
for(String command : yml.getConfigurationSection("commands").getKeys(false)) {
page += "\n=== "+command+" ===\n\n";
if(yml.contains("commands."+command+".description")) {
page += "//"+yml.getString("commands."+command+".description")+"//\n";
}
if(yml.contains("commands."+command+".usage")) {
page += "Usage: "+yml.getString("commands."+command+".usage")+"\n";
}
}
page += "\n";
}
if(yml.contains("permissions")) {
YamlConfiguration editedYml = new YamlConfiguration();
try {
editedYml.loadFromString(pluginYML.replace(".", "≠"));
} catch (InvalidConfigurationException e) {
e.printStackTrace();
}
ConfigurationSection permissions = editedYml.getConfigurationSection("permissions");
page += "== Permissions ==\n";
for(String permission : permissions.getKeys(false)) {
page += "\n=== "+permission.replace('≠', '.')+" ===\n\n";
if(editedYml.contains("permissions."+permission+".description")) {
page += "//"+editedYml.getString("permissions."+permission+".description").replace('≠', '.')+"//\n";
}
}
page += "\n\n\n";
}
page += "//Got any suggestions?//";
}
}
上面的代碼稍微過時的，我已經在「後調用」代碼加入吧！我在展示Java控制檯時遇到了麻煩，但我相信錯誤可能是在剪貼板被訪問時。
控制檯是否提到了有關查找'org.bukkit.configuration'類的問題？ – trashgod
@trashgod 如何在瀏覽器中查看控制檯？我之前找不到類的錯誤，但後來我修改了html。 – Hoolean
因爲我真的沒有** org.bukkit.configuration **包，所以我不能測試這個。儘管查看代碼後的第一件事是，您從來沒有在EDT上調用過您的代碼 - 事件調度線程，這可能是您所指的內容的原因。請把'init（）'方法的內容，即'makeGui（）'放在'SwingUtilities.invokeLater（new Runnable（）{makeGui（）}）;'內，這樣可以爲你解決問題。有關更多信息，請參閱此[Java文檔]（http://docs.oracle.com/javase/tutorial/uiswing/components/applet.html#thread） –