why does the ui crash

HMCLAPI/src/main/java/org/jackhuang/hellominecraft/logging/Configuration.java

@@ -1,7 +1,7 @@
 /*
  * Hello Minecraft! Launcher.
  * Copyright (C) 2013  huangyuhui <huanghongxun2008@126.com>
- * 
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -28,9 +28,9 @@ import org.jackhuang.hellominecraft.logging.layout.DefaultLayout;
  */
 public class Configuration {
 
-    public ArrayList<IAppender> appenders = new ArrayList<IAppender>();
+    public ArrayList<IAppender> appenders = new ArrayList<>();
 
-    public static Configuration DEFAULT;
+    public static final Configuration DEFAULT;
 
     static {
         DEFAULT = new Configuration();

HMCLAPI/src/main/java/org/jackhuang/hellominecraft/logging/layout/DefaultLayout.java

@@ -1,7 +1,7 @@
 /*
  * Hello Minecraft! Launcher.
  * Copyright (C) 2013  huangyuhui <huanghongxun2008@126.com>
- * 
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -27,11 +27,11 @@ import org.jackhuang.hellominecraft.logging.LogEvent;
  */
 public class DefaultLayout extends AbstractStringLayout {
 
-    private static final SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
+    private static final SimpleDateFormat SDF = new SimpleDateFormat("HH:mm:ss");
 
     @Override
     public String toSerializable(LogEvent event) {
-        return "[" + sdf.format(new Date()) + "] [" + event.threadName + "/" + event.level.name() + "] " + event.message.getFormattedMessage() + "\n";
+        return "[" + SDF.format(new Date()) + "] [" + event.threadName + "/" + event.level.name() + "] " + event.message.getFormattedMessage() + "\n";
     }
 
 }

HMCLAPI/src/main/java/org/jackhuang/hellominecraft/logging/logger/AbstractLogger.java

@@ -1,7 +1,7 @@
 /*
  * Hello Minecraft! Launcher.
  * Copyright (C) 2013  huangyuhui <huanghongxun2008@126.com>
- * 
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -24,7 +24,7 @@ import org.jackhuang.hellominecraft.logging.message.ParameterizedMessageFactory;
 import org.jackhuang.hellominecraft.logging.message.StringFormattedMessage;
 
 public abstract class AbstractLogger
-implements ILogger {
+    implements ILogger {
 
     public static final Class<? extends IMessageFactory> DEFAULT_MESSAGE_FACTORY_CLASS = ParameterizedMessageFactory.class;
 
@@ -52,9 +52,7 @@ implements ILogger {
     private IMessageFactory createDefaultMessageFactory() {
         try {
             return (IMessageFactory) DEFAULT_MESSAGE_FACTORY_CLASS.newInstance();
-        } catch (InstantiationException e) {
-            throw new IllegalStateException(e);
-        } catch (IllegalAccessException e) {
+        } catch (InstantiationException | IllegalAccessException e) {
             throw new IllegalStateException(e);
         }
     }

HMCLAPI/src/main/java/org/jackhuang/hellominecraft/logging/logger/Logger.java

@@ -1,7 +1,7 @@
 /*
  * Hello Minecraft! Launcher.
  * Copyright (C) 2013  huangyuhui <huanghongxun2008@126.com>
- * 
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -38,8 +38,12 @@ public class Logger extends AbstractLogger {
     }
 
     public Logger(String name, IMessageFactory messageFactory, Level defaultLevel) {
+        this(name, Configuration.DEFAULT, messageFactory, defaultLevel);
+    }
+
+    public Logger(String name, Configuration config, IMessageFactory messageFactory, Level defaultLevel) {
         super(name, messageFactory);
-        this.config = new PrivateConfig(Configuration.DEFAULT, this, defaultLevel);
+        this.config = new PrivateConfig(config, this, defaultLevel);
     }
 
     public synchronized void setLevel(Level level) {

HMCLAPI/src/main/java/org/jackhuang/hellominecraft/logging/logger/SimpleLogger.java

@@ -1,7 +1,7 @@
 /*
  * Hello Minecraft! Launcher.
  * Copyright (C) 2013  huangyuhui <huanghongxun2008@126.com>
- * 
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -85,14 +85,14 @@ public class SimpleLogger extends AbstractLogger {
                 dateText = this.dateFormatter.format(now);
             }
             sb.append(dateText);
-            sb.append(' ');
+            sb.append(SPACE);
         }
 
         sb.append(level.toString());
-        sb.append(' ');
+        sb.append(SPACE);
         if ((this.logName != null) && (this.logName.length() > 0)) {
             sb.append(this.logName);
-            sb.append(' ');
+            sb.append(SPACE);
         }
         sb.append(msg.getFormattedMessage());
         Object[] params = msg.getParameters();
@@ -102,7 +102,7 @@ public class SimpleLogger extends AbstractLogger {
         else
             t = throwable;
         if (t != null) {
-            sb.append(' ');
+            sb.append(SPACE);
             ByteArrayOutputStream baos = new ByteArrayOutputStream();
             t.printStackTrace(new PrintStream(baos));
             sb.append(baos.toString());

HMCLAPI/src/main/java/org/jackhuang/hellominecraft/logging/message/ParameterizedMessage.java

@@ -1,7 +1,7 @@
 /*
  * Hello Minecraft! Launcher.
  * Copyright (C) 2013  huangyuhui <huanghongxun2008@126.com>
- * 
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -31,7 +31,7 @@ import java.util.Set;
  * @author huangyuhui
  */
 public class ParameterizedMessage
-implements IMessage {
+    implements IMessage {
 
     public static final String RECURSION_PREFIX = "[...";
     public static final String RECURSION_SUFFIX = "...]";
@@ -203,19 +203,23 @@ implements IMessage {
         boolean isEscaped = false;
         for (int i = 0; i < messagePattern.length(); i++) {
             char curChar = messagePattern.charAt(i);
-            if (curChar == ESCAPE_CHAR)
+            switch (curChar) {
+            case ESCAPE_CHAR:
                 isEscaped = !isEscaped;
-            else if (curChar == DELIM_START) {
+                break;
+            case DELIM_START:
                 if ((!isEscaped)
                     && (i < messagePattern.length() - 1)
                     && (messagePattern.charAt(i + 1) == DELIM_STOP)) {
                     result++;
                     i++;
                 }
-
                 isEscaped = false;
-            } else
+                break;
+            default:
                 isEscaped = false;
+                break;
+            }
         }
         return result;
     }

HMCLAPI/src/main/java/org/jackhuang/hellominecraft/tasks/TaskWindow.java

@@ -48,6 +48,7 @@ public class TaskWindow extends javax.swing.JDialog
 
     private TaskList taskList;
     private final ArrayList<String> failReasons = new ArrayList();
+    private String stackTrace = null, lastStackTrace = null;
 
     /**
      * Creates new form DownloadWindow
@@ -91,7 +92,11 @@ public class TaskWindow extends javax.swing.JDialog
         try {
             taskList.start();
         } catch (Exception e) {
-            HMCLog.warn("Failed to start thread, maybe there're already a taskwindow here.", e);
+            HMCLog.err("Failed to start thread, maybe there're already a taskwindow here.", e);
+            HMCLog.err("There's the stacktrace of the this invoking.");
+            HMCLog.err(stackTrace);
+            HMCLog.err("There's the stacktrace of the last invoking.");
+            HMCLog.err(lastStackTrace);
             MessageBox.Show(C.i18n("taskwindow.no_more_instance"));
             return false;
         }
@@ -300,6 +305,7 @@ public class TaskWindow extends javax.swing.JDialog
         }
 
         public boolean start() {
+            String stacktrace = StrUtils.getStackTrace(new Throwable());
             return SwingUtils.invokeAndWait(() -> {
                 synchronized (INSTANCE) {
                     if (INSTANCE.isVisible())
@@ -307,6 +313,8 @@ public class TaskWindow extends javax.swing.JDialog
                     TaskWindow tw = inst();
                     for (Task t : ll)
                         tw.addTask(t);
+                    tw.lastStackTrace = tw.stackTrace;
+                    tw.stackTrace = stacktrace;
                     return tw.start();
                 }
             });

HMCLAPI/src/main/java/org/jackhuang/hellominecraft/utils/ArrayUtils.java

@@ -1,7 +1,7 @@
 /*
  * Hello Minecraft! Launcher.
  * Copyright (C) 2013  huangyuhui <huanghongxun2008@126.com>
- * 
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -18,6 +18,7 @@
 package org.jackhuang.hellominecraft.utils;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 
@@ -121,4 +122,19 @@ public class ArrayUtils {
         }
         return -1;
     }
+
+    public static <T> boolean equals(T[] a, T[] b) {
+        if (a == null && b == null)
+            return true;
+        if (a == null || b == null)
+            return false;
+        if (a.length != b.length)
+            return false;
+        Arrays.sort(a);
+        Arrays.sort(b);
+        for (int i = 0; i < a.length; i++)
+            if (a[i] == null && b[i] != null || a[i] != null && b[i] == null || !a[i].equals(b[i]))
+                return false;
+        return true;
+    }
 }

HMCLAPI/src/main/java/org/jackhuang/hellominecraft/utils/EventHandler.java

@@ -1,7 +1,7 @@
 /*
  * Hello Minecraft! Launcher.
  * Copyright (C) 2013  huangyuhui <huanghongxun2008@126.com>
- * 
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or

HMCLAPI/src/main/java/org/jackhuang/hellominecraft/utils/MessageBox.java

@@ -1,7 +1,7 @@
 /*
  * Hello Minecraft! Launcher.
  * Copyright (C) 2013  huangyuhui <huanghongxun2008@126.com>
- * 
+ *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
@@ -95,12 +95,12 @@ public class MessageBox {
      */
     public static int Show(String Msg, String Title, int Option) {
         switch (Option) {
-            case YES_NO_OPTION:
-            case YES_NO_CANCEL_OPTION:
-            case OK_CANCEL_OPTION:
-                return SwingUtils.invokeAndWait(() -> JOptionPane.showConfirmDialog(null, Msg, Title, Option - 10));
-            default:
-                SwingUtils.invokeAndWait(() -> JOptionPane.showMessageDialog(null, Msg, Title, Option));
+        case YES_NO_OPTION:
+        case YES_NO_CANCEL_OPTION:
+        case OK_CANCEL_OPTION:
+            return SwingUtils.invokeAndWait(() -> JOptionPane.showConfirmDialog(null, Msg, Title, Option - 10));
+        default:
+            SwingUtils.invokeAndWait(() -> JOptionPane.showMessageDialog(null, Msg, Title, Option));
         }
         return 0;
     }
@@ -127,4 +127,8 @@ public class MessageBox {
     public static int Show(String Msg) {
         return Show(Msg, TITLE, INFORMATION_MESSAGE);
     }
+
+    public static int ShowLocalized(String msg) {
+        return Show(C.i18n(msg));
+    }
 }