Fixed #61

HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/core/version/LibraryDownloadInfo.java

@@ -19,6 +19,7 @@ package org.jackhuang.hellominecraft.launcher.core.version;
 
 import org.jackhuang.hellominecraft.launcher.core.download.DownloadType;
 import org.jackhuang.hellominecraft.util.StrUtils;
+import org.jackhuang.hellominecraft.util.system.IOUtils;
 
 /**
  *
@@ -38,7 +39,7 @@ public class LibraryDownloadInfo extends GameDownloadInfo {
             if (path == null)
                 return null;
             else
-                myURL += path.replace('\\', '/');
+                myURL = IOUtils.addURLSeparator(myURL) + path.replace('\\', '/');
         return myURL;
     }
 }

HMCL/src/main/java/org/jackhuang/hellominecraft/launcher/ui/MainPagePanel.java

@@ -354,7 +354,7 @@ public class MainPagePanel extends AnimatedPanel {
         if (l.isLoggedIn())
             l.logOut();
         cl.first(pnlPassword);
-        pnlPassword.repaint();
+        SwingUtilities.invokeLater(this::repaint);
     }//GEN-LAST:event_btnLogoutActionPerformed
 
     private void txtPlayerNameKeyPressed(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_txtPlayerNameKeyPressed

HMCLAPI/src/main/java/org/jackhuang/hellominecraft/util/system/IOUtils.java

@@ -54,6 +54,15 @@ public class IOUtils {
             return path + File.separatorChar;
     }
 
+    public static String addURLSeparator(String path) {
+        if (path == null || path.trim().length() == 0)
+            return "";
+        if (path.charAt(path.length() - 1) == '/')
+            return path;
+        else
+            return path + '/';
+    }
+
     public static boolean isSeparator(char ch) {
         return ch == File.separatorChar || ch == '/' || ch == '\\';
     }

HMCLAPI/src/main/java/org/jackhuang/hellominecraft/util/ui/LogWindow.java

@@ -17,8 +17,6 @@
  */
 package org.jackhuang.hellominecraft.util.ui;
 
-import java.awt.Frame;
-import javax.swing.text.BadLocationException;
 import javax.swing.text.Document;
 import javax.swing.text.SimpleAttributeSet;
 import javax.swing.text.StyleConstants;
@@ -28,7 +26,6 @@ import org.jackhuang.hellominecraft.util.logging.Level;
 import org.jackhuang.hellominecraft.util.func.NonFunction;
 import org.jackhuang.hellominecraft.util.DoubleOutputStream;
 import org.jackhuang.hellominecraft.util.LauncherPrintStream;
-import org.jackhuang.hellominecraft.util.MessageBox;
 import org.jackhuang.hellominecraft.util.Utils;
 
 /**
@@ -254,7 +251,7 @@ public class LogWindow extends javax.swing.JFrame {
         StyleConstants.setForeground(sas, c.COLOR);
         try {
             d.insertString(d.getLength(), status, sas);
-        } catch (BadLocationException ex) {
+        } catch (Exception ex) {
             HMCLog.err("Failed to insert \"" + status + "\" to " + d.getLength(), ex);
         }