client: added java version and charset info to error report (related to #13121)

Mage.Client/src/main/java/mage/client/dialog/ErrorDialog.java

@@ -5,6 +5,8 @@ import mage.client.util.AppUtil;
 import mage.client.util.GUISizeHelper;
 import mage.util.CardUtil;
 
+import java.nio.charset.Charset;
+
 /**
  * GUI: error dialog with copyable error message
  * // TODO: add game logs and data for game errors (client side info from GameView)
@@ -28,7 +30,10 @@ public class ErrorDialog extends MageDialog {
 
         // add additional info
         String fullError = "Error type: " + fullTitle + "\n"
+                + "\n"
                 + "Client version: " + MageFrame.getInstance().getVersion().toString() + "\n"
+                + "Java version: " + System.getProperty("java.version") + "\n"
+                + "Default charset: " + Charset.defaultCharset() + "\n"
                 + "\n"
                 + errorText;
         this.textError.setText(fullError);
@@ -68,7 +73,8 @@ public class ErrorDialog extends MageDialog {
         AppUtil.openUrlInSystemBrowser(url);
     }
 
-    /** This method is called from within the constructor to
+    /**
+     * This method is called from within the constructor to
      * initialize the form.
      * WARNING: Do NOT modify this code. The content of this method is
      * always regenerated by the Form Editor.