code: private static void showSystemInformationButtonClicked() {
          String runningJavaVersion = InternalUtilities.getJavaRunningVersionAsString();
          String targetJavaVersion = InternalUtilities.getJavaTargetVersionFromPom();
          String projectVersion = InternalUtilities.getProjectVersionString();
          boolean isBackport = ("1.6".equals(targetJavaVersion));
          String message = "";
          message += "## Current configuration ##";
          message += "\nLGoodDatePicker version: \"LGoodDatePicker ";
          message += (isBackport) ? ("Backport " + projectVersion) : (projectVersion + " (Standard)");
          message += "\".";
          message += "\nJava target version: Java " + targetJavaVersion;
          message += "\nJava running version: " + runningJavaVersion;
          message += "\n\nMinimum Requirements:"
              + "\n\"LGoodDatePicker Standard\" requires Java 1.8 (or above). "
              + "\n\"LGoodDatePicker Backport\" requires Java 1.6 or 1.7.";
          panel.messageTextArea.setText(message);
      }
docs: showSystemInformationButtonClicked, This shows the current system information.