public boolean getBoolean(String key) {
        Boolean b = (Boolean) get(key);
        if (b == null) {
            return false;
        }

        return b.booleanValue();
    }
Get a boolean from the settings.
<p>
If the key is not set, then false is returned.

@param key the key of a boolean setting
@return the corresponding value, or false if not set
jme3-core/src/main/java/com/jme3/system/AppSettings.java