- const char *state = env->GetStringUTFChars(js_state, 0);
- const char *value = env->GetStringUTFChars(js_value, 0);
- const char *color = env->GetStringUTFChars(js_color, 0);
+ jstring_wrapper state(env, js_state);
+ jstring_wrapper value(env, js_value);
+ jstring_wrapper color(env, js_color);