Java Question Variable from another Class

public class MoPubLibFull extends ViewWrapper<MoPubView> {
   
   /**
    * // Enter your TapForTap API
    */
   
   public void InitialiseTapForTap (BA ba , String TapAPI)
   {
     String [B]TapAPIba[/B] = TapAPI;
   }
}

public class TapForTapBanner extends CustomEventBanner implements com.tapfortap.AdView.AdViewListener {
  private com.tapfortap.AdView tapForTapAdView;
   private CustomEventBannerListener customEventBannerListener;
   
   @Override
   public void loadBanner(Context context, CustomEventBannerListener customEventBannerListener, Map<String, Object> localExtras,
         Map<String, String> serverExtras) {
      this.customEventBannerListener = customEventBannerListener;
      if (tapForTapAdView == null) {
       TapForTap.initialize(context, [B]TapAPIba FROM FIRST CLASS[/B] );
       tapForTapAdView = new com.tapfortap.AdView(context);
       tapForTapAdView.autoRollover = false;
       tapForTapAdView.setListener(this);
      }
      tapForTapAdView.loadAds();
 
   }

package com.mopub.mobileads;

public class Global {

public static String TapAPIba;
}