java - Can't return a Object[] casted as String[] - 


  सार्वजनिक स्ट्रिंग [] getAllKeys () {ऑब्जेक्ट [] कुंजियाँ कॉपी = नया ऑब्जेक्ट [keys.size ()]; चाबियाँ कॉपी = कुंजियाँ। ऐरा (); वापसी ((स्ट्रिंग []) कुंजी कॉपी ()); }   
 क्यों यह मुझे Ljava.lang.Object देता है; [Ljava.lang.String ??   
 
 
 के लिए डाली नहीं जा सकती है क्योंकि यह आपके पास ऑब्जेक्ट ऑरेंज और < कोड> वस्तु []  को  स्ट्रिंग []  पर डाली नहीं जा सकती। रिवर्स संभव है इसका कारण  ऑब्जेक्ट   स्ट्रिंग  और  स्ट्रिंग   ऑब्जेक्ट ।  
 यदि आप  < Em>  कुंजी  की  संग्रह   स्ट्रिंग  की सामग्री   है, तो आप  कुंजी का उपयोग कर सकते हैं .toArray (नई स्ट्रिंग [keys.size ()]);   
  सार्वजनिक स्ट्रिंग [] getAllKeys () {रिटर्न कंस। एट्रे (नई स्ट्रिंग [keys.size ()) ); }

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