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javaperformancememory-efficient
Woot4Moo
Woot4Moo

Reputation: 24316

Space efficient conversion from Wrapper to primitive and primitive to Wrapper

Given the following function: 

public void convertToWrapper(long[] longsToConvert)  
{    

}

and 

public void convertToPrimitive(Long[] longsToConvert)  
{  
}

Apache ArrayUtils exposes the following: 

public Long[] toObject(long[] longs){
    final Long [] result = new Long [array.length];
        for (int i = 0; i < array.length; i++) {
             result[i] = new Long (array[i]);
         }
}

My question is there a way to do this utilizing only one array? I have tried the following which does not work: 

for(int i =0;i<array.length;i++)  
{  
     array[i] = new Long(array[i]);
}

Upvotes: 0

Views: 73

Answers (1)

David Grant
David Grant

Reputation: 14225

No. A Long[] is not the same type as a long[], so assignment will fail.

Upvotes: 5

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