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cannot cast Integer to Long

below json data that is coming from the business layer.these values are coming dynamically from db.

when  iterate the json and cast it to Long ,getting classcastexception for value 261031668.

"cannot cast Integer to Long".
{Cluster1=4560722019, Cluster2=8796913840, Cluster3=4562452584, Cluster4=4557194248, Cluster5=261031668}

innerEntry.getValue()...4560722019
innerEntry.getValue()...8796913840
innerEntry.getValue()...4562452584
innerEntry.getValue()...4557194248
innerEntry.getValue()...261031668

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when we get this kind of big range values what is the generic type we need to use for innerMap in this case.as you can see i have taken innerMap<String,Long>.
 
       
      
                for(Entry<String, Long> innerEntry : innerMap.entrySet()) {
                     System.out.println("innerEntry.getValue()..."+innerEntry.getValue());

                    Long sizeObj = (Long)innerEntry.getValue(); //here getting classcastexception for value 261031668

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0
chaitu chaitu
Asked:
chaitu chaitu
1 Solution
 
dpearsonCommented:
If you're going to sometimes receive a Long and sometimes receive an Integer then you can consider using Number:

innerMap<String,Number>

Since Number is a base class for both Integer and Long the assignment will work for both Integer and Longs:

Number sizeObj = (Number)innerEntry.getValue() ;

and then when you wish to extract the values from the map you can use longValue() which will be valid for integers and longs:

public long getLongValue(String key) {
   Number lookupValue = innerMap.get(key) ;
   return lookupValue.longValue() ;
}

Doug
0
 
chaitu chaituAuthor Commented:
excellent doug.
0

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