how to convert a collection into an int array
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Posted By:   kannan_Chandran
Posted On:   Monday, November 7, 2005 07:34 AM

class colA_list{ public static void main(String args[]){ ArrayList list=new ArrayList() ; list.add(new Integer(1)); list.add(new Integer(2)); list.add(new Integer(3)); list.add(new Integer(4)); list.add(new Integer(5)); System.out.println("Hai Array"+list); ListIterator itr = list.listIterator(); int [] ii=new int[list.size()]; if(itr.hasNext()){ Integer iP=(Integer)itr.next(); ii=(int [])iP.intValue(); System.out.println("Question "+ii); } } } i got error in this code while i try t o type cast int to an int array    More>>

class colA_list{
public static void main(String args[]){
ArrayList list=new ArrayList() ;
list.add(new Integer(1));
list.add(new Integer(2));
list.add(new Integer(3));
list.add(new Integer(4));
list.add(new Integer(5));
System.out.println("Hai Array"+list);
ListIterator itr = list.listIterator();
int [] ii=new int[list.size()];
if(itr.hasNext()){
Integer iP=(Integer)itr.next();
ii=(int [])iP.intValue();
System.out.println("Question "+ii);
}
}
}
i got error in this code while i try t o type cast int to an int array

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Re: how to convert a collection into an int array

Posted By:   Jani_Kaarela  
Posted On:   Tuesday, November 8, 2005 03:25 AM


Man, you're awesome! But seriously, please, pleasepleaseplease, read the ****ing manual before posting. By learning to use the API docs, you're doing yourself a favour and taking the first step towards becoming an actual coder.



Once you've gotten over the anger I've caused by stating the obvious, check out this method in the API...

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Re: how to convert a collection into an int array

Posted By:   Almagest_FUTT  
Posted On:   Monday, November 7, 2005 07:59 AM

In your unformatted code, you're not trying to convert a Collection to an int[], instead you're casting an Integer object's int value, that is a primitive, to an int[] object.

Apart from being nonsense, this gives you a runtime error. Working as designed.
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