Re: Using Arrays and Collections

From:
"Danno" <dh.evolutionnext@gmail.com>
Newsgroups:
comp.lang.java.programmer
Date:
20 Mar 2007 13:05:23 -0700
Message-ID:
<1174421123.656590.187950@l75g2000hse.googlegroups.com>
On Mar 20, 2:02 pm, "Danno" <dh.evolutionn...@gmail.com> wrote:

On Mar 20, 1:22 pm, Philipp <sicsic...@freesurf.ch> wrote:

Michael Rauscher wrote:

Eric Sosman schrieb:

Philipp wrote On 03/20/07 14:22,:

Hello,

What's wrong with this code?

int[] intArray = {1,4,3};
int max = Collections.max(Arrays.asList(intArray));


    Arrays.asList() requires an array of object references
and returns a List of object references. An int value is
not an object reference.


Arrays.asList uses a variable length argument list, so it doesn't
require an array. It returns a List<int[]> and since arrays don't
implement the Comparable interface, Collections.max can't be used on
such lists.


Is there a nice way to find the maximum number in an int array then?

Thanks Phil


        List<Integer> myList2 = Arrays.<Integer>asList(1,4,3);
        int max = Collections.<Integer>max(myList2);


BTW..If you want to keep the array, you just need box it to an
Integer...

        Integer[] intArray = {1,4,3};
        List<Integer> myList2 = Arrays.<Integer>asList(intArray);
        int max = Collections.<Integer>max(myList2);
        System.out.println(max);

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