sorting doesn't want to work

[prime ice]

Hey, @strange veldt!
Please remember to /close this post once your question has been answered!

[olive sparrow]

this one will sort even numbers after odd ones

[vagrant thunder]

you could stream's partitionBy.
pass in your partition criteria
then run a foreach on the list it returned sorting them.
then you can collect the result in a list

[olive sparrow]

what was the list before and what was it after?

[vagrant thunder]

your code runs as expected on my machine

List<Integer> ints = Arrays.asList(5, 8, 4, 7, 3, 1, 2, 9, 6); Collections.sort(ints, (l1, l2) -> { int a = (int) l1; int b = (int) l2; if (a % 2 == 0 && b % 2 != 0) { return 1; } return -1; });

or
`List<Integer> ints = Arrays.asList(5, 8, 4, 7, 3, 1, 2, 9, 6);
Collections.sort(ints, (l1, l2) -> {
return l1%2==0 && l2%2!=0 ? 1 : -1;
});

    System.out.println(ints);`

gives this output

[prime ice]

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[prime ice]

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