Find min from ArrayList

[John Cavados]

Land: ID: L1234, Price: 50000€, Description: Artemida Attikis, isForSale? true, Squaremeter 120m2
Flat: ID: FF4234, Price: 120000€, Description: Abelokipoi Athens, isForSale? true, Squaremeter 72m2, Rooms: 2, Floors: 1
House: ID: HC178, Price: 250000€, Description: for sale, isForSale? true, Squaremeter 120m2, Bedrooms: 4
Flat: ID: FL2, Price: 105000€, Description: Patisia Athens, isForSale? false, Squaremeter 70m2, Rooms: 2, Floors: 2
House: ID: H12311, Price: 310000€, Description: for sale, isForSale? true, Squaremeter 180m2, Bedrooms: 5
House: ID: H12621, Price: 280000€, Description: sold, isForSale? false, Squaremeter 200m2, Bedrooms: 5
House: ID: H72621, Price: 210000€, Description: sold, isForSale? false, Squaremeter 110m2, Bedrooms: 3
Land: ID: L1288, Price: 50000€, Description: Artemida Attikis, isForSale? false, Squaremeter 130m2
Land: ID: L1298, Price: 45000€, Description: Artemida Attikis, isForSale? false, Squaremeter 130m2

here is my arraylist.
how can i calculate the cheapest one? (price)

[Rakib Jahin]

You can do this by writing Collections.sort() with some custom Comparator.

Collections.sort(listName, new Comparator<Your_Object>() {
        @Override public int compare(Your_Object o1, Your_Object o2) {
            return o1.price - o2.price;
        }
}); 

I hope this will work fine.

[Michal Plutynski]

Hi,
please tell us if this answer is ok for you, or you want to calculate smallest price for 1 square meter? and then sort collection

[John Cavados]

it's ok. thank you very much

[Campbell Ritchie]

Rakib Jahin wrote:You can do this by writing Collections.sort() with some custom Comparator.
. . .
I hope this will work fine.

I do not think that is a good answer to the question, I am afraid. There is a much simpler way to find a minimum or maximum.

[John Cavados]

Campbell Ritchie wrote:

Rakib Jahin wrote:You can do this by writing Collections.sort() with some custom Comparator.
. . .
I hope this will work fine.

I do not think that is a good answer to the question, I am afraid. There is a much simpler way to find a minimum or maximum.

tell me please.

[Campbell Ritchie]

It is very simple. You iterate the array/collection, and check whether the value is smaller than your current smallest value.
The hardest part is setting an initial guess, which must not be smaller than the final result. You can try a ridiculously large figure, eg this, or set the initial value of min to the first element in the array/collection.
Finding the maximum is very similar.