I have ArrayList with random Integers. How can I remove from this list one minmum value and maximum value?
List < Integer > theBigList = new ArrayList <> ();
Random theGenerator = new Random();
for (int n = 0; n < 14; n++) {
theBigList.add(theGenerator.nextInt(6) + 1);
};
I used method Colections.max nad minimum but I think it removes all of maximum and minimum values from ArrayList.
Thank you in advance for you help
With streams:
// removes max
theBigList.stream()
.max(Comparator.naturalOrder())
.ifPresent(theBigList::remove);
// removes min
theBigList.stream()
.min(Comparator.naturalOrder())
.ifPresent(theBigList::remove);
Without streams:
// removes max
if(!theBigList.isEmpty()) {
theBigList.remove(Collections.max(theBigList));
}
// removes min
if(!theBigList.isEmpty()) {
theBigList.remove(Collections.min(theBigList));
}
Just do this. The point to remember is that List.remove(int) removes the value at that index where List.remove(object) removes the object.
List<Integer> theBigList = new ArrayList<>(List.of(10,20,30));
if (theBigList.size() >= 2) {
Integer max = Collections.max(theBigList);
Integer min = Collections.min(theBigList);
theBigList.remove(max);
theBigList.remove(min);
}
System.out.println(theBigList);
Prints
[20]
List< Integer > theBigList = new ArrayList<>();
theBigList.remove(
theBigList
.stream()
.mapToInt(v -> v)
.max().orElseThrow(NoSuchElementException::new));
theBigList.remove(
theBigList
.stream()
.mapToInt(v -> v)
.min().orElseThrow(NoSuchElementException::new));
