Answers for "reverse the arraylist in java"

5

how to reverse order of arraylist

ArrayList<Integer> arrlist = new ArrayList<Integer>();
//This is how to reverse arrlist's oringinal order.
Collections.reverse(arrlist);

//This is how to sort in a reverse order
 Collections.sort(arrlist, Collections.reverseOrder());
Posted by: Guest on September-06-2020
5

how to reverse a list in java

List<String> stringList = Arrays.asList("A", "B", "C");
    Collections.reverse(stringList);
    assertThat(stringList).containsExactly("C", "B", "A");
Posted by: Guest on March-19-2020
1

Arraylist reverse in java

public static void main(String[] args) {

        ArrayList<Integer>list = new ArrayList<>();
        for(int i = 1; i < 6; i++){ // bu element index degil.
            list.add(i);
        }
        System.out.println(list); // [1, 2, 3, 4, 5]

        for (int i = list.size()-1; i >= 0; i--) {
            int each = list.get(i);  // unboxing
            System.out.print(each + " "); // 5 4 3 2 1
        }
Posted by: Guest on June-04-2021
0

reverse arraylist java recursion

public ArrayList<Object> reverse(ArrayList<Object> arrayList) {
    if(arrayList.size() > 1) {                   
        Object value = arrayList.remove(0);
        reverse(arrayList);
        arrayList.add(value);
    }
    return arrayList;
}
Posted by: Guest on November-11-2020

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