Java_Learning/28_ArrayList/IntroArrayList.java at main · TORRYNN/Java_Learning · GitHub

24 lines (20 loc) · 716 Bytes

import java.util.ArrayList;

import java.util.Arrays;

public class IntroArrayList {

public static void main(String[] args) {

ArrayList<Integer> arr = new ArrayList<>();

arr.add(10);

arr.set(1, 22);

System.out.println(arr.indexOf(11));

// size function is used to print the size of arraylist

System.out.println(arr.size());

// Print Reverse of an arrayList

ArrayList<Integer> array = new ArrayList<Integer>(Arrays.asList(1, 2, 3, 4, 5));

for (int i = array.size() - 1; i >= 0; i--) {

System.out.print(array.get(i) + " ");

System.out.print(array. + " ");

}

Expand file tree