how to make an array of arraylists in java
ArrayList<Integer> [] myList = (ArrayList<Integer>[]) new ArrayList[4];how to make an array of arraylists in java
ArrayList<Integer> [] myList = (ArrayList<Integer>[]) new ArrayList[4];arraylist in java
import java.util.ArrayList;
public class ArrayListExample
{
public static void main(String[] args)
{
int num = 14;
// declaring ArrayList with initial size num
ArrayList<Integer> al = new ArrayList<Integer>(num);
// append new element at the end of list
for(int a = 1; a <= num; a++)
{
al.add(a);
}
System.out.println(al);
// remove element at index 7
al.remove(7);
// print ArrayList after deletion
System.out.println(al);
// print elements one by one
for(int a = 0; a < al.size(); a++)
{
System.out.print(al.get(a) + " ");
}
}
}How to create an ArrayList
import java.util.*;
class JavaExample{
public static void main(String args[]){
ArrayList<String> alist=new ArrayList<String>();
alist.add("Steve");
alist.add("Tim");
alist.add("Lucy");
alist.add("Pat");
alist.add("Angela");
alist.add("Tom");
//displaying elements
System.out.println(alist);
//Adding "Steve" at the fourth position
alist.add(3, "Steve");
//displaying elements
System.out.println(alist);
}
}java arraylist declaration
ArrayList<E> yourArray = new ArrayList<E>();
//'E' can be raplaced with any data type or object, or left as
// E if used for general funcitonalityhow to create an array list in java
List<Integer> list = new ArrayList<>();how to declare array of arraylist in java
List<List<Individual>> group = new ArrayList<List<Individual>>(4);Copyright © 2021 Codeinu
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