JAVA

how to make an arraylist java

ArrayList<Integer> integerArray = new ArrayList<Integer>();
ArrayList<String> stringArray = new ArrayList<String>();
ArrayList<Double> doubleArray = new ArrayList<Double>();
//... keep replacing what is inside the <> with the appropriate
//data type

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 funcitonality

java arraylist declaration

ArrayList<String> list = new ArrayList<String>();
list.add("A");
list.add("B");
list.add("C");

Syntax of how to create ArrayList in Java

ArrayList<Type> arrayList= new ArrayList<>();

how to create Java ArrayList

// welcome to softhunt.net
import java.util.ArrayList;

class Main {
  public static void main(String[] args){

    // create ArrayList
    ArrayList<String> Websites = new ArrayList<>();

    // Add elements to ArrayList
    Websites.add("Softhunt.net");
    Websites.add("Pythonprogramming.com");
    Websites.add("Tutorial.io");
    System.out.println("ArrayList: " + Websites);
  }
}

How to create an ArrayList

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

how to declare array of arraylist in java

List<List<Individual>> group = new ArrayList<List<Individual>>(4);

how to create arraylist in java

import java.util.ArrayList;
public class ArrayLists {
    public static void main(String[] args) {

        ArrayList<String> cars = new ArrayList<String>();

        cars.add("Volvo");
        cars.add("BMW");
        cars.add("Ford");
        cars.add("Mazda");

        System.out.println(cars); // [Volvo, BMW, Ford, Mazda]
        System.out.println(cars.isEmpty()); // false
        System.out.println(cars.size()); // 4

        cars.remove(0); // removes the element at index 0 (i.e. "Volvo")

        System.out.println();
        System.out.println(cars); // [BMW, Ford, Mazda]
        System.out.println(cars.isEmpty()); // false
        System.out.println(cars.size()); // 3

        cars.remove(1); // removes the element at index 1 (i.e. "Ford")

        System.out.println();
        System.out.println(cars); // [BMW, Mazda]

        cars.add("Mercedes");

        System.out.println();
        System.out.println(cars); // [BMW, Mazda, Mercedes]

        cars.clear();

        System.out.println();
        System.out.println(cars); // []
        System.out.println(cars.isEmpty()); // true
        System.out.println(cars.size()); // 0
  } 
}