Example 1: ArrayList add(int index, E element) method in java
import java.util.ArrayList; public class ArrayListAddMethodExample { public static void main(String[] args) { // creating an empty ArrayList with initial capacity ArrayList al = new ArrayList(6); al.add(12); al.add(14); al.add(16); al.add(18); al.add(20); // adding element 15 at fourth position al.add(3, 15); for(Integer number : al) { System.out.println("Number: " + number); } } }
Example 2: java arraylist add
//create ArrayList ArrayList arrayList = new ArrayList(); //add item to ArrayList arrayList.add("item"); //check if ArrayList contains item (returns boolean) System.out.println(arrayList.contains("item")); //remove item from ArrayList arrayList.remove("item");
Example 3: arraylist insert at position
//Insert a value by using arrayName.add(index, value) //Will not remove current element at index. Will simply move all elements to //the right. import java.util.ArrayList; public class main{ public static void main(String[] args){ ArrayList list = new ArrayList(); list.add(0); list.add(1); list.add(2); list.add(3); list.add(4); list.add(5); list.add(0, 100); //enhanced for loop will print all elements of the ArrayList for(int element : list){ System.out.print(list + ", "); } //Expected output: "100, 0, 1, 2, 3, 4, 5, " } }
Example 4: arraylist add method
public void add(int index, E element) // no return value
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