In this example we shall show you how to remove an ArrayList‘s elements using the elements index. To remove an element from an ArrayList using its index one should perform the following steps:
- Create a new ArrayList.
- Populate the arrayList with elements, using
add(E e)API method of ArrayList. - Remove an element from the arrayList, using a specified index, using
remove(int index)API method of ArrayList. The method removes the element with the specific index from the arrayList and returns an Object that is a reference to the element that was removed,
as described in the code snippet below.
package com.javacodegeeks.snippets.core;
import java.util.ArrayList;
public class RemoveElementFromArrayListIndex {
public static void main(String[] args) {
// Create an ArrayList and populate it with elements
ArrayList arrayList = new ArrayList();
arrayList.add("element_1");
arrayList.add("element_2");
arrayList.add("element_3");
/*
To remove an element from the specified index of ArrayList use
Object remove(int index) method.
The method returns a reference to the element that was removed.
*/
Object obj = arrayList.remove(2);
System.out.println(obj + " is removed from ArrayList");
System.out.println("Elements in ArrayList :");
for(int i=0; i < arrayList.size(); i++)
System.out.println(arrayList.get(i));
}
}
Output:
element_3 is removed from ArrayList
Elements in ArrayList :
element_1
element_2
This was an example of how to remove an ArrayList's elements using index in Java.
