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The lastIndexOf() method of CopyOnWriteArrayList in Java
The lastIndexOf() method returns the index of the last occurrence of the specified element in this list. It returns -1 if this list does not contain the element.
The syntax is as follows
public int lastIndexOf(Object ob)
Here, ob is the element. The return value would be the last index of this element.
To work with CopyOnWriteArrayList class, you need to import the following package
import java.util.concurrent.CopyOnWriteArrayList;
The following is an example to implement CopyOnWriteArrayList class lastIndexOf() method in Java
Example
import java.util.concurrent.CopyOnWriteArrayList; public class Demo { public static void main(String[] args) { CopyOnWriteArrayList<Integer> arrList = new CopyOnWriteArrayList<Integer>(); arrList.add(50); arrList.add(90); arrList.add(500); arrList.add(200); arrList.add(350); arrList.add(500); arrList.add(650); System.out.println("CopyOnWriteArrayList = " + arrList); System.out.println("The last index of element 500 = "+arrList.lastIndexOf(500)); } }
Output
CopyOnWriteArrayList = [50, 90, 500, 200, 350, 500, 650] The last index of element 500 = 5
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