/*
Search elements of LinkedList Java example
This java example shows how to search element of Java LinkedList using indexOf
and lastIndexOf methods.
*/
import java.util.LinkedList;
public class SearchElementLinkedListExample {
public static void main(String[] args) {
//create LinkedList object
LinkedList lList = new LinkedList();
//add elements to LinkedList
lList.add("1");
lList.add("2");
lList.add("3");
lList.add("4");
lList.add("5");
lList.add("2");
/*
* To search first occurrence of an element of LinkedList, use
* int indexOf(Object element) method.
*
* This method returns index of first occurrence of element if found in
* the LinkedList. It returns -1 if element not found.
*/
int index = lList.indexOf("2");
if(index != -1)
{
System.out.println("First occurrence of 2 in LinkedList is at index : " + index);
}
else
{
System.out.println("LinkedList does not contain 2");
}
/*
* To search last occurrence of an element of LinkedList, use
* int lastIndexOf(Object element) method.
*
* This method returns index of last occurrence of element if found in
* the LinkedList. It returns -1 if element not found.
*/
index = lList.lastIndexOf("2");
if(index != -1)
{
System.out.println("Last occurrence of 2 in LinkedList is at index : " + index);
}
else
{
System.out.println("LinkedList does not contain 2");
}
}
}
