Search elements of LinkedList Java example
- /*
- 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");
- }
- }
- }
