在这个例子中，我们将看到如何使用contains()方法检查LinkedList中是否存在特定元素：
public boolean contains(Object o)：如果此列表包含指定的元素，则返回true。更正式地，当且仅当此列表包含至少一个元素e时才返回true（o == null? e == null: o.equals(e)）。
import java.util.LinkedList;public class CheckLinkedList { public static void main(String[] args) { // Creating LinkedList of String Elements LinkedList<String> linkedlist = new LinkedList<String>(); // Populating it with String values linkedlist.add("AA"); linkedlist.add("BB"); linkedlist.add("CC"); linkedlist.add("DD"); linkedlist.add("EE"); // contains() method checks whether the element exists if (linkedlist.contains("CC")) { System.out.println("Element CC is present in List"); } else { System.out.println("List doesn't have element CC"); } //Checking for element FF if (linkedlist.contains("FF")) { System.out.println("Element FF is present in List"); } else { System.out.println("List doesn't have element FF"); } }}
输出：
Element CC is present in ListList doesn't have element FF
