personList.add(p); } } ); System.out.println(personList); List 的contains()方法底层实现使用对象的equals方法去比较的,其实重写equals()就好,但重写了equals最好将hashCode也重写了。 可以参见:http://stackoverflow.com/questions/30745048/how-to-
http://stackoverflow.com/questions/29670116/remove-duplicates-from-a-list-of-objects-based-on-property-in-java-8
1. UsingCollection.removeIf()to Remove Duplicates from OriginalList TheremoveIf()method removes all of the elements of this collection that satisfy a specifiedPredicate. Each matching element is removed usingIterator.remove(). If the collection’s iterator does not support removal, then anUnsupportedOp...
Remove duplicates from a List in Java by converting the List into a Set ASetis aCollectionthat cannot contain duplicate elements. When we convert aListinto aSet, all duplicates will be removed. import java.util.*; public class Test { public static void main(String[] args) { List<String> ...
另外还有一个code更简洁的版本出自Programcreek,贴出来给大家参考。http://www.programcreek.com/2014/06/leetcode-remove-duplicates-from-sorted-list-ii-java/ 1publicstaticListNode deleteDuplicates(ListNode head){2ListNode t =newListNode(0);3t.next =head;4ListNode p =t;56while(p.next!=null&& p.next...
(Java) LeetCode 83. Remove Duplicates from Sorted List —— 删除排序链表中的重复元素 Given a sorted linked list, delete all duplicates such that each element appear onlyonce. Example 1: Input: 1->1->2 Output: 1->2 Example 2: Input: 1->1->2->3->3...
4. Remove Duplicates From a List Using Java 8 Lambdas Finally, let’s look at a new solution, using Lambdas in Java 8. We’lluse thedistinct()method from the Stream API,which returns a stream consisting of distinct elements based on the result returned by theequals()method. ...
[LeetCode][Java] Remove Duplicates from Sorted List II,题意:Givenasortedlinkedlist,deleteallnodesthathaveduplicatenumbers,leavingonly distinct numbersfromtheoriginallist.Forexample,Given
Write a Java program to remove duplicates from a given stack. Sample Solution: Java Code: importjava.util.Scanner;importjava.util.HashSet;publicclassStack{privateint[]arr;privateinttop;// Constructor to initialize the stackpublicStack(intsize){arr=newint[size];top=-1;}// Method to push an...
Java 8 examples to count the duplicates in a stream and remove the duplicates from the stream. We will use a List to provide Stream of items.