For example, to add items to it, use the add() method:Example // Import the HashSet class import java.util.HashSet; public class Main { public static void main(String[] args) { HashSet<String> cars = new HashSet
Java.Util Assembly: Mono.Android.dll To be added C# [Android.Runtime.Register("addFirst","(Ljava/lang/Object;)V","GetAddFirst_Ljava_lang_Object_Handler", ApiSince=35)]publicvirtualvoidAddFirst(Java.Lang.Object? e); Parameters e
import java.util.*; public class TestMark_to_win { public static void main(String args[]) { HashSet h = new HashSet(); h.add("1"); h.add("2"); h.add("3"); h.add("4"); System.out.println(h); } }
java.base java.util HashSet Contents ❮ Description Constructor Summary Method Summary Constructor Details HashSet() HashSet(Collection) HashSet(int, float) HashSet(int) Method Details iterator() size() isEmpty() contains(Object) add(E) remove(Object) clear() clone() spliterator() to...
method3(); method4(); }publicstaticvoidmethod1(){ HashSet<String> set=newHashSet<String>(); set.add("abc"); set.add("abc"); set.add("ghi"); System.out.println(set); // } 打印结果:因为唯一性,所以只存储了一个“abc”.
Set集合在调用add方法的时候,add方法会调用元素hashCode方法和equals方法,判断元素是否重复 HashSet存储自定义类型元素 Set集合报错元素原因: 存储的元素(String,Integer,...Student,Person...),必须重写hashCode方法和equals方法 LinkedHashSet集合 java.util.LinkedHashSet集合 extends HashSet集合 ...
1、add(E e) HashSet的确定性,也可以理解为唯一性,是通过HashMap的put方法来保证的,往HashMap中put数据时,如果key是一样的,只会替换key对应的value,不会新插入一条数据。所以往HashSet中add相同的元素没有什么用,这里的相同是通过equals方法保证的,具体的在HashMap中细说。
// TODO Auto-generated method stub HashSet<String> m_book = new HashSet<String>(); // 声明一个对象 // === 【添加】往m_book中添加内容,每个内容一个元素。 m_book.add("1、《Java大全》"); m_book.add("2、《Excel入门》"); m_book....
Methods declared in interface java.util.Set add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, iterator, remove, removeAll, retainAll, size, toArray, toArrayConstructor Details LinkedHashSet public LinkedHashSet(int initialCapacity, float loadFactor) Constructs a new, empty...
addAll( typeInfoSet ); } return this; } origin: aws/aws-sdk-java FluentHashSet.withAll(...) /** * Fluent method to add the elements from the specified collection to this * set. */ public FluentHashSet<E> withAll(Collection<? extends E> c) { super.addAll(c); return this;...