读取每一个key并放入map private void readObject(java.io.ObjectInputStream s)throws java.io.IOException, ClassNotFoundException {// Read in any hidden serialization magics.defaultReadObject();// Read capacity and verify non-negative.int capacity = s.readInt();if (capacity < 0) {throw new Inval...
privatevoidreadObject(java.io.ObjectInputStream s) throwsjava.io.IOException, ClassNotFoundException { // Read in any hidden serialization magic // 读取流中对应的当前类的非static和非transient的值 s.defaultReadObject(); // Read capacity and verify non-negative. // 读取流中的容量值 intcapacity=s...
Object> map;//底层使用HashMap来保存所有元素,确切说存储在map的key中,并使用transient关键字修饰,防止被序列化//Dummy value to associate with an Object in the backing Map//privatestaticfinalObject PRESENT =newObject();//常量,构造一个虚拟的对象PRESENT,默认为map的value值(HashSet中只需要用到键,而...
HashSet不保证输出的顺序。 例:2.1.1 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); } }...
Returns the number of elements in this set (its cardinality). Spliterator<E>spliterator() Creates alate-bindingandfail-fastSpliteratorover the elements in this set. Methods inherited from class java.util.AbstractSet equals,hashCode,removeAll
A HashSet is a collection of items where every item is unique, and it is found in the java.util package:ExampleGet your own Java Server Create a HashSet object called cars that will store strings: import java.util.HashSet; // Import the HashSet class HashSet<String> cars = new Hash...
对于HashSet而言,它是基于HashMap实现的。HashSet底层采用HashMap来保存元素,因此HashSet底层其实比较简单。
1. 概述 Hash table and linked list implementation of the Set interface, with predictable iteration order. This implementation differs from HashSet in that it maintains a doubly-linked list running t…
Namespace: Java.Util Assembly: Mono.Android.dll Overloads 展開資料表 LinkedHashSet() Constructs a new, empty linked hash set with the default initial capacity (16) and load factor (0. LinkedHashSet(ICollection) Constructs a new linked hash set with the same elements as the specified...
Hash table and linked list implementation of theSetinterface, with predictable iteration order. This implementation differs fromHashSetin that it maintains a doubly-linked list running through all of its entries. This linked list defines the iteration ordering, which is the order in which elements ...