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...
From above discussion, it is evident that HashSet is very useful collection class in cases where we want to handle duplicate records. It provided predictable performance for basic operations. Drop me your questions related toHashSet in Javain comments. Happy Learning !! Reference: HashSet Java D...
This class implements the Set interface, backed by a hash table (actually a HashMap instance).C# 复制 [Android.Runtime.Register("java/util/HashSet", DoNotGenerateAcw=true)] [Java.Interop.JavaTypeParameters(new System.String[] { "E" })] public class HashSet : Java.Util.AbstractSet, I...
Java LinkedHashSet class extends HashSet and implements Set interface. It is very very similar to HashSet class and offers the predictable iteration order.
import java.util.Scanner; import java.util.Set; public class HashSetDemo { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.print("请输入一个字符串:"); String str = scanner.nextLine(); ...
importjava.util.HashSet;publicclassHashSetExample{publicstaticvoidmain(String[]args){HashSet<String>set=newHashSet<>();// 添加元素set.add("apple");set.add("banana");set.add("apple");// 重复元素// 打印集合内容System.out.println("Elements in HashSet: "+set);// 输出: [banana, apple]...
代码语言:java AI代码解释 packagecom.example.javase.collection;importjava.util.LinkedHashSet;importjava.util.Scanner;/** * @Author ms * @Date 2023-10-22 21:41 */publicclassLinkedHashSetTest{publicstaticvoidmain(String[]args){// 读入文本Scannerscanner=newScanner(System.in);Stringtext=scanner.ne...
↳ java.util.AbstractCollection<E>↳ java.util.AbstractSet<E>↳ java.util.HashSet<E>publicclassHashSet<E>extendsAbstractSet<E>implementsSet<E>, Cloneable, java.io.Serializable { } 3、HashSet源码分析 3.1、属性 staticfinallongserialVersionUID = -5024744406713321676L;//序列化IDprivatetransientHa...
public class HelloWorld {public static void main(String[] args) {HashSet<Object> hashSet = new HashSet<>();Set<Object> synchronizedSet = Collections.synchronizedSet(hashSet);}} 笔记大部分摘录自《Java核心技术卷I》,含有少数本人修改补充痕迹。
hello，大家好！播妞又来给大家分享java干货了！关于HashSet实现去除重复元素。首先，HashSet当中有自己封装了add方法：public boolean add(E e) { return map.put(e, PRESENT)==null; }private transient HashMap<E,Object> map; // Dummy value to associate with an Object in the backing Map用来匹配...