Are Set Iterators Mutable or Immutable?Klaus Kreft
比如api接口返回一个set,不期望调用方不小心去修改了返回结果,破坏结果集,这个时候immutable就派上用场了。另外immutable在多线程并发的时候比较提倡,这样可以减少错误率。至于mutable的,函数式编程里头不建议用。 有用 回复 撰写回答 你尚未登录,登录后可以 和开发者交流问题的细节 关注并接收问题和回答的更新提醒 ...
scala中set的用法 | //immutable不可变,系统默认使用不可变set import scala.collection.immutable //mutable:可变 //import scala.collection.mutable object Test11 { //Set:元素不重复 去重: def main(args: Array[String]): Unit = { //格式 // val set1=Set [Int]() ...
本文整理了Java中org.eclipse.collections.api.set.primitive.MutableLongSet.toImmutable()方法的一些代码示例,展示了MutableLongSet.toImmutable()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台,是从一些精选项目中提取出来的代码,具有较强的参考意义,能在一定程度帮忙到你。MutableLongSet.toImmutab...
//scala.collection中的集合要么是mutalbe的,要么是immutable的 //同时该包中也定义了immutable及mutable集合的接口 A collection in package scala.collection can be either mutable or immutable. For instance, collection.IndexedSeq[T] is a superclass of both collection.immutable.IndexedSeq[T] and collection...
The object must be immutable, or not mutated by any client. Parameters: name - the name value - the value addAttributes void addAttributes(AttributeSet attributes) Creates a new attribute set similar to this one except that it contains the given attributes and values. Parameters: attributes -...
写了一个SetMutableGraph,主要是在ArrayListMutableGraph的基础上用IntAVLTreeSet自动排序,效率应该不错。代码如下: 欢迎搞web数据挖掘的同学一起探讨研究: package edu.dut.wisdom; /* * Copyright (C) 2006-2007 Sebastiano Vigna * * This program is free software; you can redistribute it and/or modify it...
* copying any mutable objects that comprise the internal "deep structure" * of the object being cloned and replacing the references to these * objects with references to the copies. If a class contains only * primitive fields or references to immutable objects, then it is usually ...
1.ImmutableSet.copyOfreturns an immutable empty set if the specified set is empty. 1 2 Set<String>mutableSet=Sets.newHashSet(); ImmutableSet<String>immutableSet=ImmutableSet.copyOf(mutableSet); The method will throw aNullPointerExceptionif the specified set is null, and any changes in the u...
This post will discuss various methods to create an immutable set in Java. Immutable Sets have many advantages over their mutable siblings, like they are thread-safe, more memory-efficient, and can be passed to untrusted libraries without any side effect