Java Objects Introductionjava.util.Objects 类是 Java 7 引入的一个实用工具类,提供了一些静态方法来操作对象。它主要用于处理对象的空值情况,避免了空指针异常。 Commonly Used Methods equals(Object a, Object b):比较两个对象是否相等,避免了空指针异- 常。 hash(Object... values):计算对象的哈希码,避免了空指 2024-04-15 Java #Java Utils
Java 8 Optional IntroductionOptional 类是 Java 8 引入的一个容器类,用于解决可能存在空值的情况。它提供了一种优雅的方式来处理可能为空的对象,避免了空指针异常。 Commonly Used Methods of(T value):创建一个包含非空对象的 Optional 实例。 ofNullable(T value):创建一个可能为空的 Optional 实例。 isPresent(): 2024-04-15 Java #Java 8
Vocabulary 19 surrogate/ˈsʌrəɡət/ For some people, reading travel books is a surrogate for actual travel. 对某些人来说,读游记可以替代真正的旅行。 Because she had no children of her own, her friend’s son became a kind of su 2024-04-01 English #Vocabulary
Vocabulary 18 autistic/ɑːˈtɪs.tɪk/ 自闭症的 One child in 5,000 is autistic. 每 5,000 名儿童中就有一名自闭症患者。 The story is told from the viewpoint of an autistic child. 这个故事以一个自闭症儿童的视角讲述。 She was diagnosed as autistic 2024-04-01 English #Vocabulary
Vocabulary 17 availability/əˌveɪ.ləˈbɪl.ə.t̬i/ 可用性 The ready availability of guns has contributed to the escalating violence. 人们太容易弄到枪支,这也成了暴力事件激增的一个诱因。 Abortion rates are high because the availability o 2024-04-01 English #Vocabulary
Vocabulary 16 lightweight 轻量的 Carrying the lightweight backpack made hiking much more enjoyable and less tiring. privilege (特定个体或群体的)特权,特别待遇 Healthcare should be a right, not a privilege. 医疗保健应该是权利,而非特权。 Senior m 2024-04-01 English #Vocabulary
Vocabulary 15 housing demolition/ˌdem.əˈlɪʃ.ən/ and relocation 拆迁 Housing demolition and relocation is a way to get rich quickly. slang/slæŋ/ 俚语 “Chicken” is slang for someone who isn’t very b 2024-04-01 English #Vocabulary
Vocabulary 14 fast | quick | rapid | speedy | swift 快的;迅速的;敏捷的 fast cars 速度快的汽车 a fast swimmer 速度快的游泳者 Computers are getting faster all the time. 计算机的速度在不断提升。 It’s not a relaxing movie - it’s pretty fast and furio 2024-04-01 English #Vocabulary