Java Interview Top 72 Questions

No rating yet

Summary

Java Interview Top 72 Questions is a widely circulated online document compiling Java interview questions (commonly in PDF form). It appears mostly in programmer study-material collections, cloud-drive shares, and tech communities and is not a formally published book, so there is no public, verifiable information on its author, publisher, or ISBN. Judging from its title and circulation, it is positioned as a compact, high-frequency interview quick-review guide: it groups the most commonly asked typical Java interview questions into 72 by topic, each with a concise answer or key points, so job seekers can quickly review the knowledge framework in a short time. Because such materials are mostly compiled by individuals or communities and exist in scattered versions, different circulating versions differ in question selection, ordering, and answer detail. This bibliographic entry describes it cautiously based only on its common name and the general structure of similar materials and makes no definitive claims about specific question content. Its value lies in "distillation": compressing the vast Java knowledge system into a repeatedly reviewable checklist, helping readers locate weak topics and then dig deeper in textbooks and official documentation. Note that online interview-question compilations often have outdated answers, imprecise wording, and content disconnected from new JDK features. Use it as a review index and self-test tool rather than the sole source of knowledge; for core topics such as concurrency, JVM, and collections, still verify against authoritative sources and hands-on experiments. For readers preparing for back-end job interviews who are overwhelmed by too much material, such a selected checklist can significantly reduce screening costs.

Editor's review

面试准备最怕两件事：一是资料太多、从哪本看起都不知道；二是看了很多、真被问到却答不完整。《Java面试精选72题》这类资料解决的正是第一个问题——它把 Java 面试的高频考点压缩成一份足够短、一次能过完的清单。72 道题的体量，意味着一个周末就能刷完一轮，非常适合在投简历前的冲刺阶段做“知识体检”：哪一题卡住了，那一块就是接下来要补的重点。它的第二个好处是便于反复。厚教材适合深读，但不适合每隔几天就翻一遍；而这种题目清单式的资料可以做成自测卡，遮住答案先说一遍，说不顺的地方标记出来，第二轮只看标记。需要坦率指出的是，这类网络流传的整理文档普遍缺少严谨的编校流程，部分答案可能停留在较早期的 JDK 版本，或对并发、JVM 等复杂主题给出过度简化的结论。因此我们建议“以题带学”：用题目发现问题，用权威教材、官方文档和实际写代码去解决问题。把这份清单当作地图，而不是终点，它的价值才会被充分放大。

Who it's for

A good fit for

正在准备 Java 后端岗位面试、需要快速梳理高频考点的求职者
有一定 Java 基础，想通过自测找出知识薄弱环节的开发者
计算机相关专业、即将参加校招笔试面试的在校学生
资料太多无从下手，需要一份精简复习清单的转行学习者

Not a good fit for

完全没有 Java 基础、尚未写过项目的零起点读者
希望系统深入掌握 Java 语言与 JVM 原理的读者
需要权威出版级内容、要求答案严格准确的读者

Reading tips

先不看答案通刷一轮，标记答不出的题，形成个人薄弱点清单；第二轮只攻标记题。
每道题都动手写最小示例验证结论，尤其是并发、集合与 JVM 相关题目。
把 72 题按主题归类，与《Java 核心技术》《深入理解 Java 虚拟机》等教材章节对照着读。
面试前一周用口述方式复述答案并计时，训练表达的条理性，而不是默读。

FAQ

这本书有正式的书号和出版社吗？

目前没有检索到它由正规出版社出版的信息，它在网络上多以 PDF 文档形式流传，属于个人或社区整理的面试资料，因此作者、出版社、ISBN 等字段无法核实，本页相应位置留空。

不同版本内容一样吗？

不完全一样。这类整理资料版本分散，题目取舍、顺序和答案详略常因整理者不同而有差异，建议以自己拿到的版本为准，并对关键结论进行验证。

零基础可以直接用它学 Java 吗？

不建议。它是面试导向的速览清单，假定读者已具备语法与项目基础。零基础读者应先系统学完语言基础并动手做项目，再用它做复习与自测。

题目答案可以完全照背吗？

不建议照背。部分网络资料答案可能滞后于新版 JDK，面试官也常追问细节。应以官方文档和实际验证为准，理解原理后再组织自己的表述。

Comments

Find this book

This site is an index: you start “Search all sources” in your browser, and the entries it lists all point to third-party sites; please judge their availability yourself.

About the author

Anonymous Author

Anonymous is not a real personal name but a general Chinese designation for authors whose names are unknown, lost, or unsigned. Neither nationality nor dates of birth and death can be verified, and available public information is limited, so the works attributed to this name are the only basis for description. The collection holds 2,078 works under Anonymous, spanning medicine, classics, historical readings, ancient poetry, classical literature, and philosophy. Representative works include The Yellow Emperor's Inner Canon: Lingshu, Mencius, The Book of Documents, Nineteen Old Poems, Complete Song Ci, and The Peacock Flies Southeast. Most of these works took shape through long transmission and editing, emerging either from collective folk creation or from authors whose names were lost over time. In ancient China, the Book of Songs, the Great Learning, and many popular storybooks and plays were signed Anonymous because their authors could not be traced. Anonymous works cross the classics, histories, philosophical writings, medical texts, and poetry; their subjects are broad, and their styles vary from archaic simplicity to clear naturalness, making them important and influential sources for understanding ancient Chinese thought, medicine, and literature.