在Java并发编程的世界里，synchronized是一块绕不开的“基石”——它像一把“互斥锁”，守护着共享资源免受多线程“争抢”的伤害；又似一道“安全屏障”，将竞态条件、数据不一致等线程安全问题隔绝在外。然而，很多开发者对synchronized的认知停留在“加锁语法糖”层面，实践中频频踩坑： ...

Creating simple data classes in Java traditionally required substantial boilerplate code. Consider how we would represent Java’s mascots, Duke and Juggy: public class JavaMascot { private final String ...

Community driven content discussing all aspects of software development from DevOps to design patterns. There are two ways to implement the Java Scanner import: explicitly reference the ...

Community driven content discussing all aspects of software development from DevOps to design patterns. The easiest way to garner user input in a Java program is to use the System’s Console class.

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Generics make your code more flexible and easier to read, and they help you avoid ClassCastExceptions at runtime. Get started with this introduction to using generics with the Java Collections ...

A monthly overview of things you need to know as an architect or aspiring architect. Unlock the full InfoQ experience by logging in! Stay updated with your favorite authors and topics, engage with ...

VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o. Windows 10.0 java.lang.NullPointerException: getItem(...) must not be null at com.sourcegraph.cody.edit ...

[15:36:39 ERROR]: Packet encoding of packet ID 85 threw (skippable? false) java.lang.NullPointerException: Cannot invoke "it.unimi.dsi.fastutil.objects ...

前段时间公司里来了个新同事，小王，技术底子不错，就是查日志的方式让我看得直挠头。 事情是这样的。 小王刚上线的功能在测试环境报错了，告警第一时间，我正好有空，就想着过去指导一下，顺便展示下老司机的经验。 “找到了！”小王兴奋地说。