JVM

This is a question that I was asked during an interview: what does the concurrent mode failure means? It’s really a good question to check your understanding of Concurrent Mark Sweep (CMS) Collector. This post starts with concurrent mode failure and explains the whole steps of one CMS cycle. In a nutshell, The message “concurrent mode failure” signifies that the concurrent collection of the Old Generation did not finish before the Old Generation became full. ...

Today, let’s focus on the class file format, the hardware- and operating system-independent binary format used to represent compiled classes and interfaces. A class file consists of a stream of 8-bit bytes. All 16-bit, 32-bit, and 64-bit quantities are constructed by reading in two, four, and eight consecutive 8-bit bytes, respectively. ...

The Java Classloader, a part of the Java Runtime Environment, dynamically loads Java classes into the Java Virtual Machine. Each Java class must be loaded by a class loader. ...

As a part of JVM Series, this post tries to explore the object model in JVM. ...

When executing a java program, you may simply input in terminal, like: javac HelloWorld.java java HelloWorld Behind these commands, JVM, as the cornerstone of the Java platform, does a lot of work, which are what this blog attempts to figure out. Today, a new series about JVM will be started, and this is the first episode. ...

These two mind maps are drawn for the further exploration of Java and JVM. For Java I try to cover some advanced features ranging from NIO and Thread. As to JVM, few components are covered, of course, I will replenish it at any moment. ...