ClassLoader Class - Class Loaders

This chapter provides tutorial notes and example codes on java.lang.ClassLoader class. Topics include JRE class loaders: Bootstrap, Extensions and System Class Loaders; using getSystemClassLoader().loadClass() to load classes explicitly; using 'verbose:class' option to see when and where classes are loaded.

What Is Class Loader

What Is java.lang.ClassLoader Class

Accessing the ClassLoader of a Class

JVM "-verbose:class" Option

loadClass() Method - Loading Classes Explicitly

getSystemResource() Method - Finding Files

Class Loading Problem - JAR Hell

ClassChecker.java - Reports Class Loader

ClassChecker.java - Reports Class Locations

"superclass access check failed" Class Load Error

Class Loading Followed by Class Initialization

Conclusions:

Table of Contents

 About This Book

 JVM (Java Virtual Machine) Specification

 Java HotSpot VM - JVM by Oracle/Sun

 java.lang.Runtime Class - The JVM Instance

 java.lang.System Class - The Operating System

ClassLoader Class - Class Loaders

 Class Class - Class Reflections

 JVM Runtime Data Areas

 JVM Stack, Frame and Stack Overflow

 Thread Testing Program and Result

 CPU Impact of Multi-Thread Applications

 I/O Impact of Multi-Thread Applications

 CDS (Class Data Sharing)

 Micro Benchmark Runner and JVM Options

 Micro Benchmark Tests on "int" Operations

 Micro Benchmark Tests on "long" Operations

 Micro Benchmark Tests in JIT Compilation Mode

 Micro Benchmark Tests on "float" and "double" Operations

 JRockit JVM 28.2.7 by Oracle Corporation

 Outdated Tutorials

 References

 Full Version in PDF/EPUB