What Is java.lang.ClassLoader Class

This section describes what is java.lang.ClassLoader class - A built-in abstract class that represents ClassLoaders used in JRE to load dynamically Java classes into the JVM.

What Is java.lang.ClassLoader Class? ClassLoader is a built-in abstract class that represents ClassLoaders used in Java Runtime Environment (JRE) to load dynamically Java classes into the Java Virtual Machine (JVM).

If you want to create your own ClassLoader to your own classes in some special ways, you should define a concrete subclass of java.lang.ClassLoader.

java.lang.ClassLoader class offers these main methods:

Last update: 2014.

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

 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

 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 Outdated Tutorials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