JVM Tutorials - Herong's Tutorial Examples

∟Memory Management Rules and Tests

This chapter provides tutorial notes and example codes on memory management. Topics include JVM memory management rules; testing the OutOfMemoryError exception; testing the garbage collection process.

Memory Management General Rules

Java Exception: java.lang.OutOfMemoryError

Garbage Collection Process

Conclusions:

• JVM raises OutOfMemoryError exception when the application requires more memory than its given maximum limit.
• JVM's garbage collector automatically collects dead objects to free up used memory.

Table of Contents

 About This Book

 Download and Install Java SE 1.6 Update 2

 java.lang.Runtime Class - The JVM Instance

 java.lang.System Class - The Operating System

 ClassLoader Class - Class Loaders

 Class Class - Class Reflections

 Sun's JVM - Java HotSpot VM

 JRockit JVM 7.0 by BEA Systems

 JRockit JVM 8.0 by BEA Systems

►Memory Management Rules and Tests

 Garbage Collection Tests

 Stack Overflow Tests

 Thread Testing Program and Result

 StringBuffer Testing Program and Result

 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

 References

 PDF Printing Version