System Properties and Runtime Object Methods

This chapter provides tutorial notes and tutorial examples on system properties and the Runtime object. Topics include listing all system properties, setting your own properties, accessing the Runtime object, checking free memory, executing OS commands.

JVM and OS System Properties

System.setProperty() - Setting Your Own Properties

Runtime.getRuntime() - Getting the Runtime Object

freeMemory() - Getting JVM Free Memory Information

Calculating Memory Usage of an Array

exec() - Executing Operating System Commands

Conclusion:

Table of Contents

 About This Book

 Installing JDK 1.8 on Windows

 Execution Process, Entry Point, Input and Output

 Primitive Data Types and Literals

 Bits, Bytes, Bitwise and Shift Operations

 Managing Bit Strings in Byte Arrays

 Reference Data Types and Variables

 StringBuffer - The String Buffer Class

System Properties and Runtime Object Methods

 Generic Classes and Parameterized Types

 Generic Methods and Type Inference

 Lambda Expressions and Method References

 Execution Threads and Multi-Threading Java Programs

 ThreadGroup Class and "system" ThreadGroup Tree

 Synchronization Technique and Synchronized Code Blocks

 Deadlock Condition Example Programs

 Garbage Collection and the gc() Method

 Outdated Tutorials

 References

 PDF Printing Version