Example Depot

java.lang

• Computing Elapsed Time
• Determining When the Application Is About to Exit
• Getting the Size of the Java Memory Heap
• Implementing a Class That Can Be Sorted
• Loading Native Code
• Redirecting Standard Output, and Error
• Terminating the Application
• The Quintessential Java Application

Arrays

• Copying Elements from One Array to Another
• Shifting Elements in an Array

Assertions

• Compiling a Program with Assertions
• Enabling Assertions from the Command Line
• Handling an Assertion Error

Classes

• Determining from Where a Class Was Loaded
• Determining If a Class Object Represents a Class or Interface
• Dynamically Reloading a Modified Class
• Getting a Class Object
• Getting the Name of a Class Object
• Getting the Package of a Class
• Getting the Superclass of a Class Object
• Getting the Superclass of an Object
• Listing the Interfaces That a Class Implements
• Listing the Interfaces That an Interface Extends
• Loading a Class That Is Not on the Classpath

Commands

• Executing a Command
• Reading Output from a Command
• Sending Input to a Command

Numbers

• Converting a String to a Number
• Parsing and Formatting a Number into Binary, Octal, and Hexadecimal

Objects

• Cloning an Object
• Comparing Object Values Using Hash Codes
• Wrapping a Primitive Type in a Wrapper Object

Strings

• Comparing Strings
• Constructing a String
• Converting a Primitive Type Value to a String
• Converting a String to Upper or Lower Case
• Converting Between Unicode and UTF-8
• Determining a Character's Unicode Block
• Determining If a String Contains a Substring
• Determining If a String Is a Legal Java Identifier
• Getting a Substring from a String
• Replacing Characters in a String
• Replacing Substrings in a String
• Searching a String for a Character or a Substring

System Properties

• Getting and Setting the Value of a System Property
• Listing All System Properties
• Setting the Value of a System Property from the Command Line

Threads

• Allowing an Application with Live Threads to Exit
• Creating a Bounded Work Queue [5.0]
• Creating a Thread
• Determining If the Current Thread Is Holding a Synchronized Lock
• Determining When a Thread Has Finished
• Getting the Stack Trace of an Exception
• Implementing an Unbounded Work Queue
• Listing All Running Threads
• Pausing a Thread
• Pausing the Current Thread
• Stopping a Thread
• Using a Thread-Local Variable