Java Language
- Getting started with Java Language
- Top 10 Java Errors with Solutions
- Awesome Book
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- Awesome Course
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- 2D Graphics in Java
- Alternative Collections
- Annotations
- Apache Commons Lang
- AppDynamics and TIBCO BusinessWorks Instrumentation for Easy Integration
- Applets
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- Asserting
- Atomic Types
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- Autoboxing
- Basic Control Structures
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- BigDecimal
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- Bit Manipulation
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- Character encoding
- Choosing Collections
- Class - Java Reflection
- Classes and Objects
- Classloaders
- Collection Factory Methods
- Collections
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- Concurrent Programming (Threads)
- Console I/O
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- Converting to and from Strings
- Creating Images Programmatically
- Currency and Money
- Date Class
- Dates and Time (java.time.*)
- Default Methods
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- Disassembling and Decompiling
- Documenting Java Code
- Dynamic Method Dispatch
- Encapsulation
- Enum Map
- Enum starting with number
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- EnumSet class
- Exceptions and exception handling
- Executor, ExecutorService and Thread pools
- Expressions
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- Fluent Interface
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- Functional Interfaces
- Generating Java Code
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- Immutable Class
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- Inheritance
- InputStreams and OutputStreams
- Installing Java (Standard Edition)
- Interfaces
- Iterator and Iterable
- Java Agents
- Java Compiler - 'javac'
- Java deployment
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- Java Floating Point Operations
- Java Memory Management
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- Java Performance Tuning
- Java Pitfalls - Exception usage
- Java Pitfalls - Language syntax
- Java Pitfalls - Nulls and NullPointerException
- Java Pitfalls - Performance Issues
- Java Pitfalls - Threads and Concurrency
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- Java Virtual Machine (JVM)
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- JSON in Java
- Just in Time (JIT) compiler
- JVM Flags
- -XXaggressive
- -XXallocClearChunks
- -XXallocClearChunkSize
- -XXcallProfiling
- -XXdisableFatSpin
- -XXdisableGCHeuristics
- -XXdumpSize
- -XXexitOnOutOfMemory
- JVM Tool Interface
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- Lists
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- log4j / log4j2
- Logging (java.util.logging)
- Maps
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- Nested and Inner Classes
- Networking
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- Object Class Methods and Constructor
- Object Cloning
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- Oracle Official Code Standard
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- Security & Cryptography
- SecurityManager
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- Streams
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- StringBuilder
- Strings
- sun.misc.Unsafe
- super keyword
- The Classpath
- The Java Command - 'java' and 'javaw'
- The java.util.Objects Class
- ThreadLocal
- TreeMap and TreeSet
- Type Conversion
- Unit Testing
- Using Other Scripting Languages in Java
- Using the static keyword
- Using ThreadPoolExecutor in MultiThreaded applications.
- Varargs (Variable Argument)
- Visibility (controlling access to members of a class)
- WeakHashMap
- XJC
- XML Parsing using the JAXP APIs
- XML XPath Evaluation
- XOM - XML Object Model
Java Language JVM Flags -XXallocClearChunks
Example
This option allows you to clear a TLA for references and values at TLA allocation time and pre-fetch the next chunk. When an integer, a reference, or anything else is declared, it has a default value of 0 or null (depending upon type). At the appropriate time, you will need to clear these references and values to free the memory on the heap so Java can use- or reuse- it. You can do either when the object is allocated or, by using this option, when you request a new TLA.
Usage:
-XXallocClearChunks
-XXallocClearChunks=<true | false>
The above is a boolean option and is generally recommended on IA64 systems; ultimately, its use depends upon the application. If you want to set the size of chunks cleared, combine this option with -XXallocClearChunkSize. If you use this flag but do not specify a boolean value, the default is true.
