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Java Tutorial
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Java Control Statements
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Object Oriented Programming
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Java Built-in Classes
Java File Handling
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Java Error & Exceptions
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Java Multithreading
- Java - Multithreading
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Java Synchronization
- Java - Synchronization
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- Java - Inter-thread Communication
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Java Networking
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- Java - URL Class
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Java Collections
Java Interfaces
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Java Data Structures
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Advanced Java
- Java - Command-Line Arguments
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- Java - Z Garbage Collector (ZGC)
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Java Miscellaneous
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- Java - Serialization
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- Java - Process API Improvements
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- Java - Enhanced @Deprecated Annotation
- Java - CompletableFuture API Improvements
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- Java 8 - New Features
- Java 9 - New Features
- Java 10 - New Features
- Java 11 - New Features
- Java 12 - New Features
- Java 13 - New Features
- Java 14 - New Features
- Java 15 - New Features
- Java 16 - New Features
Java APIs & Frameworks
Java Class References
- Java - Scanner Class
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- Java - TreeMap
- Java - The IdentityHashMap Class
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- Java - LinkedHashSet
- Java - TreeSet
- Java - BitSet Class
- Java - Dictionary
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- Java - Properties
- Java - Collection Interface
- Java - Array Methods
Java Useful Resources
Changes to Garbage Collection in Java 12
Java 12 introduces multiple enhancements to its garbage collection algorithms.
JEP 189 – Shenandoah: A Low-Pause-Time Garbage Collector (Experimental)
An experimental Low-Pause-Time Garbage Collector, Shenandoah is introduced to reduce the GC pause time. It works in parallel with running java threads. This helps to reduce the dependency of GC over heap size and makes it consistent. Now Garbage collection pause time would be similar for 2 MB as well as for 2 GB heap sapce.
Shenandoah is expected to be part of main JAVA release with Java 15.
JEP 346 – Promptly Return Unused Committed Memory
With Java 12, G1 will process java heap space if application is inactive and may release the memory to operating system. This preemtive behavior conserve and free memory.
JEP 344 : Abortable Mixed Collections
With Java 12, G1 efficiency has been improved. Now G1 mixed collections are abortable if they exceed the define pause limit. Now mixed collections are spilt into mandatory and optional. G1 collector can prioritize the mandatory sets to be check the pause time goal.