JRL

https://docs.oracle.com/en/java/javase/index.html
https://www.oracle.com/java/technologies/java-ee-glance.html
http://www.cheat-sheets.org/saved-copy/javaEE6ReferenceSheet.pdf
http://www.sws.bfh.ch/~fischli/courses/info/javaee/doc/JavaEE7AnnotationsCheatSheet.pdf
https://jrebel.com/wp-content/uploads/java-collections-cheat-sheet.pdf
https://github.com/BafS/Java8-CheatSheet
https://github.github.com/training-kit/downloads/github-git-cheat-sheet.pdf

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Java 14 New Features

Java SE 14 was released in March 2020. The full list of new features in JDK 14 can be found here: https://openjdk.org/projects/jdk/14/   In this tutorial, we will look over some of these new features and examine some of them. 1. JEP 305: Pattern Matching for instanceof (Preview) With this JEP, instanceof now allows casting of the checked object to a variable. Before Java 14: if (obj instanceof String) { String s = (String) obj; // use s } With Java 14: if (obj instanceof String s) { // can use s here } else { // can't use s here } 2. JEP 345: NUMA-Aware Memory Allocation for G1 This JEP i mproves G1 performance on large machines by implementing NUMA-aware( non-uniform memory access ) memory allocation. Use the  +XX:+UseNUMA option to enable it. 3. JEP 358: Helpful NullPointerExceptions This JEP  improves the usability of  NullPointerException  generated by the JVM by describing precisely which variable was  null . Let's look over the following code which throw
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Pretenders, Contenders and Liars

Life is a way to the uncertainity. This is an exact fact. In this uncertain journey, we meet kinds of people of having different behaviours, and generally label them according to their behaviours. In this writing, i will try to write my understanding of three of these labels; pretenders, contenders and liars. Pretenders A pretender is a kind of people who pretends :) It does not do what it seems to do. It does what it does not seem to do. We frequently meet pretenders in our daily life. And if we catch a person pretending, then we feel that is not sincere. Okay, then here is a question sincerely to ask yourself; do you ever find yourself pretending ? Contenders A contender is a person who has a goal to reach and do not hesitate to fight for that goal. So a contender is sincere ? Absolutely yes, you may be completely opposite to a contender, but if you know that it's a contender, then you know that it's sincere in its behaviours. And sure it is, if you trus
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Java 12 New Features

Java SE 12 was released in March 2019. The full list of new features in JDK 12 can be found here: https://openjdk.org/projects/jdk/12/   In this tutorial, we will look at some of these new features and examine some of them. 1. JEP 189:  Shenandoah: A Low-Pause-Time Garbage Collector (Experimental) Shenandoah is a new garbage collection (GC) algorithm which reduces GC pause times,  independent of heap size. This GC algorithm is experimental so in order to use it with Java 12, you have to enable it : -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC 2. JEP 325:  Switch Expressions (Preview) This JEP extends the switch statement to be used as either a statement or an expression. Meaning that we can now return a value from a switch expression. Before Java 12, we can return a value by assigning it to a variable: String getColor(int num) { String result = ""; switch (number) { case 1, 2, 3: result = "red, green or blue"; break;
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