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Jul 2, 2023 · Java 10: Introduced features like local variable type inference (var keyword) and the experimental garbage collector (Epsilon), enhancing code conciseness and providing performance testing ...
- Functional Programming
- Streams
- Optional
- JShell
- Factory Methods For Immutable Collections
- Type Inference with var
- Single Source File Launch
- Switch Expression
- Multi-Line Strings
- Data Classes: Record
In Java 8, functional programming and lambdas were added as language features. The two core paradigms of functional programming are immutable values and elevating functions to first class citizens. Data goes through a pipeline of modification steps, where each step takes some input and maps it to a new output. Functional programming can be used wit...
For your average computer program, you often have to work with a list of values and perform a given transformation on each value. Prior to Java 8, you had to use a for loop for this transformation, but from now, you can use Streamsas follows: The mapfunction takes as input a lambda, which will be applied to all elements in the stream. Streams can w...
Another common problem in Java were Null Pointer Exceptions. So, Java introduced Optional– a monad that wraps a reference which might or might not be null. Applying updates to this Optional can be done in a functional way: In the snippet above, we create a random number, wrap it inside an Optional object, and then only print the number if it is eve...
Finally, we have a REPL for Java, and its name is JShell!😊 In a nutshell, JShell allows to experiment with Java snippets without writing and compiling a full Java class. Instead, you can execute one command at a time, and you immediately see the result. Here’s a simple example: Folks familiar with interpreted languages like JavaScript or Python ha...
Simple initialization of Listshas been missing in Java for a long time, but those times are over now. 😅 Previously you had to do something like this: This is now simplified as follows: This fancy of(...) method exists for List, Set and Map. They all create an immutable object in just one simple line of code.
Java 10 introduced the new var keyword which allows to omit the typeof a variable. In the snippet above, the type of x can be inferredto be HashSet by the compiler. This feature helps to reduce boilerplate code and improve readability. There’s some limitations to it though: you can only use varinside of method bodies, and the compiler will infer th...
Previously, when you had written a simple Java program consisting of one file, you had to first compile the file with javac and then run it with java. In Java 11, you can do both steps with one command: Main.java: For simple starter programs or experiments consisting of just one Java class, this feature for launching single source fileswill make yo...
Java 12 brought us Switch expressions. Here’s a quick showcase of how the expression differs from the old switch statement. The old switch statementdefines the flow of the program: In contrast, the new switch expressionreturns a value: To sum up, the old switch statement is for program flow, and the new switch expression resolves to a value. Notice...
Did you ever have to define a long multi-line String like JSON or XML? So far, you’d probably squash everything on one line and use newline characters \n, but this makes the String much harder to read. Here comes Java 13 with multi-line Strings!💪 Sample case: Now, we run the main Method via single-file-launch: The resulting String spans multiple l...
Of all the new features in this article, this is probably the one I’m most excited about: finally, there are data classes in Java! These classes are declared with the recordkeyword and have automatic Getters, a constructor, and equals() method etc. In short, you can get rid of a huge chunk of boilerplate code!🙌🎉 Scala has a similar feature with c...
This guide explores the key features of Java 15, including new garbage collectors, string methods, and experimental features. It also covers performance improvements, deprecations, and other changes in this release.
Jan 16, 2024 · In this article, we'll talk about the news related to the new version of the Java ecosystem, Java SE 17 - the new features and the changes in its release process, LTS support, and licenses.
Jan 11, 2024 · Experimental Java-Based JIT Compiler. Since Java 9, the Graal Compiler (a Java compiler written in Java) has been supplied as an experimental Ahead-of-Time (AOT) compiler. This allows a Java program to be compiled into a native executable file (e.g., an exe file on Windows).
Jan 21, 2024 · Learn the new features in Java 21 LTS, including Virtual Threads, Unnamed classes, Sequenced Collections, Scoped Values, and Record Patterns.
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Feb 15, 2024 · Embark on a concise journey through Java’s transformation from version 8 to 21. Explore the language’s evolution, uncovering key features that have reshaped coding practices and elevated the...
