Hackforge Academy

Explanation

Java 17 is a Long-Term Support (LTS) release that provides performance improvements, new language features, enhanced security, and better developer productivity compared to earlier versions like Java 8 or Java 11.

Code:

// Check Java version
java -version

Explanation

Sealed Classes allow developers to control which classes can extend or implement a class. This improves security and maintainability by restricting inheritance.

Code:

public sealed class Shape permits Circle,
 Rectangle {
}

final class Circle extends Shape {}
final class Rectangle extends Shape {}

Explanation

Pattern Matching for switch (Preview feature) simplifies complex conditional logic by allowing type checking directly inside switch statements.

Code:

static String formatter(Object obj) {
    return switch (obj) {
        case Integer i -> "Integer: " + i;
        case String s -> "String: " + s;
        default -> "Unknown type";
    };
}

Explanation

Records (introduced earlier but stabilized for production use) provide a compact syntax for immutable data classes, reducing boilerplate code like getters, constructors, equals, and hashCode.

Code:

public record Student(String name, int age)
 {}

Student s = new Student("Praveen", 25);
System.out.println(s.name());

Explanation

Text Blocks improve readability of multiline strings such as JSON, SQL queries, or HTML content without needing escape characters.

Code:

String json = """
{
  "name": "Praveen",
  "course": "Java 17"
}
""";

Explanation

New macOS Rendering Pipeline improves graphics performance on macOS systems by replacing the older OpenGL pipeline with Metal API support.

Code:

// Internal JVM improvement
 (no code change required)

Explanation

Strong Encapsulation of JDK Internals improves application security by restricting access to internal APIs that were previously accessible in older Java versions.

Code:

// Example: Access to internal APIs
 like sun.misc.* is now restricted

Explanation

Foreign Function and Memory API (Incubator) allows Java programs to interact with native libraries without using JNI, making native integration easier and safer.

Code:

// Example (conceptual usage)
// Access native memory without 
JNI using Foreign Memory API

Explanation

Enhanced Pseudo-Random Number Generators introduce new interfaces and algorithms for generating high-quality random numbers useful in simulations and secure applications.

Code:

RandomGenerator generator = 
RandomGenerator.getDefault();
System.out.println(generator.nextInt());