Java New Features (Java 12, Java 11, Java 10, Java9 & Java8)

Explore how try-with-resources automatically closes resources, preventing memory leaks and reducing boilerplate, as Java 7 introduces implicit resource management and Java 9 adds private resource enhancements.

Master lambda expression rules in Java: curly braces are optional for single-line expressions, mandatory for multi-line or when using return, semicolons are required, and lambdas require a functional interface.

See how the code before Java 8 uses a verbose interface implementation, then replace it with a lambda (an anonymous function) that prints hello.

Learn how a lambda expression works by debugging an anonymous method that prints inside the lambda and returns the sum of two integers, with inputs 100 and 200.

Understand default methods in interfaces, introduced in Java 8, which provide common functionality with a body. Learn how this avoids breaking changes when adding new methods.

Explore chaining Java functions with andThen and compose, where function1 feeds into function2 and the apply method is used, while compose applies the before function first.

Explore the predefined functional interface consumer in Java, showing how it accepts a single input and returns no value, with Java 8 examples and an email demo.

Explore Java stream map and flatMap methods, contrast one-to-one vs one-to-many mappings, and learn applying uppercase, lowercase conversions and string concatenation in examples.

Compare sequential streams and parallel streams by filtering even numbers from a 70,000-integer list and collecting results; parallel streams deliver up to five times the performance of sequential streams.

Learn to retrieve current local time details and create specific dates and times using LocalDate, LocalTime, and LocalDateTime, with examples like 15th August 1947 and 2019 March 5th.

Explore private methods in interfaces from Java 9 onwards to reuse logic and reduce redundancy. A helper generates random numbers used by display methods and isn't visible to implementing classes.

Discover how jlink creates a custom runtime image by including only needed modules, saving memory on small devices. The lecture demonstrates building a Hello module and running it with Java.

Compare pre-Java 11 string checks using length, equals with an empty string, and is empty, and learn how Java 11 introduces is blank for the same outcome.

Demonstrate how Java 11's strip methods replace manual trim logic by removing spaces from both ends, or by using strip leading and strip trailing to target left or right spaces.

Install IntelliJ IDEA 2019 prerelease and configure it for JDK 12 by downloading, installing, and selecting the project structure.

Explore whether java long-term support is provided, using java -version checks to compare versions, and confirm that java 11 offers long-term support.

The G1 garbage collector partitions the Java heap into regions, prioritizing cleanup where garbage accumulates, and divides memory into young and old regions to optimize efficiency.