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Getting started with Java 8 - Part 1

Aditya Agrawal
I
June 25, 2020

Java 8 has been the most awaited and is a major feature release of Java. I have tried to cover some of the features in this blog to help you understand various aspects of Java 8.

What is Java 8???

Java 8 is a revolutionary release of the world #1 development platform. It includes a huge upgrade to java programming model and a coordinated evolution of the JVM, Java Language and Libraries.Let us look through the default methods for interfaces used in Java 8.

Default Methods for Interfaces:-Java 8 enables us to add non-abstract method implementations to the interfaces by utilizing the default keyword.Example - This functionality can reduce a lot of code duplication when more than one code has the same implementation.We can just define it as default and only in case of different implementation override the method.interface A {

   void method1(int a);



   default void method2(int a) {

       //implementation

   }

}Any class that implements this interface may or may not implement method2 and it will automatically pick up this implementation if not overridden.Lambda Expression:-Let's see how sorting a list of strings works in prior versions.List names = Arrays.asList("Waylon", "Justine", "Marcus", "Thalia", "Angela");

Collections.sort(names, new Comparator() {

   @Override

   public int compare(String a, String b) {

       return b.compareTo(a);

   }

});



Now let's see how we can reduce the above code in a more shorter and more readable form by making use of Java 8.Collections.sort(names, (a, b) -> b.compareTo(a)); By: Aditya Agrawal


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