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Gopi Gorantala

I'm Gopi — 15+ years in Java, building Kafka and Flink platforms for banks, where one lost event is a financial discrepancy. I write javahandbook.com because the guides I needed didn't exist. Everything here is tested against a real cluster first.

A deep dive into Java Streams API with examples

Let us deep-dive into Streams API and know how they function. Stream Phases A Java Stream is composed of 3 main phases. 1. Source 2. Intermediate operations 3. Terminal operations Source: Data is collected from a collection. We usually call it Stream source, for example: * List * Map * Set * Array,

A deep dive into Java Streams API with examples

Creating Your First Java Application With IntelliJ IDEA

Creating a Java application is easy using the IntelliJ IDEA IDE tool.

Creating Your First Java Application With IntelliJ IDEA
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How Does Streams API Work?

In this lesson, you will learn everything you need to understand what are streams. and how they actually process data.

Java Comments

Comments are a way to write notes for our code snippets, and a way to explain how the function/class works.

Java Primitive and Non-primitive Data Types

In this lesson, you will learn about the data types available in Java.

Java Variables and Data Types

This is an introductory lesson on variables or different data types available in Java.

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What is Consumer Interface in Java?

This lesson talks about the first functional interface, which is the Consumer.

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A Detailed Guide On Java Built-In Functional Interfaces

This lesson details about the various functional interfaces that fall under major 4 categories.

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What Are Functional Interfaces in Java? With Examples

This is the introductory lesson on functional interfaces. Introduced in Java SE 8, these are powerful and most useful as either lambdas or method reference can use it.

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Introduction To Array Data Structure

This article is an introductory lesson on array data structure with sketches, memory diagrams, strengths, and weaknesses with examples.