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GC Overhead Limit Exceeded

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Hello. In this tutorial, we will understand the GC Overhead Limit Exceeded error in the Java programming language. 1. Introduction Out of memory error in java is a virtual machine error thrown by the java virtual machine when the resources are exhausted. In other words, the error prevails when the virtual machine has spent hours performing the garbage collection but has ...

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Java HTTPS Client

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Hello. In this tutorial, we will make an https client call from java and log the output on the console. 1. Introduction Java8 programming language supports for TLS 1.2 version where TLS defines the transport-level security and is a successor to the SSL (Secure sockets layer) protocol. It is a cryptographic protocol designed to provide secure communication over the computer ...

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How to use Spies in Mockito

Hello. In this tutorial, we will understand Spy in Mockito. As stubbing is now obsolete I will focus @Spy annotation in this tutorial. 1. Introduction Mockito is a popular framework used to mock the interfaces or classes so that dummy functionality can be added during the unit testing. It is a java based library that helps simplify the test-cases development ...

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Convert Hex to/from ASCII in Java

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Hello. In this tutorial, we will explore HEX to/from ASCII conversion in Java. 1. Introduction In order to convert ASCII to hexadecimal values in Java is done in the following steps – Covert the string to the character array Convert each string to an integer Convert each integer value to toHexString() Hex to ASCII conversion in Java is done in ...

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How to find a Bipartite Graph?

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Hello there, in this article we will show how to find if a graph is a Bipartite Graph through detailed examples. 1. Introduction In this article, we will define a bipartite graph, explore the properties of a bipartite graph, document an algorithm used to determine whether a graph is bipartite or not, and implement this algorithm in Java. Finally, we ...

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Top 20 Spring-boot interview questions

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1. Introduction Due to the content of this article, in the first section, I will start with a brief introduction about Spring and Spring-Boot framework, what are these frameworks and where to use them. Millions of developers are using Spring and Spring-Boot widely. 1.1. Spring Firstly, let’s start with a brief introduction to Spring frameworks which is a programming and ...

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Radix Sort in Java

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1. Introduction Sorting algorithms were devised in order to make the ordering of elements of a list or array possible. There are many available to choose from, such as Bubble Sort, Quick Sort, Selection Sort, Heap Sort, Merge Sort, just to name a few. Radix Sort is a sorting algorithm that just happens to be fairly efficient. This article will ...

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Collectors to Map in Java

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1. Introduction The Collectors class is in the java.util.stream package. The Collectors class contains static methods which return a Collector to allow for various reduction operations. This article will discuss the toMap and the toConcurrentMap methods. These methods will return a Map or a ConcurrentMap. In addition, we will also be discussing the SortedMap interface. Finally, we conclude this article ...

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Java 8 CompletableFuture thenRun Example

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Hello. In this tutorial, we will explore the Java 8 CompletableFuture thenRun method. 1. Introduction Before diving deep into the practice stuff let us understand the thenRun(…) method we will be covering in this tutorial. CompletableFuture.thenRun() method does not depend on the previous execution CompletableFuture.thenRun() method does not return anything i.e. CompletableFuture<Void> 2. Practice Let us dive into some practice ...

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Java 8 CompletableFuture thenAccept Example

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Hello. In this tutorial, we will explore the Java 8 CompletableFuture thenAccept method. 1. Introduction Before diving deep into the practice stuff let us understand the thenAccept(…) method we will be covering in this tutorial. CompletableFuture.thenAccept() takes a Consumer and returns CompletableFuture 2. Practice Let us dive into some practice stuff from here and I am assuming that you already ...

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