Java Streaming API | map operation on streams

Java Streaming API | map operation on streams

  February 14, 2021    Anil Sable

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Hello Friends, Welcome to JavaHotFix Blog. We Continuously add good valuable information about the Java Eco System including cloud, Big Data processing, Functional Programming, and a lot of others. Thank you for visiting our Blog, Hope you will learn and grow in the java echo system.IntroductonJava's Stream interface has map method, which accept Function<T,R> functional lamda. This lamda accept...

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Java Streaming API | Filtering elements from the streams

Java Streaming API | Filtering elements from the streams

  February 13, 2021    Anil Sable

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So, Todays we are going to learn how to filter out the unwanted elements from the Streams of any collection. Let's get Started on It Let's start with a basic example and we can dig deeper to explain it in more detail. In the Below example, I would like to remove all old cars who manufactured 5 years before.Detailed Version Codepublic class JavaStreamingApiFilteringExample { public static void...

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Understanding Internal Working of java.util.HashMap

Understanding Internal Working of java.util.HashMap

  April 18, 2019    Anil Sable

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Hello Friends, Today in this blog we will be exploring the internal working of HashMap collection classes. HashMap is an implementation of the Map interface and allows us to store & retrieve values in the key-value pattern. The internal structure of the Hashmap is...

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Part II : Jackson Mix-ins, De/serializing third party objects with better control

Part II : Jackson Mix-ins, De/serializing third party objects with better control

  April 03, 2019    Anil Sable

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Hello Friends, Welcome to my blog. Today in this blog we will be talking on Jackson Mix-ins feature, which allows us to have better control over the serialization of third party classes in which we cannot add our Jackson annotations. Let's look at below example, Here we are using the Exception class from the java.lang package and we wanted to use this class to represent error object in our...

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Part I : Understanding basics of Fasterxml Jackson

Part I : Understanding basics of Fasterxml Jackson

  March 29, 2019    Anil Sable

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Hello, friends today in this blog we will be learning about the JSON processing in java using "Fasterxml Jackson Library". This library can handle many JSON processing operation like add a node, update the existing node, delete the node from JSON. Serialize java object to JSON and Deserialize back to Java Objects. We will be covering below things in this tutorial Add, Update, Delete Node from...

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Versioning in REST API

Versioning in REST API

  March 24, 2019    Anil Sable

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Hello Friends, Welcome to my blog. Today our topic for discussion is versioning in REST API. We will be using the spring-boot application to demonstrate versioning whereas REST API Versioning is a Theoretical Concept or I would say a kind of design pattern which solves the industry problem. It is a technology independent and you can apply this pattern with any other REST API development frameworks....

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JDB | Using Java Command Line Debugging Tool

JDB | Using Java Command Line Debugging Tool

  March 17, 2019    Anil Sable

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Hello Friends, Welcome to my blog. Today in this blog we will be learning one of the tools provided by Java for the application debugging & inspection known as JDB. It is the command line tool which allows debugging local or remote java application. many developments tools like Eclipse, NetBeans uses JDB internally to debug remote or local the application. JDB is a java command line debugging...

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Spring Boot Micro services - tmp/tomcat working directory gets deleted & unable to perform any multi part upload

Spring Boot Micro services - tmp/tomcat working directory gets deleted & unable to perform any multi part upload

  March 14, 2019    Anil Sable

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Hello friends, Today in this blog we will talk on the below error, which might occur within your Spring boot application. 2019-03-13 00:56:34.824 ERROR 3061 --- [nio-8080-exec-9] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet]...

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Java verbose option with its usage

Java verbose option with its usage

  March 08, 2019    Anil Sable

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Hello  Friends, Welcome back to my blog. Today our topic for this blogs is to understand one of the parameter called "verbose" that we can pass to the java while running your application. As from the parameter name we can guess that it means to have information in details. But how and which cases we should use this, let's have a look. We have 3 verbose parameters as below verbose:class verbose:gc verbose:jni Let's...

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