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role-and-privilege-for-spring-security-registration

Spring Security – Roles and Privileges 1. Overview This article continues the Registration with Spring Security series with a look at how to properly implement Roles and Privileges. Further reading: Intro to Spring Security Expressions Simple and practical guide to Spring Security Expressions. Read more → Introduction to Spring Method… Continue Reading role-and-privilege-for-spring-security-registration

Posted on: 2019-10-08 2019-11-19
Author: getdocs
Tags: Authorization
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java-two-pointer-technique

Java Two Pointer Technique 1. Overview In this tutorial, we’ll discuss the two-pointer approach for solving problems involving arrays and lists. This technique is an easy and efficient way to improve the performance of our algorithm. 2. Technique Description In many problems involving arrays or lists, we have to analyze each element… Continue Reading java-two-pointer-technique

Posted on: 2019-10-08 2019-11-19
Author: getdocs
Tags: Java
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java-delete-directory

Delete a Directory Recursively in Java 1. Introduction In this article, we’ll illustrate how to delete a directory recursively in plain Java. We’ll also look at some alternatives for deleting directories using external libraries. 2. Deleting a Directory Recursively Java has an option to delete a directory. However, this requires… Continue Reading java-delete-directory

spring-rest-with-zuul-proxy

Spring REST with a Zuul Proxy 1. Overview In this article, we’ll explore the communication between a front-end application and a REST API that are deployed separately. The goal is to work around CORS and the Same Origin Policy restriction of the browser and allow the UI to call the… Continue Reading spring-rest-with-zuul-proxy

Posted on: 2019-10-08 2019-11-19
Author: getdocs
Tags: Zuul
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hbase

HBase with Java 1. Overview In this article, we’ll be looking at the HBase database Java Client library. HBase is a distributed database that uses the Hadoop file system for storing data. We’ll create a Java example client and a table to which we will add some simple records. 2.… Continue Reading hbase

java-string-pool

Guide to Java String Pool 1. Overview The String object is the most used class in the Java language. In this quick article, we’ll explore the Java String Pool — the special memory region where Strings are stored by the JVM. 2. String Interning Thanks to the immutability of Strings… Continue Reading java-string-pool

spring-with-maven

Spring with Maven Table of Contents . Overview . Basic Spring Dependencies with Maven . Spring Persistence with Maven . Spring MVC with Maven . Spring Security with Maven . Spring Test with Maven . Using Milestones . Using Snapshots . Conclusion 1. Overview This tutorial illustrates how to set… Continue Reading spring-with-maven

java-varargs

Varargs in Java 1. Introduction Varargs were introduced in Java 5 and provide a short-hand for methods that support an arbitrary number of parameters of one type. In this article, we’ll see how we can use this core Java feature. 2. Before Varargs Before Java 5, whenever we wanted to… Continue Reading java-varargs

java-temporal-adjuster

TemporalAdjuster in Java 1. Overview In this tutorial, we’ll have a quick look at the TemporalAdjuster and use it in a few practical scenarios. Java 8 introduced a new library for working with dates and times – java.time and TemporalAdjuster is a part of it. If you want to read… Continue Reading java-temporal-adjuster

rxjava-2-flowable

RxJava 2 – Flowable 1. Introduction RxJava is a Reactive Extensions Java implementation that allows us to write event-driven, and asynchronous applications. More information on how to use RxJava can be found in our intro article here. RxJava 2 was rewritten from scratch, which brought multiple new features; some of… Continue Reading rxjava-2-flowable