Java Keytool is a key and certificate management tool that is used to manipulate Java Keystores, and is included with Java. A Java Keystore is a container for authorization certificates or public key certificates, and is often used by Java-based applications for encryption,…
URL: https://www.progressiverobot.com/java-queue/ Java Queue is an interface available in java.util package and extends java.util.Collection interface. Just like Java List, Java Queue is a collection of ordered elements (Or objects) but it performs insert and remove operations differently. We can use Queue to store elements before processing those elements.  Java Queue In this section, we […]
URL: https://www.progressiverobot.com/java-singleton-design-pattern-best-practices-examples/ Introduction _Java Singleton Pattern_ is one of the _Gangs of Four Design patterns_ and comes in the _Creational Design Pattern_ category. From the definition, it seems to be a straightforward design pattern, but when it comes to implementation, it comes with a lot of concerns. In this article, we will learn about singleton […]
URL: https://www.progressiverobot.com/java-thread-dump-visualvm-jstack-kill-3-jcmd/ Java Thread dump is list of all the threads active in the JVM. Java Thread Dump Java thread dump is very helpful in analyzing bottlenecks in the application and [deadlock](/community/tutorials/deadlock-in-java-example "Java Deadlock") situations. Here we will learn multiple ways through which we can generate thread dump for a java program. These instructions are […]
URL: https://www.progressiverobot.com/java-zip-file-folder-example/ Today we will look into java zip file example. We will also compress a folder and create zip file using java program. Java ZIP java.util.zip.ZipOutputStream can be used to compress a file into ZIP format. Since a zip file can contain multiple entries, ZipOutputStream uses java.util.zip.ZipEntry to represent a zip file entry. Java […]
URL: https://www.progressiverobot.com/junit-display-name-displayname/ JUnit @DisplayName annotation is used to provide a custom name for the test class and test methods. We can use spaces, special characters, and even emojis in the display name. JUnit Display Name Example By default, [JUnit](/community/tutorials/junit5-tutorial) reporting prints the class name and method name in the IDE test report. We can use […]
URL: https://www.progressiverobot.com/mockito-mock-examples/ Mockito mocking framework provides different ways to mock a class. Let's look at different methods through which we can mock a class and stub its behaviors. Mockito mock method We can use [Mockito](/community/tutorials/mockito-tutorial) class mock() method to create a mock object of a given class or interface. This is the simplest way to […]
URL: https://www.progressiverobot.com/proxy-design-pattern/ Proxy Design pattern is one of the Structural design pattern and in my opinion one of the simplest pattern to understand. Proxy Design Pattern  Proxy design pattern intent according to GoF is: Provide a surrogate or placeholder for another object to control access to it. The definition itself is very […]
URL: https://www.progressiverobot.com/shuffle-array-java/ There are two ways to shuffle an array in Java. Collections.shuffle() Method Random Class 1. Shuffle Array Elements using Collections Class We can create a list from the array and then use the Collections class shuffle() method to shuffle its elements. Then convert the list to the original array. package com.journaldev.examples; import java.util.Arrays; […]
URL: https://www.progressiverobot.com/thread-life-cycle-in-java-thread-states-in-java/ Understanding Thread Life Cycle in Java and Thread States are very important when you are working with Threads and programming for multithreaded environment. From our last tutorial, we can create a [java thread](/community/tutorials/java-thread-example "Java Thread Example – Extending Thread Class and Implementing Runnable Interface") class by implementing Runnable interface or by extending Thread […]
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