There are plenty of Java tools designed to make it significantly simpler to write good Java code. So, here are some tools that can make your job easier.
1. Eclipse
Open-source integrated development environment (IDE). If you could have just one tool for Java development, Eclipse would be a good choice.
2. Clover
Code coverage tool from Atlassian. Runs in your IDE or continuous integration system, and includes test optimization to make tests run faster and fail sooner.
3. Mockito
An open-source testing framework that enables the creation, verification, and stubbing of mocks.
4. Jetty
It is a lightweight, embeddable app server. Jetty provides a Web server and javax.servlet container, plus support for HTTP/2, WebSocket, OSGi, JMX, JNDI, JAAS and many other integrations.
5. Hibernate
Hibernate is an Object/Relational Mapper tool. It’s very popular among Java applications and implements the Java Persistence API. Hibernate ORM enables developers to more easily write applications whose data outlives the application process.
6. JUnit
Unit test framework. Core tool of test-driven development that enables repeatable, white-box testing.
7. Jenkins
Jenkins is a self-contained Java-based program, ready to run out-of-the-box, with packages for Windows, Mac OS X, and other Unix-like operating systems.
8. FindBugs
FindBugs, a program which uses static analysis to look for bugs in Java code. Available as a standalone GUI or as a plugin for Eclipse, NetBeans, IntelliJ, Gradle, Hudson, and Jenkins.
9. Snappy
A Snappy application is basically a single compressed archive package with all the files contained within for the app to run. n other words, a single Snappy application contains all its dependencies within
10. JD-GUI
Decompiler. Standalone graphic utility that displays source codes of “.class” files. Free for non-commercial use (i.e., can’t be included or embedded in commercial products).