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Some JDK products are free-of-cost and some require a fee. So your first chore is to choose a vendor and obtain and install a JDK. So you will find the quality and performance to be largely the same across these JDK products. Nowadays, most of these companies’ offerings are based largely or entirely on the open-source code base collaboratively built at the OpenJDK project.
![download jdk download jdk](https://sandiegoenergy.weebly.com/uploads/1/2/3/7/123743445/441357873.png)
Other vendors include, off the top of my head: Amazon, Azul Systems, Microsoft, Adoptium, SAP, BellSoft, Red Hat/IBM, Pivotal, and maybe more. Oracle Corporation is but one of several vendors providing builds and installers for a JDK. The first sentence of the linked Wikipedia article on JDK is incorrect in claiming Oracle is the sole vendor.
![download jdk download jdk](https://cdn.educba.com/academy/wp-content/uploads/2019/05/Install-JDK.jpg)
A JDK is composed of development tools such as a compiler, and of runtime tools that include a Java Virtual Machine (JVM) and an implementation of the standard libraries including the classes such as ArrayList, LocalDate, and so on. A JDK is an implementation of the Java™ SE (Standard Edition) specifications.
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