Do I need JDK or JRE?

Do I need JDK or JRE?

In simple terms, if you want to run Java program you need JRE. If you are not a programmer, you don’t need to install JDK, but just JRE to run Java programs. Though, all JDK versions comes bundled with Java Runtime Environment, so you do not need to download and install the JRE separately in your PC.

Should I install JDK or JRE first?

1 Answer. You do not need to install JRE then, as JDK usually consists of both development & run-time environments in it. If you install JDK then JRE will already be packaged in it and installed automatically along with JDK. Generally to do javac

Do I need both Java JRE and JDK?

The JDK includes the JRE, so you do not have to download both separately. If you need the JRE on a server and do not want the ability to run RIAs, download the Java SE Server JRE.

Is JDK enough to run Java program?

Without JDK, you can not create Java applications and programs. By the way, JDK comes with its own JRE, but when you run Java program using java command, the JRE which comes first in System PATH is used for execution.

Why is installing only JDK is necessary?

You need a compiler and some supporting files and classes (that is, the JDK) to develop software. But you don’t need that to run Java programs, you just need the Java Runtime Environment. Since Java 12 there is no JRE anymore, only the JDK .

How do I know if I have JDK or JRE Windows?


  1. Open the command prompt. Follow the menu path Start > Programs > Accessories > Command Prompt.
  2. Type: java -version and press Enter on your keyboard. Result: A message similar to the following indicates that Java is installed and you are ready to use MITSIS via the Java Runtime Environment.

Does JRE still exist?

In Windows and macOS, installing the JDK in previous releases optionally installed a JRE. In JDK 11, this is no longer an option. In this release, the JRE or Server JRE is no longer offered. Only the JDK is offered.

Can you code on JDK?

The JVM is the Java platform component that executes programs. The JRE is the on-disk part of Java that creates the JVM. The JDK allows developers to create Java programs that can be executed and run by the JVM and JRE.

Is Java and JDK version same?

The Java Development Kit (JDK) is part of the Java SE Product, there are other parts as well, but you can treat them as the same thing for development purposes.

Do I need to pay for Java JDK?

Oracle JDK 8 and Oracle JDK 11 are free for Personal, Development and other uses. Oracle JDK 17 and later release are available under a Oracle No-Fee Terms and Conditions License for all users.