It then creates a JVM instance, or local copy, that finally runs the Java programs. The JRE combines the Java code that you create by using the JDK with additional built-in code called libraries.

Role of the JRE in Java programming language For example, you can change the JVM memory setting and check how much internal memory your Java applications use at runtime. Developers configure the JVM settings to manage program resources when the Java application runs.

The JVM is software that runs the Java program line by line. For example, Java Standard Edition, or Java SE, requires the Java SE JDK. Select the JDK software version that matches the Java version you want to use. You can set up the JDK in your development environment by downloading and installing it. The JDK is a collection of software tools that you can use for developing Java applications. The Java Development Kit (JDK) and Java Virtual Machine (JVM) are the other two components. The JRE is actually one of three Java platform components that are required for any Java program to run successfully. The Java Runtime Environment (JRE) technology was created as a solution to this problem.

However, this meant that developers had to write different code for each operating system that they wanted their applications to run on. In the past, most software used the operating system directly as its runtime environment. A software program needs a runtime environment that provides access to memory and other system resources such as program files and dependencies.

Java runtime environment 64 bit