Скачать или смотреть java runtime environment variables

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certainly! understanding java runtime environment (jre) variables is crucial for running java applications effectively. in this tutorial, we will cover the following topics:

1. *what is the java runtime environment (jre)?*
2. *why are environment variables important?*
3. *common java environment variables*
4. *setting environment variables*
5. *example: using environment variables in a java program*

1. what is the java runtime environment (jre)?

the java runtime environment (jre) is a part of the java development kit (jdk) that allows you to run java applications. it provides the libraries, java virtual machine (jvm), and other components necessary to execute applications written in java.

2. why are environment variables important?

environment variables are key-value pairs that can affect the way running processes will behave on a computer. for java applications, environment variables can:

specify the location of java installations.
configure jvm options.
set classpaths for finding java classes and libraries.

3. common java environment variables

here are some common environment variables used in java:

**java_home**: this variable points to the root directory of the java installation (jdk or jre). it is often used by build tools and other applications to find java.

**jre_home**: this variable points specifically to the jre installation directory.

**classpath**: this variable specifies the location of user-defined classes and packages. if you do not set this variable, you can specify the classpath at runtime using the `-cp` or `-classpath` options.

**path**: this variable includes the directory of the java binaries (`bin` folder), allowing you to run java commands from any command prompt or terminal.

4. setting environment variables

*on windows:*

1. right-click on "this pc" or "my computer" and select "properties."
2. click on "advanced system settings."
3. click the "environment variables" button.
4. in the " ...

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