Download jre for windows 10 - that's
Install the correct JRE - LibreOffice on windows 10
Install the correct JRE - LibreOffice on windows 10
This description refers to the version LibreOffice 6.
Why Java Runtime Environment (JRE)
LibreOffice Base, see also Documentation, uses the HSQL database, this requires Java Runtime Environment (JRE) 
.
It explains how to install the right Java Runtime Environment (JRE) on Windows 10 and how to integrate it into LibreOffice.
Which version JRE
If you use LibreOffice in the 32-bit version, you must also install the JRE 32-bit version.
If you use LibreOffice in the 64-bit version, you must also install the JRE 64-bit version.
Regardless, you can also install the JRE 32-bit and 64-bit versions in parallel.
JRE – Downlaod
The current JRE can be downloaded from the Java website https://www.java.com or from https://www.java.com/en/download/manual.jsp.
Important Oracle Java License Update - The Oracle Java License has changed for releases starting April 16, 2019.
Examples under Windows
Example 32-Bit version JRE
Example of a downloaded JRE file for the 32-bit version on Windows:
jre-8u171-windows-i586.exe
This is usually in the "Download folder" and still needs to be installed.
Example 64-bit version JRE
Example of a downloaded JRE file for the 64-bit version on Windows:
jre-8u171-windows-x64.exe
This is usually in the "Download folder" and still needs to be installed.
Installation of a JRE
Install the desired JRE file as instructed by your operating system.
If you have older JRE installed, you may be asked to delete it. Confirm this.
JRE register in LibreOffice
To register the JRE in LibreOffice, open LibreOffice.
From the menu Tools ▸ Options ▸ LibreOffice ▸ Advanced.
In the "Options LibreOffice Advanced" dialog box, under "Java Options", check the box "Use a Java Runtime Environment".
If there is no entry here, go to Add and select the JRE and OK.
FAQ - How to install Java (JRE/JDK) so that LibreOffice could use it?
See also other operating systems.
FAQ - How to install Java (JRE/JDK) so that LibreOffice could use it?
Any questions?
If you have any questions, please contact the FAQ(Frequently Asked Questions).
Or ask your question at Ask.Libreoffice
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