Java is installed, but why isn't it recognized?

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Java is installed, but why isn't it recognized?

Are you sure that you have the right version of Java installed? Please check the release notes for the version of OpenOffice you have installed.

The Java system version that is pre-installed on a new computer or that comes with the distribution of an operating system may or may not work with Apache OpenOffice. To be sure, we recommend to download the current version of the Java Runtime Environment from

After installation of OpenOffice, if Java is still not recognized, click Tools → Options → OpenOffice → Java. The OpenOffice Java window will open. It takes some time for the software to populate the big list box. Be patient. In the box under "Java is already installed", ensure that the right version of Java has an activated radio button. Java will now be recognized by OpenOffice. You may have to repeat this step when you update Java Runtime Environment.

Documentation note.png For Windows Users

Apache OpenOffice supports Java 8 (32-bit), which is the recommended configuration; but (especially on 64-bit Windows) you might receive warnings about the Java version being defective. In that case, download and install the Microsoft Visual C++ Redistributable for Visual Studio 2015, 2017 and 2019.

Documentation note.png IMPORTANT NOTE: You MUST have a 32-bit Java Runtime Environment (JRE) even on a 64-bit machine.
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