To download the Java 11 64-bit version, you can go to the Oracle Java website (https://www.oracle.com/java/technologies/javase-downloads.html) and click on the "Download" button for the Java 11 JDK (Java Development Kit).
On the download page, you will need to accept the Oracle Technology Network License Agreement for Java SE and select the "Java SE 11.0.10" version from the drop-down menu.
Then, you can select the "JDK" option and choose the "Windows x64" platform.
Click on the "Download" button to download the Java 11 JDK installer for 64-bit Windows.
Once the download is complete, you can run the installer to install Java 11 on your computer.
It is important to note that the Oracle Java website may require you to create an Oracle account and log in before you can download the Java 11 JDK.
Alternatively, you can download the Java 11 JDK from other sources, such as the AdoptOpenJDK website (https://adoptopenjdk.net/). AdoptOpenJDK provides free and open-source builds of the Java 11 JDK for various platforms, including Windows, Linux, and macOS.