Java 9 has unpatched CVE vulnerabilities (Common Vulnerabilities and Exposures) discovered after 2018. Do use Java 9 on a machine connected to the internet for general browsing, banking, or untrusted applets (though applets are deprecated anyway).
: jdk-9.x.x_windows-x64_bin.exe (where x represents the update number). java 9 download 64-bit windows 10
%JAVA_HOME%\bin