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As far as I know there are no plans from oracle to ship java for 32 Bit - but maybe I misunderstand the situation. If I'm correct - what do we all do if we need to support 32-Bit libraries (dlls)? And whats about 32 Bit OSes out there? Currently this seems to be a huge impact in the future but as I said - maybe I'm wrong. Fact is that we can't download a Java 10 runtime in 32 Bit as there are only 64 Bit Download-Links.
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Java is available on Microsoft Windows in 64 and 32 bit versions, allowing users to get the appropriate version for their system. Users can even run both side-by-side for 64 bit operating systems.
According to https://bell-sw.com/pages/supported-configurations/ Liberica Java 8, 11 and 17 are available for 32 bit Desktop Windows and supports Window 7 SP1, Windows 8 and Windows 10. There may be other alternatives too.
That's all about the difference between 32-bit and 64-bit JVM in Java. As you have seen, the key difference comes in how much memory you can allocate, while 32-bit JVM can just have 4G which is very less for modern, memory-intensive Java application, 64-bit JVM virtually gives you unlimited memory.
For RHEL, redhat still offers 32bit java-11 in their repository:
java-11-openjdk-devel.i686 1:11.0.6.10-1.el7_7
Had a similar issue, just with Java 11. Eventually, I found a 32bit JDK and JRE for Java 11 on https://adoptopenjdk.net/ (for the Hotspot JVM). With the 32bit JDK, I successfully connected to a 32bit dll. I hope this is useful for others who face a similar situation.
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There is no 32-bit Java 10 distribution from Oracle. And there will be no Java 11 distribution as well. There are a few companies which offer a 32-bit support though (like Azul). However, I recommend continuing using Java 8 32-bit. It has official support from Oracle and it will be maintained until January 2019.
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Oracle is not the only party building and distributing OpenJDK. For example Azul maintains, but does not certify as TCK-compliant, 32bit windows builds as part of their Zulu project.
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