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.
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.
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.
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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