OpenJDK, newer Java versions

[briancolecoinmetrics]

Currently https://github.com/tronprotocol/java-tron/blob/develop/build.md says,

JDK 1.8 (JDK 1.9+ are not supported yet)
On Linux Ubuntu system (e.g. Ubuntu 16.04.4 LTS), ensure that the machine has Oracle JDK 8, instead of having Open JDK 8 in the system. If you are building the source code by using Open JDK 8, you will get Build Failed result.

First: OpenJDK works fine and has for a while; we've been building with openjdk-8-jdk-headless and running on openjdk-8-jre-headless on Ubuntu for a while now.

Second: While Java 8 will keep getting security updates for a while yet, it's nearing the end of its normal support life; is there any plan to support newer levels?

[Benson0224]

Thanks for your suggestion.
Team will update you here if there is a plan on the Java new versions.

[andelf]

For compatibility with the mainnet, java-tron can only be run on x86-64 platforms(and jdk8). It requires 8087 float instructions.

[ai-chen2050]

For compatibility with the mainnet, java-tron can only be run on x86-64 platforms(and jdk8). It requires 8087 float instructions.

I use the mac m1 pro/jdk8,whether work?

[halibobo1205]

For compatibility with the mainnet, java-tron can only be run on x86-64 platforms(and jdk8). It requires 8087 float instructions.

I use the mac m1 pro/jdk8,whether work?

Use x86_jdk8 can work well.

[ethan1844]

Thanks for your contribution to java-tron, this issue will be closed as no update for a long time.

Please feel free to re-open it if you still see the issue, thanks