how to install STS to eclipse oxygen(2018.march) sts is not available in the market place ? i have tried it manually using help> install software> unzipped folder > but it is not working
In case you are interested in the Spring Tools 4, there is no version available that is compatible with Eclipse Oxygen (4.7).
In case you are interested in the Spring Tool Suite 3, there is an update site URL that you could use to manually install that into Eclipse Oxygen from here:
https://dist.springsource.com/release/TOOLS/update/e4.7
This points to version 3.9.5, which is the newest version that is compatible with Eclipse Oxygen (4.7). But this version is outdated and no longer maintained, so we do not recommend to install and use that anymore!
I strongly recommend to use the latest of Spring Tools 4 on Eclipse 2019-12, which you can download from https://spring.io/tools instead.