Why aren't Java Collections remove methods generic?

I recently came across a small problem. The program ran fine, but my IDE had it underlined as being highly dodgy.

It is the same for Collection.contains and Map.get

Just see the references why this is.

References

StackOverflow - Why aren't Java Collections remove methods generic?

https://stackoverflow.com/questions/104799/why-arent-java-collections-remove-methods-generic

Youtube - Advanced Topics in Programming Languages: Java Puzzlers,...

https://www.youtube.com/watch?v=wDN_EYUvUq0

Running Java in the Cloud - Jelastic

So I decided to try running some of my stuff in the cloud, instead of having to hire a Virtual Machine type thing.

In order to have to limit my changes, I decided to go with Jelastic¹.

I decided to try out hosting provider EAPPS², because they are one of the providers of PaaS³ with Jelastic⁴.

They suggested I'd read up on [5].

Some requirements I'd like:

1. must support Let's Encrypt certificates
2. access to the filesystem would be nice (I'm keeping logfiles)
3. A Mysql/MariaDB database is a must
4. Need to be able to upload an existing database
5. Easily create backups.
6. Must support websockets
7. Support DNS for custom domains.

It supports all of those, and relieves me of some server administration and maintenance.

References

[1] Jelastic

https://jelastic.com/

[2] EAPPS HOSTING - Leading Managed Hosting Provider

https://www.eapps.com/

[4] eApps PaaS, Powered by Jelastic

https://www.eapps.com/platforms/paas.php

[3] Wikipedia - PaaS

https://en.wikipedia.org/wiki/Platform_as_a_service

[5] Getting Started with eApps Platform as a Service (PaaS)

https://support.eapps.com/index.php?/Knowledgebase/Article/View/535/79/getting-started-with-eapps-paas-platform-as-a-service

Jelastic Blog - JDBC Connection Pool for GlassFish and Payara Java Application Servers

https://jelastic.com/blog/jdbc-connection-pool-java-glassfish-payara/

Jelastic Blog - Free Let’s Encrypt SSL Certificates: Out-of-Box Integration with the Most Popular Software Stacks

https://jelastic.com/blog/free-ssl-certificates-with-lets-encrypt/

Jelastic - Import and Export Dump Files to MySQL/MariaDB

https://docs.jelastic.com/dump-import-export-to-mysql/

Jelastic - Storing Data in Local Filesystem

https://docs.jelastic.com/local-filesystem-storage/

DockerHub - jelastic/payara

https://hub.docker.com/r/jelastic/payara/

Jelastic - Sending e-mail from your jelastic environment

https://support.eapps.com/index.php?/Knowledgebase/Article/View/535/79/getting-started-with-eapps-paas-platform-as-a-service#sending-e-mail-from-your-jelastic-environment

Jelastic Developers Center - WebSockets Support for Java

https://docs.jelastic.com/websockets-java/

Jelastic Developers Center - Custom Domain Name

https://docs.jelastic.com/custom-domains/