If your imagination is lacking, your best bet is to Google something like "java beginner practice problems" and investigate what you get back. Or start with Sun's on-line Java tutorial and work you way all the way through it. You'll know a fair amount about Java when you're done. ... Once you are quite good in Java SE (lets say you are able to pass SCJP), I'd suggest you get junior Java programmer ... More on stackoverflow.com

https://geeksforgeeks.com . https://hackerrank.com . https://hackerearth.com . https://codechef.com . https://codeforces.com . https://learnbyexample.com . https://dmoj.ca . https://codewars.com . These are some websites for practicing coding EDIT: including suggestions from the comments https://www.baeldung.com/java-tutorial More on reddit.com

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Use a database deployment tool like Liquibase or Flyway. Invaluable (and not Unvaluable :/). More on reddit.com