Hi I am using Java as my primary language for interviewing.

Most of interviewers expect to code complex algorithms in less than 10 minutes, since java is a statically typed language the syntax is a bit more verbose.

Are there any articles or blogs for quick conversion of primitive type like int[] to collections?
Similarly converting hashset->list syntatically better than writing a loop?
Any references for such type of conversion. Will Java8 streams help me here to write a quick map function to do these type of operations quickly.

In summary, I am looking for syntactic sugars in java for common operations.