How to print the following output in java

Question

. *
* * *
* * * * *
* * *
*

Answer 1

This: https://code.sololearn.com/cg2bml04fOG5/#java is one way. There are potentially millions of ways. Fun to write it. Hopefully it is not a homework and I'm not spoiling you ;P

Answer 2

Another (basic) way:
https://code.sololearn.com/cLNtxAQDfZgl/?ref=app

Answer 3

Thank you @venkatesh and visph