raster vs vector

1. https://www.psprint.com/resources/difference-between-raster-vector/
2. 
   

lambda expression

1. https://howtodoinjava.com/java-8-tutorial/
2. https://www.journaldev.com/2389/java-8-features-with-examples
3. 
   

gradle

1. gradle in 5 mins
2. 
   

rest api

1. For simplicity, our example application only sends JSON back and forth, but the application should be architectured in such a way that you can easily change the format of the data, to tailor for different clients or user preferences.
2.  

android rest

1. https://code.tutsplus.com/tutorials/android-from-scratch-using-rest-apis--cms-27117
2. https://code.tutsplus.com/tutorials/a-beginners-guide-to-http-and-rest--net-16340
3. https://dzone.com/articles/creating-a-simple-android-rest-client-using-http-r
4. 
   

spring boot

1. externalized configuration
2. 
   

java features latest

1. optional
2.