Explore >> Select a destination
|
You are here 
|
studiofreya.org | ||
| | | | |
blog.scaledcode.com
|
|
| | | | | A dive into chapter 52 of Effective Java | |
| | | | |
bruceeckel.com
|
|
| | | | | ||
| | | | |
konradreiche.com
|
|
| | | | | Since most of the Java code I wrote in the past was on Android I was not able to enjoy too many Java 8 features yet. Though recently I wrote a microservice in Java using Spring Boot where I could make full use of lambdas and functional interfaces. The following method, for instance, returns the sum of all transactions for a specified instance by traversing their children. @RequestMapping(value = "/transaction/sum/{id}", method = RequestMethod.GET) BigDecimal Sum sum(@PathVariable long id) { List transactions = new ArrayList<>(); Transaction current = repository.find(id); while (current != null) { transactions.add(current); current = current.getChild(); } return transactions.stream().map(t -> t.getAmount()) .reduce(BigDecimal.ZERO, BigDecimal::add); } As some... | |
| | | | |
www.ralfj.de
|
|
| | | |||
