Comments (4)
I've had some success using Optional as a null replacement and discouraging the use of null. I agree that the section on Optionals in the guide needs to be rewritten, but I'm not so sure I want to go as far as saying it should be return only.
I'd like to hear other views on this.
from better-java.
Could you mention that there is some controversy and present both approaches?
Also interesting: https://www.linkedin.com/pulse/java-8-obliged-do-optional-siegfried-steiner
from better-java.
I think that's a good plan.
from better-java.
The section about "Avoid Nulls" has the same issue: https://github.com/cxxr/better-java#avoid-nulls
Using Optional as method param or class field is awkward. Look at the JDK code itself: Optional only exists as a return type. And in very few cases as an if-else-throw or if-else-supplier replacement.
The "Avoid Nulls" code should look like this:
public class FooWidget {
private final String data;
private final Bar bar;
public FooWidget(String data, Bar bar) {
this.data = data;
this.bar = bar;
}
public Optional<Bar> getBar() {
return Optional.ofNullable(bar);
}
}
(Or if you really really want the small performance optimizations create the Optional.ofNullable in the constructor.)
from better-java.
Related Issues (20)
- Information about generics
- Warning for Enter Blog in chrome Version 45.0.2454.93 m HOT 1
- Builder method and inheritance HOT 3
- Collections and Generics section
- Review "Avoid lots of Util classes" HOT 1
- Add information about CompleteableFuture
- mention that javaposse stopped HOT 2
- There is a GPL licensed alternative to JRebel called DCEVM
- More things to Consider
- Quality tool - error-prone
- Code quality - suggestion
- #1 HOT 6
- How to define a mutable object? HOT 3
- Add link to Java 8 Tutorial
- Change jMock to Mockito HOT 4
- Consider another great tool IceFig
- Eclipse EMF
- A resource to make better java even better...
- Mention AutoValue and Lombok in struct and builder sections HOT 3
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from better-java.