2日前 -The most common Optional anti-pattern is wrapping a potentially null value in an Optional , only to immediately invoke .get() without checking if a value is ...
2026/10/20 -In Spring Boot 4, JSpecify's @Nullable annotation should be used to indicate that a parameter can be null. This recipe adds @Nullable to parameters ...
Welcome back. The most common exception in Java is the Null Pointer Exception. It happens when we use a value that isn't there. Today, we'll learn Optional ...
YouTubeShaaban Ebrahim
2026/10/27 -Optional as Method Parameter — Why It's a Bad Idea Many Java teams use Optional for “maybe‑null” arguments, but this breaks API contracts and trips Spring, ...
2026/10/30 -The Optional.ofNullable() method creates an empty Optional when the supplied value is null. The following program demonstrates its string representation.
5日前 -Explore three ways of dealing with missing or null values in JSON when parsing it with Jackson.
2026/10/27 -... nullable reference with a clearly documented contract may be simpler. You should also avoid returning null from a method declared to return Optional . The ...
2026/10/20 -A nullable value carries a leading presence bool. At a nested position, Type.nullable means the encoded value is a bool, followed by the value's ordinary ...
4日前 -Optional fights with nullable types. A CompletableFuture has to be adapted before it composes with coroutines. A dedicated Kotlin target lets the SDK use ...
2026/10/20 -Optional<T> is a container that holds either one value or nothing. Its job is to make a method's contract visible: a method returning Optional<String> tells the ...