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Title: Objects.requireNonNullElse() | java.evolved

Open Graph Title: Objects.requireNonNullElse() | java.evolved

X Title: Objects.requireNonNullElse() | java.evolved

Description: Get a non-null value with a clear default, no ternary needed.

Open Graph Description: Get a non-null value with a clear default, no ternary needed.

X Description: Get a non-null value with a clear default, no ternary needed.

Opengraph URL: https://javaevolved.github.io/errors/require-nonnull-else.html

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Domain: javaevolved.github.io

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🐛 Report a code issue	https://github.com/javaevolved/javaevolved.github.io/issues/new?template=code-issue.yml&title=%5BCode%20Issue%5D%20Objects.requireNonNullElse%28%29&category=errors&slug=require-nonnull-else
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Let us know.	https://github.com/javaevolved/javaevolved.github.io/issues/new?template=code-issue.yml&title=%5BCode%20Issue%5D%20Objects.requireNonNullElse%28%29&category=errors&slug=require-nonnull-else
Objects.requireNonNullElse() ↗	https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/Objects.html#requireNonNullElse(T,T)
Objects.requireNonNullElseGet() ↗	https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/Objects.html#requireNonNullElseGet(T,java.util.function.Supplier)
View proof source ↗	https://github.com/javaevolved/javaevolved.github.io/blob/main/proof/errors/RequireNonnullElse.java
Errors Beginner Helpful NullPointerExceptions Java 8 // Old NPE message: // "NullPointerException" // at MyApp.main(MyApp.java:42) // Which variable was null?! Java 14+ // Modern NPE message: // Cannot invoke "String.length()" // because "user.address().city()" // is null // Exact variable identified! Hover to see modern ➜ JDK 14+ →	https://javaevolved.github.io/errors/helpful-npe.html
Errors Intermediate Record-based error responses Java 8 // Verbose error class public class ErrorResponse { private final int code; private final String message; // constructor, getters, equals, // hashCode, toString... } Java 16+ public record ApiError( int code, String message, Instant timestamp ) { public ApiError(int code, String msg) { this(code, msg, Instant.now()); } } Hover to see modern ➜ JDK 16+ →	https://javaevolved.github.io/errors/record-based-errors.html
Errors Beginner Optional chaining Java 8 String city = null; if (user != null) { Address addr = user.getAddress(); if (addr != null) { city = addr.getCity(); } } if (city == null) city = "Unknown"; Java 9+ String city = Optional.ofNullable(user) .map(User::address) .map(Address::city) .orElse("Unknown"); Hover to see modern ➜ JDK 9+ →	https://javaevolved.github.io/errors/optional-chaining.html
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