Java 24 has been released in 2025, featuring significant improvements such as a 42% faster startup time due to ahead-of-time class loading and enhancements in coding practices like stream gatherers and pattern matching in switch statements. However, it also removes the outdated Security Manager and drops support for 32-bit Windows, reflecting a modernization of the platform.
In 2025, Java 24 has been released, and it serves as a reminder that Java continues to receive updates, even for those still using Java 8. Despite its reputation as a less favored programming language compared to Kotlin and C, Java remains popular among developers due to its job market viability. Many Java developers appreciate the language not for its syntax or ease of use but for the employment opportunities it provides, especially in environments that require robust applications like Spring Boot.
One of the significant improvements in Java 24 is the enhancement of startup times, which have historically been a drawback, particularly in cloud environments where quick boot times are essential. With the introduction of ahead-of-time (AOT) class loading and linking, Java applications can now start up at least 42% faster. This improvement stems from Project Loom, which aimed to optimize Java’s startup performance by implementing static runtime images, shifting some of the workload from runtime to pre-runtime.
Java 24 also introduces new features to streamline coding practices. The addition of stream gatherers allows developers to group and batch elements more intuitively, reducing the need for complex logic that was previously required. Additionally, the handling of synchronized blocks within virtual threads has been improved, eliminating the risk of freezing the system, which was a significant issue in earlier versions. This enhancement allows for safer and more efficient use of virtual threads.
Another notable change in Java 24 is the reduction of boilerplate code through the introduction of pattern matching in switch statements. This feature simplifies the process of checking different object types, making the code cleaner and more readable. While Java has been criticized for its verbosity, these updates help it catch up with other programming languages that have offered similar features for years.
On the downside, Java 24 has removed the Security Manager, a feature that was intended to protect against untrusted code but had become largely obsolete. The removal reflects a shift towards using containers, OS permissions, and other security frameworks that have emerged as more effective solutions. Additionally, Java 24 has dropped support for 32-bit Windows, signaling a move towards modernizing the platform and leaving behind outdated systems. This decision may raise questions for those still using 32-bit Windows, highlighting the need for developers to adapt to current technologies.