• What are the main new features introduced in Java 11?
  • Some of the main new features in Java 11 include:
  • Local-Variable Syntax for Lambda Parameters
  • HTTP Client API
  • Launch Single-File Source-Code Programs
  • Epsilon: A No-Op Garbage Collector
  • Flight Recorder
  • ZGC: A Scalable Low-Latency Garbage Collector
  • Can you explain the Local-Variable Syntax for Lambda Parameters?
  • The Local-Variable Syntax for Lambda Parameters is a new feature introduced in Java 11 that allows var to be used instead of specifying the parameter type explicitly in lambda expressions. This can make the code more concise and easier to read.
• What is the HTTP Client API in Java 11?
  • The HTTP Client API is a new standard API introduced in Java 11 that provides a built-in HTTP client for making HTTP requests and handling responses. This replaces the deprecated HttpURLConnection API and provides a more flexible and efficient way to work with HTTP.
• What is the Launch Single-File Source-Code Programs feature in Java 11?
  • The Launch Single-File Source-Code Programs feature in Java 11 allows you to launch and execute a single source code file without having to compile it first. This can be useful for quick testing or for small utility programs.
• Can you explain the Epsilon: A No-Op Garbage Collector in Java 11?
  • The Epsilon: A No-Op Garbage Collector is a new experimental garbage collector introduced in Java 11 that does not actually collect any garbage. It is intended for use in situations where the application has its own memory management and garbage collection strategy, and can be used to reduce overhead and improve performance.
• What is Flight Recorder in Java 11?
  • Flight Recorder is a new feature introduced in Java 11 that provides a low-overhead event streaming system for monitoring and profiling applications. It can be used to collect and analyze data about application performance, and can be configured to collect specific events or custom events.
• Can you explain the ZGC: A Scalable Low-Latency Garbage Collector in Java 11?
  • The ZGC: A Scalable Low-Latency Garbage Collector is a new experimental garbage collector introduced in Java 11 that is designed to support very large heaps and provide consistent low-latency garbage collection. It uses a concurrent and incremental approach to garbage collection to minimize pause times and improve performance.
• How does the new file system methods in Java 11 improve working with files?
  • Java 11 introduces new file system methods that provide a more efficient and convenient way to work with files. For example, the Files.readString() and Files.writeString() methods can be used to read and write the contents of a file as a string, and the Files.walk() method can be used to recursively traverse a directory and its subdirectories.
• What is the new nest-based access control feature in Java 11?
  • Nest-based access control is a new feature introduced in Java 11 that allows a group of classes to access each other’s private members, without requiring them to be in the same package. This can simplify the design of complex frameworks and libraries.
• Can you explain the dynamic class-file constants feature in Java 11?
  • The dynamic class-file constants feature in Java 11 allows the constant pool of a class to contain dynamic constants, which are resolved at runtime rather than at compile-time. This can be useful for generating code at runtime or for creating custom constants.
• What is the new HttpClient API in Java 11, and how does it differ from the previous HttpURLConnection API?
  • The new HttpClient API in Java 11 is a modern API for making HTTP requests and handling responses. It is more flexible and easier to use than the previous HttpURLConnection API, and supports advanced features such as non-blocking I/O, websockets, and automatic retries.
• Can you explain the new collection factory methods feature in Java 11?
  • The new collection factory methods feature in Java 11 provides a more concise and convenient way to create instances of Collection, List, Set, and Map. For example, you can use the List.of() method to create an immutable list with a fixed number of elements.
• What is the JEP 321 HTTP Client (Standard) feature in Java 11?
  • JEP 321 is the Java Enhancement Proposal for the new standard HttpClient API in Java 11. This feature introduces a new API for making HTTP requests and handling responses, which is more modern and flexible than the previous HttpURLConnection API.
• Can you explain the ZGC garbage collector feature in Java 11?
  • The ZGC garbage collector is a new experimental feature introduced in Java 11 that provides low-latency garbage collection for large heaps. It is designed to minimize pause times and provide consistent performance, even for very large heaps.
• What is the new var keyword enhancement in Java 11?
  • The var keyword enhancement in Java 11 allows the use of the var keyword for lambda expressions, effectively providing the same benefits as the Local-Variable Syntax for Lambda Parameters feature. This can make the code more concise and easier to read.
• Can you explain the new Epsilon garbage collector feature in Java 11?
  • The Epsilon garbage collector is a new experimental feature introduced in Java 11 that is a no-op garbage collector. It can be used for testing or in situations where the application has its own memory management and garbage collection strategy.