Java New Features - Java 14, Java 10

Install java 14 using two methods, downloading from Oracle or OpenJDK, and configure java_home and path variables to point to the JDK 14 installation.

Install java 14 in IntelliJ by downloading OpenJDK from the JetBrains site, then add the JDK in Project Structure and set it as the project SDK.

Configure IntelliJ to enable Java 14 preview features by setting project and module language levels to 14 preview (records, patterns, text blocks) and aligning the Java compiler target to 14.

Learn local variable type inference in Java (var): how the compiler infers types from the right-hand side to reduce boilerplate, with examples in loops, streams, arrays, and try-with-resources.

Explore Java 14's JEP 358: helpful null pointer exceptions reveal the exact null variable. Enable the VM option show code details in exception messages, as shown in a city case.

Explore pattern matching for instanceof in Java, enabling concise, safe type checks and use of a pattern variable to avoid explicit casts, with scope considerations and inline checks.

Explore Java records, a concise data carrier feature in Java 14 that auto-generates boilerplate for domain classes, including fields, accessors, constructors, equals, hashCode, and toString.

Java 14 switch expressions replace fall through with arrow labels and allow expression switches and yield, addressing scope and return value issues while staying backward compatible.

Explore Java 14 text blocks, or X blocks, to write multi-line strings with preserved indentation and line breaks, replacing escapes and concatenation, and compare with string literals.

Discover the JDK flight recorder and JDK mission control, with theory and practical guidance to diagnose memory and performance issues in Java applications.

Explore how the JDK flight recorder profiles a Java application, captures diagnostics, and reveals root causes of crashes or performance anomalies through event data.

Learn to run and analyze the JDK flight recorder with command line and jcmd tools, configure duration and continuous recording, and explore mission control insights on gc and jvm internals.

Learn about GFR event streaming for the JDK flight recorder, including a continuous consumption API, low overhead, and coexistence with non streaming recordings, for real time dashboards and alerts.

Explore implementing event streaming with the recording stream class, filtering CPU load and other metrics, using default configurations, starting the stream in blocking or async mode, and setting threshold alerts.

Describes creating event streams with the event stream interface using three factory methods: open repository with argument, open repository without argument, and open file by path to a recording file.

Create custom events by extending the Java Flight Recording API's Event class, annotating name, description, and field labels. Trigger, commit, and listen to events periodically to measure performance.

Explore the JFR flight recorder in Java and use the GFI tool to inspect flight recordings. Print and filter events such as CPU load, garbage collection, and custom events.

Java 14 introduces garbage collection updates, making G1 GC the default and adding NUMA-aware memory allocation optimizations for large heaps, while s.m garbage collector is removed.