Java 8 Is Released

Java 8 was released in March 2014 and introduced the largest language-level change Java had seen in years: lambda expressions. Lambdas made it possible to pass behavior as values more naturally, reducing the need for verbose anonymous classes.

The new Stream API built on lambdas to express pipelines such as filtering, mapping, grouping, and reducing collections. Streams could also support parallel execution, although safe and efficient parallelism still depended on the workload.

Java 8 added default methods to interfaces, which helped library designers evolve APIs without breaking every implementation, and introduced the java.time package for modern date and time handling. The release modernized Java while preserving compatibility with an enormous existing ecosystem.