The java.util.concurrent approach also introduced the ability to set time units explicitly rather than specifying everything in number of milliseconds. This is available via the TimeUnit enum.

IBM’s Yao Qi, Raja Das, and Zhi Da Luo describe jucprofiler, an alphaWorks tool designed to profile multicore applications that make use of the java.util.concurrent classes introduced in Java 5.

Java has a powerful new concurrency model, and it works with both traditional and virtual threads. Here's a first look at structured concurrency.