is it possible to define execution order for a set of threads in java

Question

My understanding is that threads in theory are executed in parallel. JVM decides; when a resource is available which thread to pick from the waiting thread queue (based on some

Answer 1

Since java 8 this has become very easy using CompletableFuture :

CompletableFuture.runAsync(runnable3)
            .thenRunAsync(runnable1)
            .thenRunAsync(runnable2);