completable.java

public class RunnableJob implements Runnable{
        @Override
        public void run() {

        }
    }
public void runJobs(){
    CompletableFuture<Void> f = CompletableFuture.runAsync(new RunnableJob());
    f.thenRun(new RunnableJob());

    CompletableFuture<RunnableJob> f2 = CompletableFuture.supplyAsync(()->new RunnableJob());
    f2.thenRun(new RunnableJob());
}