java haskell代写 Resources: for API documentation and Concurrency Tutorial

Java & Haskell

Resources: for API documentation and Concurrency Tutorial. Cut and paste from these is allowed.

https://docs.oracle.com/javase/8/docs/api/ https://docs.oracle.com/javase/tutorial/essential/concurrency/

1. Look at the available methods in the Thread class. Is there a method that will let a thread sleep? How do you call it? [Beware of the exception.]
2. Create a Java class that derives from the Thread class. The run method of the class should write something to the screen, sleep for a little while, and then write something to the screen again before finally returning.
3. Same as previous but as a class that implements the Runnable interface.
4. WriteaJavaprogramthatcreatesonethreadfromeachoftheclassesaboveandthen starts them both. The program should wait until both threads have finished before ending.
5. Create a Counter class using either of the above alternatives that has a private (static) tally, a public getValue method that returns the current tally, and whose run method increments the tally 107 times.
6. Run two Counter threads in parallel. What is the tally after both threads have terminated?
7. Repeat 2 in Haskell. That is, create and run a Haskell thread that prints, sleeps and prints before exiting. You will need to import Control.Concurrent and for sleeping you need threadDelay.