Java.tex 3.5 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172
  1. %!TEX root = Programmierparadigmen.tex
  2. \chapter{Java}
  3. \index{Java|(}
  4. Im Folgenden wird in aller Kürze erklärt, wie man in Java Programme schreibt,
  5. die auf mehreren Prozessoren laufen.
  6. \section{Thread, ThreadPool und Runnable}
  7. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  8. \texttt{Interface Runnable}\\
  9. \-\hspace{0.8cm}$\leftharpoonup$ \texttt{java.lang.Thread}\xindex{Runnable}%
  10. \begin{itemize}
  11. \item Methods:
  12. \begin{itemize}
  13. \item \texttt{void run()}: When an object implementing interface
  14. Runnable is used to create a thread, starting the thread causes the
  15. object's run method to be called in that separately executing thread.
  16. \end{itemize}
  17. \end{itemize}
  18. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  19. \texttt{Class Thread}\\
  20. \-\hspace{0.8cm}$\leftharpoonup$ \texttt{java.lang.Thread}\xindex{Thread}%
  21. \begin{itemize}
  22. \item implements Runnable
  23. \end{itemize}
  24. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  25. \texttt{Class ThreadPoolExecutor}\xindex{ThreadPoolExecutor}\\
  26. \-\hspace{0.8cm}$\leftharpoonup$ \texttt{java.util.concurrent.ThreadPoolExecutor}
  27. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  28. \texttt{Interface Callable<V>}\xindex{Callable}\\
  29. \-\hspace{0.8cm}$\leftharpoonup$ \texttt{java.util.concurrent}
  30. \begin{itemize}
  31. \item Parameter: \texttt{V} - the result type of method call
  32. \end{itemize}
  33. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  34. \section{Futures}\xindex{Future}\index{Promise|see{Future}}
  35. \enquote{Ein Future (engl. \enquote{Zukunft}) oder ein Promise (engl. \enquote{Versprechen}) bezeichnet in der Programmierung einen Platzhalter (Proxy) für ein Ergebnis, das noch nicht bekannt ist, meist weil seine Berechnung noch nicht abgeschlossen ist.}
  36. \texttt{Interface Future<V>}\xindex{Future}\\
  37. \-\hspace{0.8cm}$\leftharpoonup$ \texttt{java.util.concurrent}
  38. \textbf{Parameter}:
  39. \begin{itemize}
  40. \item \texttt{V}: The result type returned by this Future's get method
  41. \end{itemize}
  42. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  43. \textbf{Beispiel}:
  44. % Zu lang, geht das kürzer?
  45. %\inputminted[numbersep=5pt, tabsize=4]{java}{scripts/java/matrix-multiplication.java}
  46. \begin{beispiel}[Runnable, ExecutorService, ThreadPool\footnotemark]
  47. \inputminted[numbersep=5pt, tabsize=4]{java}{scripts/java/vorlesung-futures-basics.java}
  48. \end{beispiel}
  49. \footnotetext{WS 2013/2014, Kapitel 41, Folie 26}
  50. \section{Literatur}
  51. \begin{itemize}
  52. \item \href{http://openbook.galileocomputing.de/javainsel9/javainsel_14_004.htm}{Java ist auch eine Insel}: Kapitel 14 -
  53. Threads und nebenläufige Programmierung
  54. \item \href{http://www.vogella.com/tutorials/JavaConcurrency/article.html}{vogella.com}: Java concurrency (multi-threading) - Tutorial
  55. \item Links zur offiziellen Java 8 Dokumentation:
  56. \begin{itemize}
  57. \item \href{http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ThreadPoolExecutor.html}{ThreadPoolExecutor}
  58. \item \href{http://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html}{Runnable}
  59. \item \href{http://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html}{Thread}
  60. \item \href{http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Callable.html}{Callable}
  61. \item \href{http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html}{Future}
  62. \end{itemize}
  63. \end{itemize}
  64. \index{Java|)}