{"id":26747,"date":"2021-04-30T23:10:08","date_gmt":"2021-05-01T03:10:08","guid":{"rendered":"http:\/\/bangla.salearningschool.com\/recent-posts\/rmi-example-numerical-integration-a-more-realistic-rmi-example-that-sends-an-evaluatable-object-function-from-a-client-to-a-server-for-numerical-integration-programming-code-examples-java-j2\/"},"modified":"2021-04-30T23:10:08","modified_gmt":"2021-05-01T03:10:08","slug":"rmi-example-numerical-integration-a-more-realistic-rmi-example-that-sends-an-evaluatable-object-function-from-a-client-to-a-server-for-numerical-integration-programming-code-examples-java-j2","status":"publish","type":"post","link":"http:\/\/bangla.sitestree.com\/?p=26747","title":{"rendered":"# RMI Example – Numerical Integration, a more realistic RMI example that sends an evaluatable object (function) from a client to a server for numerical integration. #Programming Code Examples #Java\/J2EE\/J2ME #Network Programming"},"content":{"rendered":"
\n# RMI Example - Numerical Integration, a more realistic RMI example that sends an evaluatable object (function) from a client to a server for numerical integration. \n\nIntegral.java  Performs actual numerical integration of the function (evaluatable object).\n\n\/** A class to calculate summations and numeric integrals. The\n *  integral is calculated according to the midpoint rule.\n *\n *  Taken from Core Web Programming from\n *  Prentice Hall and Sun Microsystems Press,\n *  .\n *  © 2001 Marty Hall and Larry Brown;\n *  may be freely used or adapted.\n *\/\n\npublic class Integral {\n  \/** Returns the sum of f(x) from x=start to x=stop, where the\n   *  function f is defined by the evaluate method of the\n   *  Evaluatable object.\n   *\/\n\n  public static double sum(double start, double stop,\n                           double stepSize,\n                           Evaluatable evalObj) {\n    double sum = 0.0, current = start;\n    while (current  0) ? args[0] : "localhost";\n      RemoteIntegral remoteIntegral =\n        (RemoteIntegral)Naming.lookup("rmi:\/\/" + host +\n                                      "\/RemoteIntegral");\n      for(int steps=10; steps 0) ? args[0] : "localhost";\n      RemoteIntegral remoteIntegral =\n        (RemoteIntegral)Naming.lookup("rmi:\/\/" + host +\n                                      "\/RemoteIntegral");\n      for(int steps=10; steps< =10000; steps*=10) {\n        System.out.println\n          ("Approximated with " + steps + " steps:" +\n           "n  Integral from 0 to pi of sin(x)=" +\n           remoteIntegral.integrate(0.0, Math.PI,\n                                    steps, new Sin()) +\n           "n  Integral from pi\/2 to pi of cos(x)=" +\n           remoteIntegral.integrate(Math.PI\/2.0, Math.PI,\n                                    steps, new Cos()) +\n           "n  Integral from 0 to 5 of x^2=" +\n           remoteIntegral.integrate(0.0, 5.0, steps,\n                                    new Quadratic()));\n      }\n      System.out.println\n        ("`Correct' answer using Math library:" +\n         "n  Integral from 0 to pi of sin(x)=" +\n         (-Math.cos(Math.PI) - -Math.cos(0.0)) +\n         "n  Integral from pi\/2 to pi of cos(x)=" +\n         (Math.sin(Math.PI) - Math.sin(Math.PI\/2.0)) +\n         "n  Integral from 0 to 5 of x^2=" +\n         (Math.pow(5.0, 3.0) \/ 3.0));\n    } catch(RemoteException re) {\n      System.out.println("RemoteException: " + re);\n    } catch(NotBoundException nbe) {\n      System.out.println("NotBoundException: " + nbe);\n    } catch(MalformedURLException mfe) {\n      System.out.println("MalformedURLException: " + mfe);\n    }\n  }\n}\n\nrmiclient.policy  Policy file for the client. Grants permissions for the client to connect to the RMI server and Web server. \n\n\/\/  Taken from Core Web Programming from\n\/\/  Prentice Hall and Sun Microsystems Press,\n\/\/  .\n\/\/  © 2001 Marty Hall and Larry Brown;\n\/\/  may be freely used or adapted.\n\ngrant {\n  \/\/ rmihost - RMI registry and the server\n  \/\/ webhost - HTTP server for stub classes\n  permission java.net.SocketPermission \n    "rmihost:1024-65535", "connect";\n  permission java.net.SocketPermission \n    "webhost:80", "connect";\n};\n\n\n\n<\/pre>\n
Note: Brought from our old site: http:\/\/www.salearningschool.com\/example_codes\/ on Jan 2nd, 2017 From: http:\/\/sitestree.com\/?p=10239
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 Post Data:2017-01-02 16:04:28<\/p>\n
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# RMI Example – Numerical Integration, a more realistic RMI example that sends an evaluatable object (function) from a client to a server for numerical integration. Integral.java Performs actual numerical integration of the function (evaluatable object). \/** A class to calculate summations and numeric integrals. The * integral is calculated according to the midpoint rule. … <\/p>\n
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The \u00a0*\u00a0 integral is calculated according to the midpoint rule. \u00a0* \u00a0*\u00a0 Taken from Core Web Programming from \u00a0*\u00a0 Prentice Hall and Sun Microsystems Press, \u00a0*\u00a0 . \u00a0*\u00a0 \u00a9 2001 Marty\u2026","rel":"","context":"In "Code . Programming Samples . \u09aa\u09cd\u09b0\u09cb\u0997\u09cd\u09b0\u09be\u09ae \u0989\u09a6\u09be\u09b9\u09b0\u09a8"","block_context":{"text":"Code . Programming Samples . \u09aa\u09cd\u09b0\u09cb\u0997\u09cd\u09b0\u09be\u09ae \u0989\u09a6\u09be\u09b9\u09b0\u09a8","link":"http:\/\/bangla.sitestree.com\/?cat=1417"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":10206,"url":"http:\/\/bangla.sitestree.com\/?p=10206","url_meta":{"origin":26747,"position":1},"title":"RMI Example – Message, illustrates retrieving a message from an object located on a remote server. 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