{"id":27064,"date":"2021-05-09T23:10:06","date_gmt":"2021-05-10T03:10:06","guid":{"rendered":"http:\/\/bangla.salearningschool.com\/recent-posts\/the-class-that-actually-gets-the-strings-over-the-network-by-means-of-an-objectinputstream-via-http-tunneling-programming-code-examples-java-j2ee-j2me-applets-and-basic-graphics\/"},"modified":"2021-05-09T23:10:06","modified_gmt":"2021-05-10T03:10:06","slug":"the-class-that-actually-gets-the-strings-over-the-network-by-means-of-an-objectinputstream-via-http-tunneling-programming-code-examples-java-j2ee-j2me-applets-and-basic-graphics","status":"publish","type":"post","link":"http:\/\/bangla.sitestree.com\/?p=27064","title":{"rendered":"The class that actually gets the strings over the network by means of an ObjectInputStream via HTTP tunneling. #Programming Code Examples #Java\/J2EE\/J2ME #Applets and Basic Graphics"},"content":{"rendered":"
\nimport java.net.*;\nimport java.io.*;\n\n\/** When this class is built, it returns a value\n *  immediately, but this value returns false for isDone\n *  and null for getQueries. Meanwhile, it starts a Thread\n *  to request an array of query strings from the server,\n *  reading them in one fell swoop by means of an\n *  ObjectInputStream. Once they've all arrived, they\n *  are placed in the location getQueries returns,\n *  and the isDone flag is switched to true.\n *  Used by the ShowQueries applet.\n *  
\n *  Taken from Core Web Programming Java 2 Edition\n *  from Prentice Hall and Sun Microsystems Press,\n  *  May be freely used or adapted.\n *\/\n\npublic class QueryCollection implements Runnable {\n  private String[] queries;\n  private String[] tempQueries;\n  private boolean isDone = false;\n  private URL dataURL;\n\n  public QueryCollection(String urlSuffix, URL currentPage) {\n    try {\n      \/\/ Only the URL suffix need be supplied, since\n      \/\/ the rest of the URL is derived from the current page.\n      String protocol = currentPage.getProtocol();\n      String host = currentPage.getHost();\n      int port = currentPage.getPort();\n      dataURL = new URL(protocol, host, port, urlSuffix);\n      Thread queryRetriever = new Thread(this);\n      queryRetriever.start();\n    } catch(MalformedURLException mfe) {\n      isDone = true;\n    }\n  }\n\n  public void run() {\n    try {\n      tempQueries = retrieveQueries();\n      queries = tempQueries;\n    } catch(IOException ioe) {\n      tempQueries = null;\n      queries = null;\n    }\n    isDone = true;\n  }\n\n  public String[] getQueries() {\n    return(queries);\n  }\n\n  public boolean isDone() {\n    return(isDone);\n  }\n\n  private String[] retrieveQueries() throws IOException {\n    URLConnection connection = dataURL.openConnection();\n    \/\/ Make sure browser doesn't cache this URL, since\n    \/\/ I want different queries for each request.\n    connection.setUseCaches(false);\n    \/\/ Use ObjectInputStream so I can read a String[]\n    \/\/ all at once.\n    ObjectInputStream in =\n      new ObjectInputStream(connection.getInputStream());\n    try {\n      \/\/ The return type of readObject is Object, so\n      \/\/ I need a typecast to the actual type.\n      String[] queryStrings = (String[])in.readObject();\n      return(queryStrings);\n    } catch(ClassNotFoundException cnfe) {\n      return(null);\n    }\n  }\n}\n<\/p><\/pre>\n
Note: Brought from our old site: http:\/\/www.salearningschool.com\/example_codes\/ on Jan 2nd, 2017 From: http:\/\/sitestree.com\/?p=10264
 Categories:Programming Code Examples, Java\/J2EE\/J2ME, Applets and Basic Graphics
Tags:Java\/J2EE\/J2MEApplets and Basic Graphics
 Post Data:2017-01-02 16:04:28<\/p>\n
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import java.net.*; import java.io.*; \/** When this class is built, it returns a value * immediately, but this value returns false for isDone * and null for getQueries. Meanwhile, it starts a Thread * to request an array of query strings from the server, * reading them in one fell swoop by means of an … <\/p>\n
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Meanwhile, it starts a Thread \u00a0*\u00a0 to request an array of query strings from the server, \u00a0*\u00a0 reading them in one fell\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 . 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