Examples of java.net.URL.openConnection()

java.net.URL.openConnection()
Returns a URLConnection object that represents a connection to the remote object referred to by the URL.
A new connection is opened every time by calling the openConnection method of the protocol handler for this URL.
If for the URL's protocol (such as HTTP or JAR), there exists a public, specialized URLConnection subclass belonging to one of the following packages or one of their subpackages: java.lang, java.io, java.util, java.net, the connection returned will be of that subclass. For example, for HTTP an HttpURLConnection will be returned, and for JAR a JarURLConnection will be returned. @return a URLConnection to the URL. @exception IOException if an I/O exception occurs. @see java.net.URL#URL(java.lang.String,java.lang.String,int,java.lang.String) @see java.net.URLConnection @see java.net.URLStreamHandler#openConnection(java.net.URL)

      try {
    String resourceName = toResourceName(toBundleName(baseName, locale), format);
    URL url = loader.getResource(resourceName);
    if (url != null) {
        long lastModified = 0;
        URLConnection connection = url.openConnection();
        if (connection != null) {
      // disable caches to get the correct data
      connection.setUseCaches(false);
      if (connection instanceof JarURLConnection) {
          JarEntry ent = ((JarURLConnection)connection).getJarEntry();

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        InputStream is = null;
        BufferedReader br = null;
        try
        {
            // Open the URL and read to our specified line
            URLConnection uc = url.openConnection();
            is = uc.getInputStream();
            br = new BufferedReader(new InputStreamReader(is));


            // Not the most efficient way, but it works
            // (Feel free to patch to seek to the appropriate line)

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  Permission p;
  URLConnection urlConnection;


  try {
      urlConnection = url.openConnection();
      p = urlConnection.getPermission();
  } catch (java.io.IOException ioe) {
      p = null;
      urlConnection = null;
  }

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            }


            // got url, open it
            URLConnection urlConnection = null;
            try {
                urlConnection = url.openConnection();
            } catch (IOException e) {
                throw new IllegalStateException("Cannot open connection on the URL '" + url + "'.", e);
            }
            urlConnection.setDefaultUseCaches(false);

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          url = new URL(newUrlStr);
        }
      }
    }
    
    conn = url.openConnection();
    
    // TODO: why does Java do this with relative file URLs, like file://samplemedia/safexmas.mov
    // it turns this into ftp://samplemedia/safexmas.mov
    // very strange.
    // typically sun.net.www.protocol.ftp.FtpURLConnection

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        BufferedReader rd;
        String line;
        StringBuilder result = new StringBuilder();
        try {
           url = new URL(urlToRead);
           conn = (HttpURLConnection) url.openConnection();
           conn.setRequestMethod("GET");
           rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
           while ((line = rd.readLine()) != null) {
              result.append(line);
           }

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  /* check if there is a Tomcat connection to the server */
  private static boolean isServerStarted(String host) throws MalformedURLException {
    // URL to Tomcat 
    URL url = new URL("http", host, 8080, "/") ;
    try {
      URLConnection conn = url.openConnection() ;
      if (conn instanceof HttpURLConnection) {
        HttpURLConnection http = (HttpURLConnection) conn ;
        int responseCode = http.getResponseCode();
        
        if (responseCode > 0 && responseCode < 400) {

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                .getType("article"));
            entry.setField("citeseerurl", id);


            try {
                URL citeseerUrl = new URL(OAI_URL + id);
                HttpURLConnection citeseerConnection = (HttpURLConnection) citeseerUrl
                    .openConnection();
                InputStream inputStream = citeseerConnection.getInputStream();


                DefaultHandler handlerBase = new CiteSeerEntryFetcherHandler(entry);

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    {
      LoginState state = null;
    String url = this.buildUrl(user, img);
    try {
          URL doUrl = new URL(url);
          HttpsURLConnection conn = (HttpsURLConnection) doUrl.openConnection();
          int status = conn.getResponseCode();
          logger.debug("SSISignV4:status="+status);
          
          switch(status){

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            }
      System.out.println(url);
      try {
              URL trueURL = new URL(url);
              logger.info("Sending crush report...");
              HttpURLConnection conn = (HttpURLConnection) trueURL.openConnection();
              if(conn.getResponseCode()==200) {
                logger.info("Send crush report OK.");
              }else {
                logger.info("Send crush report Failed. status="+conn.getResponseCode()+" "+conn.getResponseMessage());
              }

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