submit

.idea/misc.xml

@@ -7,4 +7,5 @@
       </list>
     </option>
   </component>
+  <component name="ProjectRootManager" version="2" project-jdk-name="1.8" project-jdk-type="JavaSDK" />
 </project>

src/main/java/Main.java

@@ -0,0 +1,77 @@
+import java.util.Scanner;
+import java.net.URL;
+import java.net.URLConnection;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+
+public class Main{
+
+public static void main(String[] args) {
+    String url;    // The url from the command line or from user input.
+    String urlLC;  // The url transformed to lower case.
+    if (args.length == 0) {
+        Scanner stdin = new Scanner(System.in);
+        System.out.print("Enter a url: ");
+        url = stdin.nextLine();
+    } else {
+        url = args[0];
+    }
+    urlLC = url.toLowerCase();
+    if (!(urlLC.startsWith("http://") || urlLC.startsWith("ftp://") ||
+            urlLC.startsWith("file://"))) {
+        System.out.println("Using: " + url);
+    }
+    System.out.println();
+    try {
+        readTextFromURL(url);
+    } catch (IOException e) {
+        System.out.println("\n*** Sorry, an error has occurred ***\n");
+        System.out.println(e);
+        System.out.println();
+    }
+}
+
+    static void readTextFromURL( String urlString ) throws IOException {
+
+        /* Open a connection to the URL, and get an input stream
+           for reading data from the URL. */
+
+        URL url = new URL(urlString);
+        URLConnection connection = url.openConnection();
+        InputStream urlData = connection.getInputStream();
+
+        /* Check that the content is some type of text.  Note: If
+           getContentType() method were called before getting the input
+           stream, it is possible for contentType to be null only because
+           no connection can be made.  The getInputStream() method will
+           throw an error if no connection can be made. */
+
+        String contentType = connection.getContentType();
+        System.out.println("Stream opened with content type: " + contentType);
+        System.out.println();
+        if (contentType == null || contentType.startsWith("text") == false)
+            throw new IOException("URL does not seem to refer to a text file.");
+        System.out.println("Fetching context from " + urlString + " ...");
+        System.out.println();
+
+        /* Copy lines of text from the input stream to the screen, until
+           end-of-file is encountered  (or an error occurs). */
+
+        BufferedReader in;  // For reading from the connection's input stream.
+        in = new BufferedReader( new InputStreamReader(urlData) );
+
+        while (true) {
+            String line = in.readLine();
+            if (line == null)
+                break;
+            System.out.println(line);
+        }
+        in.close();
+
+    } // end readTextFromURL()
+
+} // end class FetchURL
+
+