Difference between url and uri bael 864 hariprasad net (#2108)

* BAEL-864, java.net.*

* java-networking Bael-864, revision

* Final and static keywords removed.

* Bael-486 Static import for JUnit into pom.xml was added.

* Bael-486, pom.xml was renamed on networking-pom.xml to deactivate it.

* Maven pom.xml changed.

* Delete java-networing project.

* Bael-684, rearanged.

core-java/src/main/java/com/baeldung/javanetworking/url/URLDemo.java

@@ -0,0 +1,69 @@
+package com.baeldung.javanetworking.url;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.net.URLConnection;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class URLDemo {
+    private static Logger log = LoggerFactory.getLogger(URLDemo.class);
+
+    String URLSTRING = "https://wordpress.org:443/support/topic/page-jumps-within-wordpress/?replies=3#post-2278484";
+    // parsed locator
+    String URLPROTOCOL = "https";
+    // final static String URLAUTHORITY = "wordpress.org:443";
+    String URLHOST = "wordpress.org";
+    String URLPATH = "/support/topic/page-jumps-within-wordpress/";
+    // final static String URLFILENAME = "/support/topic/page-jumps-within-wordpress/?replies=3";
+    // final static int URLPORT = 443;
+    int URLDEFAULTPORT = 443;
+    String URLQUERY = "replies=3";
+    String URLREFERENCE = "post-2278484";
+    String URLCOMPOUND = URLPROTOCOL + "://" + URLHOST + ":" + URLDEFAULTPORT + URLPATH + "?" + URLQUERY + "#" + URLREFERENCE;
+
+    URL url;
+    URLConnection urlConnection = null;
+    HttpURLConnection connection = null;
+    BufferedReader in = null;
+    String urlContent = "";
+
+    public String testURL(String urlString) throws IOException, IllegalArgumentException {
+        String urlStringCont = "";
+        // comment the if clause if experiment with URL
+        /*if (!URLSTRING.equals(urlString)) {
+            throw new IllegalArgumentException("URL String argument is not proper: " + urlString);
+        }*/
+        // creating URL object
+        url = new URL(urlString);
+        // get URL connection
+        urlConnection = url.openConnection();
+        connection = null;
+        // we can check, if connection is proper type
+        if (urlConnection instanceof HttpURLConnection) {
+            connection = (HttpURLConnection) urlConnection;
+        } else {
+            log.info("Please enter an HTTP URL");
+            throw new IOException("HTTP URL is not correct");
+        }
+        // we can check response code (200 OK is expected)
+        log.info(connection.getResponseCode() + " " + connection.getResponseMessage());
+        in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
+        String current;
+
+        while ((current = in.readLine()) != null) {
+            urlStringCont += current;
+        }
+        return urlStringCont;
+    }
+
+    public static void main(String[] args) throws Exception {
+        URLDemo demo = new URLDemo();
+        String content = demo.testURL(demo.URLCOMPOUND);
+        log.info(content);
+    }
+}

core-java/src/main/java/log4j.properties

@@ -0,0 +1,9 @@
+# Set root logger level to DEBUG and its only appender to A1.
+log4j.rootLogger=DEBUG, A1
+
+# A1 is set to be a ConsoleAppender.
+log4j.appender.A1=org.apache.log4j.ConsoleAppender
+
+# A1 uses PatternLayout.
+log4j.appender.A1.layout=org.apache.log4j.PatternLayout
+log4j.appender.A1.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n