added jgraph lib files

Assignment-3/Test/jg.java

@@ -0,0 +1,38 @@
+
+import org.jgrapht.*;
+import org.jgrapht.graph.*;
+import org.jgrapht.nio.*;
+import org.jgrapht.nio.dot.*;
+import org.jgrapht.traverse.*;
+
+import java.io.*;
+import java.net.*;
+import java.util.*;
+
+public class jg {
+    public static void main(String[] args) throws Exception {
+        System.out.println("we are in");
+        // --- JGRAPH TEST (Simplified and Corrected) ---
+        Graph<URI, DefaultEdge> g = new DefaultDirectedGraph<>(DefaultEdge.class);
+        URI google = new URI("http://www.google.com");
+        URI wikipedia = new URI("http://www.wikipedia.org");
+        URI jgrapht = new URI("http://www.jgrapht.org");
+
+        g.addVertex(google);
+        g.addVertex(wikipedia);
+        g.addVertex(jgrapht);
+
+        g.addEdge(jgrapht, wikipedia);
+        g.addEdge(google, jgrapht);
+
+        // Fixed the variable name from hrefGraph to g
+        URI start = g.vertexSet().stream()
+                .filter(uri -> uri.getHost().equals("www.jgrapht.org")).findAny()
+                .get();
+
+        System.out.println("\n--- JGraphT Sample Test Output ---");
+        System.out.println("Found start URI: " + start);
+
+    }
+
+}