Done with ethernet header

src/Main.java

@@ -1,6 +1,7 @@
+import java.io.File;
 import java.io.IOException;
+import java.math.BigInteger;
 import java.nio.charset.StandardCharsets;
-import java.nio.file.Path;
 import java.util.Scanner;
 
 public class Main {
@@ -15,17 +16,75 @@ public static void main(String[] args) throws IOException {
                 "Total lines for comment= <<value>>\n");
 
         System.out.println("Enter path of input file along with file name: ");
+
+//        G:\Other computers\My Laptop\college document\0 SEM 3\CE 257 DCN\assignment - 1\Header-Extractor\Sample.txt
         Scanner userInput = new Scanner(System.in);
-        String fileName = userInput.nextLine();
-        try {
-            Scanner inputFile = new Scanner(Path.of(fileName),
-                    StandardCharsets.UTF_8);
+        String filePath = userInput.nextLine();
+        File inputFile = new File(filePath);
+        Scanner readInput = new Scanner(inputFile, StandardCharsets.UTF_8);
+        /**
+         * @// TODO: 9/17/2021 Add try and catch for wrong file path.
+         * @// TODO: 9/17/2021 Add how many rows you want to print option.
+         */
 
-        } catch (IOException e) {
-            System.out.println("File does not exists");
-        }
-        String fileData = inputFile.nextLine();
+        String fileData = readInput.nextLine();
         System.out.println(fileData);
+        System.out.println("------------------------------------------\n" +
+                "Output for the row-1\n" +
+                "------------------------------------------\n");
+        //Code for Ethernet Header
+
+        ethernetHeader frame1 = new ethernetHeader(fileData.substring(0,112),fileData.substring(112));
+        System.out.println(frame1.toString());
+    }
+}
+
+class HeaderExtractor{
+    String inputFrameData;
+    public HeaderExtractor(String inputFrameData) {
+        this.inputFrameData = inputFrameData;
+    }
+
+}
+class ethernetHeader implements strBinToStrHex{
+    String headerFrame;
+    String data;
+    String destinationMAC;
+    String sourceMAC;
+    String type;
+
+    public ethernetHeader(String headerFrame, String data) {
+        this.headerFrame = headerFrame;
+        this.data = data;
+        this.destinationMAC = convertStringToHex(headerFrame.substring(0,48));
+        this.sourceMAC= convertStringToHex(headerFrame.substring(48,96));
+        this.type = convertStringToHex(headerFrame.substring(96,112));
+    }
+
+    @Override
+    public String toString() {
+        System.out.println();
+        return "Ethernet Header\n" +
+                "\n" +
+                "\nDestination MAC Address: " + printMAC(destinationMAC)+
+                "\nSource MAC Address: " + printMAC(sourceMAC)+
+                "\nType: " +type;
+    }
+}
 
+interface strBinToStrHex{
+    default String convertStringToHex(String binaryString) {
+        BigInteger decimalVal = new BigInteger(binaryString,2);
+//        this is just to debug the code.
+//        System.out.println("Print decimal value of "+binaryString +" is "+decimalVal);
+        return decimalVal.toString(16);
+    }
+    default String printMAC(String hexValue){
+        StringBuilder MACAddress = new StringBuilder(hexValue);
+        for (int i = 2; i < hexValue.length(); i+= 3) {
+            // insert character value at offset i
+            MACAddress.insert(i, ':');
+        }
+        return String.valueOf(MACAddress);
     }
 }