Add sample code to get current timestamp in Java 8

core-java-8/src/main/java/com/baeldung/util/GetCurrentTimestamp.java

@@ -0,0 +1,14 @@
+package com.baeldung.util;
+
+import java.time.Instant;
+
+public class GetCurrentTimestamp {
+
+    public static void main(String args[]) {
+        
+        Instant instant = Instant.now();
+        System.out.println("Current timestamp is: " + instant.toEpochMilli());
+
+        System.out.println("Number of seconds: " + instant.getEpochSecond());
+    }
+}