convert java8 to milliseconds

java-dates/src/main/java/com/baeldung/convert/ConvertDateTime.java

@@ -0,0 +1,33 @@
+package com.baeldung.convert;
+
+import org.joda.time.DateTime;
+import org.joda.time.format.DateTimeFormat;
+import org.joda.time.format.DateTimeFormatter;
+
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.time.ZonedDateTime;
+
+public class ConvertDateTime {
+
+    public static void main(String[] args) {
+
+        java8();
+        joda();
+    }
+
+    private static void joda() {
+        String s = "00:00:01.2";
+        DateTimeFormatter format = DateTimeFormat.forPattern("HH:mm:ss.S");
+        DateTime dateTime = format.parseDateTime(s);
+        System.out.println(dateTime.getMillisOfSecond());
+    }
+
+    private static void java8() {
+        LocalDateTime localDateTime = LocalDateTime.now();
+
+        ZoneId id = ZoneId.systemDefault();
+        ZonedDateTime zdt = ZonedDateTime.of(localDateTime, id);
+        System.out.println(zdt.toInstant().toEpochMilli());
+    }
+}