refactoring - migrate from Joda time library to Java time (Java 8) -

our software architect made decision remove joda time library our project dependencies , use features of java 8 time. doing research of our project , trying find places using joda time lib , determine using (joda localdate, datetime, etc.).
not expert of joda time library , not expert of java 8 time, have questions:
in code saw lot of places this:

datetime jodadatetime = new datetime(); dosomething(jodadatetime.todate());  

i little bit confused.

(q1) make sense use joda datetime in particular case? believe, can use classic java.util.date , not need joda:

java.util.date date = new date(); dosomething(date); 

correct?

also, saw piece of code:

org.joda.time.datetime jodadatetime = new datetime(); org.joda.time.datetime jodadatetimeinpast = jodadatetime.minusseconds(60); dosomething(jodadatetimeinpast.todate()); 

i think, java 8 time api provides great support calculating dates in past, have idea how replace piece of code above java 8:

localdatetime java8datetime = localdatetime.now(); localdatetime java8datetimeinpast = java8datetime.minusseconds(60); date java8date = date.from(java8datetimeinpast.atzone(zoneid.systemdefault()).toinstant()); dosomething(java8date); 

(q2) have done in right way? not sure on 100%. found link table: "converting joda-time java.time" there found info, need use java.time.zoneddatetime or java.time.offsetdatetime classes, not java.time.localdatetime, because localdatetime -

same concept - date , time without time-zone

please confirm refactoring correct (for q1 , q2).

most questions conversion should handled blog on topic.

q1a: there no point in creating joda-time object change java.util.date. however, method should probbaly take instant or zoneddatetime:

instant instant = instant.now(); dosomething(instant);  // method changed take instant 

note instant closest match java.util.date.

q1b: case involves time-zone, should use zoneddatetime.

zoneddatetime java8datetime = zoneddatetime.now();  // uses zoneid.systemdefault() zoneddatetime java8datetimeinpast = java8datetime.minusseconds(60); dosomething(java8datetimeinpast.toinstant()); 

again, assumes dosomething changed take instant.

the key using java.time think data type correct each piece of data.

• just date? use localdate
• just time? use localtime
• date, time , time-zone? use zoneddatetime
• just timestamp no other info? use instant
• a network date-time format offset (not zone)? use offsetdatetime.