'Matching Java timestamp code to javascript

I have this code which showing sets the timestamp to be in a specific format written in

Java:

timeStamp = System.currentTimeMillis();
writer.write(String.format("%d, %f, %s\n", timeStamp, evt.values[1], otherstr ));

I am using javascript so I need to translate it.

I currently have this:

const timeStamp = + new Date();
console.log(timeStamp);

I can't test the Java one as I don't know Java so I'm asking here.

Would my javascript code match the Java timestamp?

If not, how can I match it in Javascript?

Sources

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