Please explain initialization safety as spelled out in Java memory model

Question

1. Can some one explain initialization safety as required by Java memory model ?
2. How does the final fields help in achieving

Answer 1

1. Initialization safety allows properly constructed immutable objects to be shared safely across threads without using synchronization, irrespective of even if they published using a data race.

2. Objects having final field, initialization safety prevent reordering any part of construction with the initial load of a reference to that object.