Lazy field initialization with lambdas

Question

I would like to implement lazy field initialization (or deferred initialization) without an if statement and taking advantage of lambdas. So, I would like to have the same b

Answer 1

How about this. Some J8 functional switcheroos to avoid ifs on each access. Warning: not thread aware.

import java.util.function.Supplier;

public class Lazy {
    private T obj;
    private Supplier creator;
    private Supplier fieldAccessor = () -> obj;
    private Supplier initialGetter = () -> {
        obj = creator.get();
        creator = null;
        initialGetter = null;
        getter = fieldAccessor;
        return obj;
    };
    private Supplier getter = initialGetter;

    public Lazy(Supplier creator) {
        this.creator = creator;
    }

    public T get() {
        return getter.get();
    }

}