Java Currying

public class Foo {

    public static final WithFoo BUILDER = a -> b -> new Foo(a, b);

    public interface WithFoo {
        WithBar withFoo(String foo);
    }

    public interface WithBar {
        Foo withBar(String bar);
    }

    public final String foo;
    public final String bar;

    private Foo(String foo, String bar) {
        this.foo = foo;
        this.bar = bar;
    }
}