How to use Builder pattern as described by Joshua Bloch's version in my ModelInput class?

Question

I am trying to use Builder Pattern for my below class.. Initially I was using constructor of my class to set all the parameters but accidentally I came across Builder pattern an

Answer 1

try this

public final class ModelInput {
    ...

    public static class Builder {
        private long userid;
        ...

        public Builder setUserId(long userId) {
            this.userId = userId;
        }
        ...

        public ModelInput build() {
            return new ModelInput(userId,...
        }
    }
}