When would you use the Builder Pattern? [closed]

BuildOrderHeaderRow()
BuildLineItemSubHeaderRow()
BuildOrderRow()
BuildLineItemSubRow()

Pizza(int size) { ... }
Pizza(int size, boolean cheese) { ... }
Pizza(int size, boolean cheese, boolean pepperoni) { ... }
Pizza(int size, boolean cheese, boolean pepperoni, boolean bacon) { ... }

Pizza pizza = new Pizza(12);
pizza.setCheese(true);
pizza.setPepperoni(true);
pizza.setBacon(true);

public class Pizza {
  private int size;
  private boolean cheese;
  private boolean pepperoni;
  private boolean bacon;

  public static class Builder {
    //required
    private final int size;

    //optional
    private boolean cheese = false;
    private boolean pepperoni = false;
    private boolean bacon = false;

    public Builder(int size) {
      this.size = size;
    }

    public Builder cheese(boolean value) {
      cheese = value;
      return this;
    }

    public Builder pepperoni(boolean value) {
      pepperoni = value;
      return this;
    }

    public Builder bacon(boolean value) {
      bacon = value;
      return this;
    }

    public Pizza build() {
      return new Pizza(this);
    }
  }

  private Pizza(Builder builder) {
    size = builder.size;
    cheese = builder.cheese;
    pepperoni = builder.pepperoni;
    bacon = builder.bacon;
  }
}

Pizza pizza = new Pizza.Builder(12).cheese(true).pepperoni(true).bacon(true).build();

m.expects(once())
    .method("testMethod")
    .with(eq(1), eq(2))
    .returns("someResponse");

Map<String, Integer> m = new HashMap<String, Integer>()
    .put("a", 1)
    .put("b", 2)
    .put("c", 3);

class RestaurantObjectBuilder
{
   IFactory _factory = new DefaultFoodFactory();

   //This can be used when you want to plugin the
   public void SetFoodFactory(IFactory customFactory)
   {
        _factory = customFactory;
   }

   public IFactory GetFoodFactory()
   {
      return _factory;
   }
}

class RestaurantObjectBuilder
{
   IFactory _factory = new DefaultFoodFactory();

   //This can be used when you want to plugin the
   public void SetFoodFactory(IFactory customFactory)
   {
        _factory = customFactory;
   }

   public IFactory GetFoodFactory()
   {
      return _factory;
   }
}