Sort with method reference

/*from  w w w . jav  a 2s .c o  m*/
import static java.util.Comparator.comparing;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class Main {

    public static void main(String...args){
        List<Apple> inventory = new ArrayList<>();
        inventory.addAll(Arrays.asList(new Apple(80,"green"), new Apple(155, "green"), new Apple(120, "red")));

        inventory.sort(comparing(Apple::getWeight));
        System.out.println(inventory); 
    }
}
class Apple {
  private Integer weight = 0;
  private String color = "";

  public Apple(Integer weight, String color){
      this.weight = weight;
      this.color = color;
  }
  public Integer getWeight() {
      return weight;
  }
  public void setWeight(Integer weight) {
      this.weight = weight;
  }
  public String getColor() {
      return color;
  }
  public void setColor(String color) {
      this.color = color;
  }
  public String toString() {
      return "Apple{" +
             "color='" + color + '\'' +
             ", weight=" + weight +
             '}';
  }
}