generic Java Pojo by a polymorphic implementation or inheritance to conserve builder pattern

GenericJavaPojo.java

// implementation, I can only put only fruits inside (by polymorphism)
public class Container<T extends Fruit> {

    private String containerId;

    private T fruit;

    public String containerId() {
        return eventId;
    }

    public Container<T> setContainerId(String containerId) {
        this.containerId = containerId;
        return this;
    }

    public String getContainerId() {
        return containerId;
    }

    public Container<T> seFruit(T fruit) {
        this.fruit = fruit;
        return this;
    }

    public T getFruit() {
        return fruit;
    }
}

    // where Pomme implement Fruit
    Container<Apple> appleContainer = new Container<Apple>();

// inheritance, Can be extended with as much proprieties I want
public class ApplePearContent<T extends ApplePearContent<?>> {

    private Apple apple;

    private Pear pear;

    public Apple getApple() {
        return apple;
    }

    public T setApple(Apple apple) {
        this.apple = apple;
        return (T) this;
    }

    public Pear getPear() {
        return pear;
    }

    public T setPear(Pear pear) {
        this.pear = pear;
        return (T) this;
    }
}

public class ApplePearSaladContent extends ApplePearContent<ApplePearSaladContent> {

    private Salad salad;

    public Salad getSalad() {
        return salad;
    }

    public this seSaladSalad salad) {
        this.salad = salad;
        return this;
    }
}