Agfdhyk

I am new to java and I would really appreciate some suggestions.

I have these 2 classes:

public class Value {

    public Integer importance;

    public Float price;

    public String name;

}



public class Attribute {

    public String type;

    public String name;

    public Value value;

}

Now I have this ArrayList of Attribute objects:

ArrayList<Attribute> attributes

What I want is to deep copy elements (not only references) in attributes into this other ArrayList:

ArrayList<Attribute> newAttributes

I saw that this isn't working:

for(Attribute attribute : atributes) {

        newAtributes.add(attribute);

}

What should I do?

First you have create copy of the object using Cloneable or Copy Constructor:

public class Value {

    public Integer importance;

    public Float price;

    public String name;



    public Value(Value value) {

        importance = value.importance;

        price = value.price;

        name = value.name;

    } 

}



public class Attribute {

    public String type;

    public String name;

    public Value value;



    public Attribute(Attribute attribute) {

        type = attribute.type;

        name = attribute.name;

        value = new Value(attribute.value);

    }

}

Now you're ready to create deep array copy:

List<Attribute> attributes = new ArrayList<>();

List<Attribute> newAttributes = attributes.stream().map(attribute -> new Attribute(attribute)).collect(Collector.toList());