Question

I’ve created an “Attribut” class which is just a wrapper for a key/value single item. I know that Maps and HashMaps are designed for lists of this kind of items so I feel like i reinvented the wheel…
Is there some Class which fulfill this purpose ?

Regards

( My code to be clear about what i’m looking for )

public class Attribut {
    private int id;
    private String value;
    @Override
    public String toString() {
        return value;
    }
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getValue() {
        return value;
    }
    public void setValue(String value) {
        this.value = value;
    }
}

Answer 1

You can use AbstractMap.SimpleEntry. There is also a SimpleImmutableEntry.

However, I believe that it is not wrong designing your own type. There is a plethora of examples in the JDK itself where something like this (tuple) has been done:

• java.awt.Dimension
• java.awt.Point

I believe that it’s a good thing, since you’re code is more easily readable and you gain additional type safety.