OOP design table chair bench

abstract class material{
    int weight;
}
class wood extends material{
}
class plastic extends material{
}
class metal extends material{
}
interface furniture {
    material getMaterial();
    void setMaterial(material m);
}
class table implements furniture{
    material mat;
    public material getMaterial(){
        return mat;
    }
    public void setMaterial(material m){
        mat =m;
    }
}
class bench implements furniture{
    material mat;
    public material getMaterial(){
        return mat;
    }
    public void setMaterial(material m){
        mat =m;
    }
}
class chair implements furniture{
    material mat;
    public material getMaterial(){
        return mat;
    }
    public void setMaterial(material m){
        mat =m;
    }
}

There are 3 products table,chair and bench. Product can be of wood ,metal and plastic . Design a class structures for this.