Java - Campos de manera aleatoria sin repetirse

public constructorClase(int id ){

    this.ID_producto = id;

    this.ID_almacen1 = (int) Math.floor(Math.random()*(10)+1);

    do{

        this.ID_almacen2 = (int) Math.floor(Math.random()*(10)+1);

    }while (ID_almacen1==ID_almacen2);

    this.Stock = (int) Math.floor(Math.random()*(10)+1);

}

int primero = (int) Math.floor(Math.random()*10+1);

int segundo = (int) Math.floor(Math.random()*9 + primero) % 10 + 1;