public class OrderBean implements WritableComparable<OrderBean> {

    private Integer order_id; //整数用 writeInt()和readInt()

    private String pdt;   //文本类型 用 writeUTF()和readUTF()

    private Double price; //浮点数用 writeDouble()和readDouble()

    @Override

    public void write(DataOutput dataOutput) throws IOException {

        dataOutput.writeInt(order_id);

        dataOutput.writeUTF(pdt);

        dataOutput.writeDouble(price);

    }

    @Override

    public void readFields(DataInput dataInput) throws IOException {

        this.order_id=dataInput.readInt();

        this.pdt=dataInput.readUTF();

        this.price=dataInput.readDouble();

    }

    @Override

    public String toString() {

        return order_id+"\t"+pdt+"\t"+price;

    }

    @Override

    public int compareTo(OrderBean o) {

        int i = Integer.compare(order_id,o.getOrder_id());

        if (i!=0)

            return i;

        return Double.compare(o.getPrice(),price);

    }

    public Integer getOrder_id() {

        return order_id;

    }

    public void setOrder_id(Integer order_id) {

        this.order_id = order_id;

    }

    public Double getPrice() {

        return price;

    }

    public void setPrice(Double price) {

        this.price = price;

    }

    public String getPdt() {

        return pdt;

    }

    public void setPdt(String pdt) {

        this.pdt = pdt;

    }

}