TotalAmount.java

package edu.mama.ls16.homework;
import java.math.BigDecimal;
/
TotalAmount类用于统计
*/

public class TotalAmount {
private BigDecimal number; //数量
private BigDecimal amount; //金额

public TotalAmount(BigDecimal number, BigDecimal amount) {<br />        this.number = number;<br />        this.amount = amount;<br />    }<br />    public TotalAmount(String number, String amount) {<br />        this.number = new BigDecimal(number);<br />        this.amount = new BigDecimal(amount);<br />    }
public BigDecimal getNumber() {<br />        return number;<br />    }
public BigDecimal getAmount() {<br />        return amount;<br />    }
public TotalAmount add(TotalAmount augend){<br />        return new TotalAmount(this.number.add(augend.getNumber()),this.amount.add(augend.getAmount()));<br />    }
//以sep为分隔符，将TotalAmount内容拼接成字符串<br />    public String toString(String sep) {<br />        StringBuilder sb=new StringBuilder();<br />        sb.append(this.number.toString()).append(sep);<br />        sb.append(this.amount.toString());<br />        return sb.toString();<br />    }<br />}