问题描述
我用 Java 编写了一个函数,我希望这个函数返回多个值.除了使用数组和结构体,有没有办法返回多个值?
I wrote a function in Java and I want this function to return multiple values. Except use of array and structure, is there a way to return multiple values?
我的代码:
String query40 = "SELECT Good_Name,Quantity,Price from Tbl1 where Good_ID="+x; Cursor c = db.rawQuery(query, null); if (c!= null && c.moveToFirst()) { GoodNameShow = c.getString(0); QuantityShow = c.getLong(1); GoodUnitPriceShow = c.getLong(2); return GoodNameShow,QuantityShow ,GoodUnitPriceShow ; }
推荐答案
在Java中,当你想让一个函数返回多个值时,你必须
In Java, when you want a function to return multiple values, you must
- 将这些值嵌入到您返回的对象中
- 或更改传递给您的函数的对象
在您的情况下,您显然需要定义一个类 Show,它可以具有字段 name、quantity 和 price代码>:
In your case, you clearly need to define a class Show which could have fields name, quantity and price :
public class Show { private String name; private int price; // add other fields, constructor and accessors }
然后将您的功能更改为
public Show test(){ ... return new Show(GoodNameShow,QuantityShow ,GoodUnitPriceShow) ;