麻烦三个运营商

时间:2013-11-10 18:34:23

标签: java operators

问题是我的if声明。我正在比较所有相同类型的三个值,但我得到一个错误,像这样“参数类型==未定义类型boolean,int”事情是,如果我更改我的代码以使用&amp分别比较值;& .. so value == value1&& value = value2,我没有收到错误。有什么区别?

Card[] cardsIn = cards;
    boolean threeOfAKindEval = false;
    //the for loops runs through every possible combination of the 5 card array.  It starts at
    //0,0,0 and ends at 5,5,5/  Inside  the last for loop, I check for a three of a kind
    //My if statement also checks to make sure I am not comparing the same card with
    //itself three times 
    for(int index = 0; index < cards.length; index++){
        for(int indexCheck = 0; indexCheck < cards.length;indexCheck++){
            for(int indexCheckThree = 0; indexCheckThree < cards.length; 
                    indexCheckThree++){
                if(cardsIn[index].getValue() == cardsIn[indexCheck].getValue()  == cardsIn[indexCheckThree].getValue())
                    threeOfAKindEval = true;
            }
        }
    }

3 个答案:

答案 0 :(得分:2)

您的代码需要在此处修改为傻瓜:

if(cardsIn[index].getValue() == cardsIn[indexCheck].getValue() &&  cardsIn[index].getValue()  == cardsIn[indexCheckThree].getValue())

现在它应该工作

答案 1 :(得分:2)

==比较两个相同类型的参数并返回一个布尔结果。

  cardsIn[index].getValue() == cardsIn[indexCheck].getValue()  == cardsIn[indexCheckThree].getValue())

评估为

  bool temporalBool = cardsIn[indexCheck].getValue()  == cardsIn[indexCheckThree].getValue())
  bool finalBool = cardsIn[indexCheck].getValue()  == temporalBool // <-- left side int, right side bool

&&运算符执行布尔类型的逻辑AND,因此它就是您所需要的。

 cardsIn[index].getValue() == cardsIn[indexCheck].getValue()  && cardsIn[index].getValue() == cardsIn[indexCheckThree].getValue()

评估为

 bool temporalBool1 = cardsIn[index].getValue() == cardsIn[indexCheckThree].getValue()
 bool temporalBool2 = cardsIn[index].getValue() == cardsIn[indexCheck].getValue()  
 bool result = temporalBool1 && temporalBool2

答案 2 :(得分:0)

您的代码需要在此处修改为傻瓜:

if(cardsIn[index].getValue() == cardsIn[indexCheck].getValue() &&  cardsIn[index].getValue()  == cardsIn[indexCheckThree].getValue())

现在它应该工作

代码

if(cardsIn[index].getValue() == cardsIn[indexCheck].getValue()  == cardsIn[indexCheckThree].getValue())

首先比较返回一个布尔值(true/false)并再次将该布尔值与一个整数值进行比较,以表明您收到此错误的原因