错误:没有'if - Cant find solution‘的'else’

Question

//我知道坐标不正确，我会在编译后再修复它们，但我不明白为什么它总是给我这样的信息

public class DiceRoller
Public static void main(String[] args
{



 if (dice1 == 1)

            StdDraw.square(.5, .4, .2);
            StdDraw.circle(.3, .5, .035);

         else if (dice1 == 2)

            StdDraw.square(.5, .4, .2);
            StdDraw.circle(.3, .45, .035);
            StdDraw.circle(.3, .55, .035);

         else if (dice1 == 3)

            StdDraw.square(.5, .4, .2);
            StdDraw.circle(.3, .55, .035);
            StdDraw.circle(.3, .45, .035);
            StdDraw.circle(.3, .50, .035);

         else if (dice1 == 4)

            StdDraw.square(.5, .4, .2);
            StdDraw.circle(.25, .55, .035);
            StdDraw.circle(.25, .40, .035);
            StdDraw.circle(.75, .55, .035);
            StdDraw.circle(.75, .40, .035);

         else if (dice1 == 5)

            StdDraw.square(.5, .4, .2);
            StdDraw.circle(.25, .55, .035);
            StdDraw.circle(.25, .40, .035);
            StdDraw.circle(.75, .55, .035);
            StdDraw.circle(.75, .55, .035);
            StdDraw.circle(.3, .5, .035);

         else if (dice1 == 6)

            StdDraw.square(.5, .4, .2);
            StdDraw.circle(.25, .50, .035);
            StdDraw.circle(.25, .60, .035);
            StdDraw.circle(.25, .40, .035);
            StdDraw.circle(.75, .60, .035);
            StdDraw.circle(.75, .40, .035);
            StdDraw.circle(.75, .50, .035);

         if (dice2 == 1)

            StdDraw.square(.5, .7, .2);
            StdDraw.circle(.3, .5, .035);

         else if (dice2 == 2)

            StdDraw.square(.5, .7, .2);
            StdDraw.circle(.3, .45, .035);
            StdDraw.circle(.3, .55, .035);

         else if (dice2 == 3)

            StdDraw.square(.5, .7, .2);
            StdDraw.circle(.3, .55, .035);
            StdDraw.circle(.3, .45, .035);
            StdDraw.circle(.3, .50, .035);
         else if (dice2 == 4)

            StdDraw.square(.5, .7, .2);
            StdDraw.circle(.25, .55, .035);
            StdDraw.circle(.25, .40, .035);
            StdDraw.circle(.75, .55, .035);
            StdDraw.circle(.75, .40, .035);

         else if (dice2 == 5)

            StdDraw.square(.5, .7, .2);
            StdDraw.circle(.25, .55, .035);
            StdDraw.circle(.25, .40, .035);
            StdDraw.circle(.75, .55, .035);
            StdDraw.circle(.75, .55, .035);
            StdDraw.circle(.3, .5, .035);

         else if (dice2 == 6)
            StdDraw.square(.5, .7, .2);
            StdDraw.circle(.25, .50, .035);
            StdDraw.circle(.25, .60, .035);
            StdDraw.circle(.25, .40, .035);
            StdDraw.circle(.75, .60, .035);
            StdDraw.circle(.75, .40, .035);
            StdDraw.circle(.75, .50, .035);
           }

Answer 1

您需要将您的if放入括号{}中，如下所示：

if (dice1 == 2)
{    //should be enclosed since there are more than one statement to be executed
            StdDraw.square(.5, .4, .2);
            StdDraw.circle(.3, .45, .035);
            StdDraw.circle(.3, .55, .035);
}

Answer 2

错误:没有'if‘的'else’

if (dice1 == 1)
{
            StdDraw.square(.5, .4, .2);
            StdDraw.circle(.3, .5, .035);
}
         else if (dice1 == 2)
{
            StdDraw.square(.5, .4, .2);
            StdDraw.circle(.3, .45, .035);
            StdDraw.circle(.3, .55, .035);
}
................

应该放在大括号里。因为它包含多个语句。

Answer 3

用大括号开始和结束每个if和else-if语句