java - 无法编译的源代码 - 错误的符号类型 :

Question

第 14 行发生错误。

Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - Erroneous sym type:

很难找到解决方案。

package example;

public class Num
{
    public static void main(String [] args) 
    {
    String s = "42";
        try 
        {
            s = s.concat(".5"); 
            double d = Double.parseDouble(s);
            s = Double.toString(d);
            int x = (int) Math.ceil(Double.valueOf(s).doubleValue()); //Line 14
            System.out.println(x);
        }
        catch (NumberFormatException e) 
        {
            System.out.println("Wrong Number");
        }
    }
}

Answer 1

您提供的代码在我的电脑上运行良好。

我猜您正在使用 Netbeans 并且可能受到错误的影响。试试这个:

Open the project properties, select the Build-Compiling, uncheck "Compile on save" and rerun the application. This will make sure all your source code becomes recompiled before running it.

链接:https://forums.netbeans.org/topic43241.html