public class HelloWorld{

    public static void main(String[] args) {

   String name="爱慕课";

   char sex='男';

      int num=18;

      double price=120.5;

      boolean isOK=true;

System.out.println(name);

System.out.println(sex);

System.out.println(num);

System.out.println(price);

System.out.println(isOK);

}

}

folat感觉挺不错的为什么，这里校验的是double

float改成double