为啥报错了

public class HelloWorld{

    public static void main(String[] args) {

      name="爱慕课";

      sex='男';

      num=18;

      price=120.5;

      isOK=true;

System.out.println(name);

System.out.println(sex);

System.out.println(num);

System.out.println(price);

System.out.println(isOK);

}

}