一直提示我无法找到主类，但是我用editplus运行没问题，醉了，求解答

public class HelloWorld{

    public static void main(String[] args){

        String subjects[] = new String[5];

subjects[0] = "Oracle";

subjects[1] = "PHP";

subjects[2] = "Linux";

subjects[3] = "Java";

subjects[4] = "HTML";

        System.out.println("数组中第4个科目为："+subjects[3]);

    }

}