每日一题(18)解析与暂别

public class Question18 {
    public static void main(String[] args){
        String str = new String("test");
        System.out.print(str.toString());
    }
}

class String {
    private final java.lang.String str;

    String(java.lang.String str){
        this.str = str;
    }

    @Override
   public java.lang.String toString(){
       return str;
   }
}
//out
Exception in thread "main" java.lang.NosuchMethodError: main