Java SE 1.3，不能使用泛型。 我用于存储/检索自定义对象的解决方案可以吗？

Question

I have a custom class called Log. I can't create an arraylist of logs because I can't use generics. So, I create a standard arraylist (type object) and commit all of my "logs" to it. Then, when iterating over the arraylist later I simply cast "outcoming" objects as logs. ie

Log log = (Log) it.next();

Im not sure if this will work... or even if it does if it's the best idea. Really appreciate any feedback!

Answer 1

Yes it will work.

In order to be in the safer side you can check whether the object is of type Log using instanceof operator.

Ex

Object obj = it.next();
if( obj instanceof Log){
    Log log = (Log) obj;
    // Do something
} else {
    //Log a warning or error message
}