So, you mean that the class of content has methods named getLoadContent0, getLoadContent1, getLoadContent2 etc.?
What you want is not directly possible in Java. Sometimes people who are new to programming in Java ask a question like yours because they don't know that Java has arrays and collection classes such as ArrayList and HashMap. So, the solution often is not to create "dynamic variable names", or "dynamic method names", but to use an ArrayList or HashMap to store the data, and then iterate over that using a loop.
If you really want to call methods dynamically, by creating the name at runtime, then that is possible using the reflection API. But almost certainly a better solution is to store the data in a collection class instead of trying to do difficult things via reflection.