Question

I have a simple question regarding java generics. How do I construct a generic class?
I have this class :

public class SearchResult<T extends Model> {

    public List<T> results ;

    public Integer count ;

    public SearchResult(List<T> results, Integer count){
        this.results = results;
        this.count = count ;
    }
}

Now i would like to create a new instance is SearchResult but then when i do this i get an error . SearchResult result = new SearchResult<MyModel>(myListOfMyModels, mycount);

Answer 1

Your class definition should look like

public class SearchResult<T> {

    public List<T> results ;

    public Integer count ;

    public SearchResult(List<T> results, Integer count){
        this.results = results;
        this.count = count ;
    }
}

Then:

SearchResult result = new SearchResult<String>(myListOfStrings, mycount);

I’m assuming that since myListOfStrings appears to be a string, you need to define T as a String