Where is the "flux in core" inside soldering wire? I used streams and it works fine with javaFx ListView. To learn more, see our tips on writing great answers. convert list of objects to list of strings and generics Air that escapes from tire smells really bad. Are there ethnically non-Chinese members of the CCP right now? Example: Why add an increment/decrement operator when compound assignnments exist? how to convert from a list of generics to list of objects in java 8? Depending on situation, such as dealing with very large lists, you may just want to convert it - obviously risking mixing two different types of objects in the same list. We can simply convert List<TypeA> to List<TypeB> using the map () method: someList.stream ().map ( .. the conversion logic.. ).collect (Collectors.toList ()); The " .. the conversion logic .. " above can be a method reference or a lambda expression. Now I want a method which will take the List ReadFile from above to somehow split the arrays of strings into an ID which will be the first element "A", "B", "C" and another part which would be the string array of numbers which I will put through another method to convert numbers from String to type Double. Because of type erasure, a List is a List