Using Java8 Streams to create a list of objects from another two lists

Question

I have the following Java6 and Java8 code:

List lst1 = // a list of ObjectType1 objects
List lst2 = // a list of Object         


        

Answer 1

I haven't found a way to update 1 stream to another, however, I accomplished a similar feat using a Map. :)

    Map result = new HashMap<>();
    for(int index = 100; index > 0; index--){
        result.put(index, String.valueOf(index));
    }
    result.keySet().stream()
            .filter(key -> key%3 == 0)
            .sorted()
            .forEach(key -> result.put(key, "Fizz"));

    result.keySet().stream()
            .filter(key -> key%5 == 0)
            .sorted()
            .forEach(key -> result.put(key, "Buzz"));

    result.keySet().stream()
            .filter(key -> key%3 == 0 && key%5 == 0)
            .sorted()
            .forEach(key -> result.put(key, "FizzBuzz"));

    result.keySet().stream().forEach(key -> System.out.println(result.get(key)));