How to filter a List using Java 8 stream and startwith array of values

You call startsWith on the wrong Strings (for example, you test if "1_".startsWith("1_John") instead of "1_John".startsWith("1_")).

You should stream over nameList and use numberList for the filtering:

List<String> filteredList = 
    nameList.stream()
            .filter(str -> numberList.stream().anyMatch(str::startsWith))
            .collect(Collectors.toList());

P.S. Stream.of(numberList.toArray(new String[0])) is redundant. Use numberList.stream() instead.

As an alternate to Eran's solution, you can also use a combination of removeIf and noneMatch as follows:

List<String> filteredList = new ArrayList<>(nameList);
filteredList.removeIf(str -> numberList.stream().noneMatch(str::startsWith));