以下这段for嵌套循环怎么用java8 lambda写？

Question

ArrayList<String> messages = new ArrayList<String>();
String dot;
for(int i=0;i<10;i++){
    dot = "";
    for(int j=0;j<=i;j++) {
        dot = dot + ".";
    }
    messages.add("message" + dot);
} 

Answer 1

public static void main(String[] args) { final String message = "message"; List<String> messages = IntStream.range(1, 11).mapToObj(i -> { char[] chars = new char[i]; Arrays.fill(chars, '.'); return message + String.valueOf(chars); }).collect(Collectors.toList()); System.out.println(message); }