package chapter12;

import java.util.function.*;

import java.util.*;

import java.util.stream.*;

public class Sect9a_Ex2

{

public static void main(String[] args)

{

Supplier<List<Character>> supp = () -> new ArrayList<Character>();

BinaryOperator<List<Character>> comb1 = (x,y) -> {

x.addAll(y);

return x;

};

BiConsumer<List<Character>,Character> accc2 = (x,y) -> {

if (Character.isAlphabetic(y))

x.add(0,y);

else

x.add(y);

};

Function<List<Character>,String> fins2 = x -> {

String t="";

for (Character c : x)

t += c;

return t;

};

String t =

Stream.of('1','a','b','2') // Stream<Character>

.collect(Collectors.collectingAndThen(

Collector.of(supp, accc2, comb1), // List<Character>

fins2)); // String

System.out.println(t); // Prints ba12

}

}