public static void main(String[] args) {

List<Integer> numbers = Arrays.asList(3, 7, 8, 1, 5, 9);

List<String> words = Arrays.asList("corejava", "spring", "hibernate");

int sum = 0;

for (int no : numbers) {

sum = sum + no;

}

//System.out.println(sum);

int sum1 = (int) numbers.stream().mapToDouble(i -> i).sum();//mapToInt(i -> i).sum();

System.out.println("sum1 "+sum1);

Integer reduceSum = numbers.stream().reduce(0, (a, b) -> a + b);

System.out.println("reduceSum "+reduceSum);

Optional<Integer> reduceSumWithMethodReference = numbers.stream().reduce(Integer::sum);

System.out.println("reduceSumMethod "+reduceSumWithMethodReference.get());

Integer mulResult = numbers.stream().reduce(1, (a, b) -> a * b);

System.out.println("mulResult "+mulResult);

Integer maxvalue = numbers.stream().reduce(0, (a, b) -> a > b ? a : b);

System.out.println("maxvalue "+maxvalue);

Integer maxvalueWithMethodReference = numbers.stream().reduce(Integer::max).get();

System.out.println("maxvalue1 "+maxvalueWithMethodReference);

String longestString = words.stream()

.reduce((word1, word2) -> word1.length() > word2.length() ? word1 : word2)

.get();

System.out.println(longestString);

}

}