JavaPractice/src/main/java/LambdaAndObjects.java at master · memphisJ/JavaPractice

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import com.google.common.collect.Ordering;

import java.time.LocalDateTime;

import java.time.format.DateTimeFormatter;

import java.util.Arrays;

import java.util.List;

import java.util.stream.Collectors;

public class LambdaAndObjects {

public static void main(String...args){

List<String> datesString = Arrays.asList("2018-07-04 10:20 AM","2018-07-02 09:25 PM","2018-07-01 10:50 PM");

datesString.forEach(i-> System.out.println(i));

// Change the datesString into a List<Date>

System.out.println("Print the same values as LocalDate object.");

DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd hh:mm a"); // HH -> 24h if hh 12h

List<LocalDateTime> dates = datesString

.stream()

.map(date -> LocalDateTime.parse(date,formatter))

.collect(Collectors.toList());

dates.forEach(i-> System.out.println(i));

if (Ordering.natural().reverse().isOrdered(dates)) {

System.out.println("The dates are order in descending order.");

} else {

System.out.println("The dates are not order in descending order.");

}

List<String> dateStrings = Arrays.asList("12.10.2016", "13.10.2016", "14.10.2016");

DateTimeFormatter formatter = DateTimeFormatter.ofPattern("dd.MM.yyyy");

List<LocalDate> localDates = dateStrings.stream().map(date -> LocalDate.parse(date, formatter)).collect(Collectors.toList());

System.out.println(localDates); */

}