Suranchiyev

package coding;

public class PrimeNumber {
    public static void main(String[] args) {
        System.out.println(isPrime(29)); // true
        System.out.println(isPrime(35)); // false
        System.out.println(isPrime(20)); // false
        System.out.println(isPrime(27)); // false
        System.out.println(isPrime(7)); // true
    }

Suranchiyev

import java.time.Duration;
import java.time.Instant;

public class Main {
    public static void main(String[] args) {
        // get specific moment time in the beginning
        Instant start = Instant.now();

        for (int i = 0; i < 1000; i++) {
            System.out.println("Hello, World!");

Suranchiyev

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class Main {
    public static void main(String[] args) {
        String str = "Welcome, today date & time: July 15, 2021 - 10:05 AM";
        // get date & time part from String
        String dateStr = str.split("time:")[1].trim();
        // Print String date & time
        System.out.println(dateStr); // July 15, 2021 - 10:05 AM

Suranchiyev

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class Main {
    public static void main(String[] args) {
        LocalDateTime dateTime = LocalDateTime.of(1996, 03, 26, 19, 0);
        System.out.println(dateTime); // 1996-03-26T19:00

        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("MMM dd, YYYY - hh:mm a");
        String dateTimeStr = formatter.format(dateTime);

Suranchiyev

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;

public class Main {
    public static void main(String[] args) {
        // get current date & time
        LocalDateTime dateTime = LocalDateTime.now();
        System.out.println(dateTime); // 2021-08-17T09:56:26.928961

Suranchiyev

import java.time.LocalDateTime;

public class Main {
    public static void main(String[] args) {
        // get current date & time
        LocalDateTime dateTime = LocalDateTime.now();
        System.out.println(dateTime); // 2021-08-17T09:56:26.928961
    }
}

Suranchiyev

import java.time.LocalTime;
import java.time.format.DateTimeFormatter;

public class Main {
    public static void main(String[] args) {
        LocalTime time = LocalTime.of(9, 00);

        // Formatting time
        DateTimeFormatter f = DateTimeFormatter.ofPattern("hh:mm a");
        // 'a' will add time extension for 12 hours format

Suranchiyev

import java.time.LocalTime;

public class Main {
    public static void main(String[] args) {
        LocalTime time = LocalTime.now();
        System.out.println(time); // 09:26:18.922276

        // build LocalTime object manually
        time = LocalTime.of(9, 26, 18);
        System.out.println(time); // 09:26:18

Suranchiyev

import java.time.LocalTime;

public class Main {
    public static void main(String[] args) {
        LocalTime time = LocalTime.now();
        System.out.println(time); // 09:26:18.922276
    }
}

Suranchiyev

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;

public class Main {
    public static void main(String[] args) {
        String str = "August 26, 2021";

        DateTimeFormatter f = DateTimeFormatter.ofPattern("MMMM dd, uuuu");
        LocalDate date = LocalDate.parse(str, f);