Instant और Duration

import java.time.Instant;

public class Main {
    public static void main(String[] args) {
        Instant fixed = Instant.ofEpochSecond(1000000000);
        System.out.println(fixed);
    }
}

import java.time.Instant;

public class Main {
    public static void main(String[] args) {
        Instant t = Instant.ofEpochSecond(1500000000);
        System.out.println(t.getEpochSecond());
        System.out.println(t.toEpochMilli());
    }
}

import java.time.Duration;

public class Main {
    public static void main(String[] args) {
        Duration d = Duration.ofMinutes(90);
        System.out.println(d);
        System.out.println(d.toHours());
    }
}

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

public class Main {
    public static void main(String[] args) {
        Instant start = Instant.ofEpochSecond(1000);
        Instant end = Instant.ofEpochSecond(1075);
        Duration elapsed = Duration.between(start, end);
        System.out.println(elapsed.getSeconds());
    }
}

import java.time.Duration;

public class Main {
    public static void main(String[] args) {
        Duration d = Duration.ofSeconds(7320);
        System.out.println(d.toMinutes());
        System.out.println(d.toHours());
    }
}

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

public class Main {
    public static void main(String[] args) {
        Instant now = Instant.ofEpochSecond(1000);
        Instant later = now.plus(Duration.ofHours(2));
        System.out.println(later.getEpochSecond());
    }
}

import java.time.Instant;

public class Main {
    public static void main(String[] args) {
        Instant t = Instant.ofEpochSecond(0);
        System.out.println(t.plusSeconds(3600).getEpochSecond());
    }
}

import java.time.Instant;

public class Main {
    public static void main(String[] args) {
        Instant a = Instant.ofEpochSecond(100);
        Instant b = Instant.ofEpochSecond(200);
        System.out.println(a.isBefore(b));
    }
}

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

public class Main {
    public static void main(String[] args) {
        Duration d = Duration.between(Instant.ofEpochSecond(200), Instant.ofEpochSecond(100));
        System.out.println(d.isNegative());
        System.out.println(d.abs().getSeconds());
    }
}