Convert EPOCH to Desired time format

import lombok.NonNull;

import java.time.Instant;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;

/**
 * @author: Bhupendra Singh@
 * @date 7/6/21 6:59 PM
 */
public class EPOCHToLocalDateTime {
    /**
     * This methods converts the date from epoch to "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'" UTC format.
     * @param dateTime
     * @return
     */
    public String convertEPOCHToLocalDateTimeFormat(@NonNull final String dateTime) {
        // ZoneOffset.UTC can be replaced with desired zone.
        final ZonedDateTime zonedDateTime = 
                   Instant.ofEpochMilli(Long.parseLong(dateTime)).atZone(ZoneOffset.UTC);
        // "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'" can be replaced with desired pattern.
        final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
        return zonedDateTime.format(formatter);
    }
}