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TIOBE - Java Coding Standard

Rule:  Optimization12Checked automatically with code checker

Synopsis:Avoid creating Calendar objects
Severity Level:6

A Calendar is a heavyweight object and expensive to create. Use new Date(), java.time.LocalDateTime.now() or ZonedDateTime.now() instead.
import java.time.LocalDateTime;
import java.util.Calendar;
import java.util.Date;

public class DateStuff {
    private Date bad1() {
        return Calendar.getInstance().getTime(); // now
    private Date good1a() {
        return new Date(); // now
    private LocalDateTime good1b() {
        return LocalDateTime.now();
    private long bad2() {
        return Calendar.getInstance().getTimeInMillis();
    private long good2() {
        return System.currentTimeMillis();