https://openjdk.java.net/ 
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.  Oracle designates this
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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package java.sql;

import java.time.Instant;
import java.time.LocalDate;


A thin wrapper around a millisecond value that allows
JDBC to identify this as an SQL DATE value.  A
milliseconds value represents the number of milliseconds that
have passed since January 1, 1970 00:00:00.000 GMT.


To conform with the definition of SQL DATE, the
millisecond values wrapped by a java.sql.Date instance
must be 'normalized' by setting the
hours, minutes, seconds, and milliseconds to zero in the particular
time zone with which the instance is associated.

/**
 * <P>A thin wrapper around a millisecond value that allows
 * JDBC to identify this as an SQL <code>DATE</code> value.  A
 * milliseconds value represents the number of milliseconds that
 * have passed since January 1, 1970 00:00:00.000 GMT.
 * <p>
 * To conform with the definition of SQL <code>DATE</code>, the
 * millisecond values wrapped by a <code>java.sql.Date</code> instance
 * must be 'normalized' by setting the
 * hours, minutes, seconds, and milliseconds to zero in the particular
 * time zone with which the instance is associated.
 */
public class Date extends java.util.Date {

    
Constructs a Date object initialized with the given
year, month, and day.


The result is undefined if a given argument is out of bounds.

Params:
  • year – the year minus 1900; must be 0 to 8099. (Note that
       8099 is 9999 minus 1900.)
  • month – 0 to 11
  • day – 1 to 31
Deprecated:instead use the constructor Date(long date)
/**
     * Constructs a <code>Date</code> object initialized with the given
     * year, month, and day.
     * <P>
     * The result is undefined if a given argument is out of bounds.
     *
     * @param year the year minus 1900; must be 0 to 8099. (Note that
     *        8099 is 9999 minus 1900.)
     * @param month 0 to 11
     * @param day 1 to 31
     * @deprecated instead use the constructor <code>Date(long date)</code>
     */
    @Deprecated
    public Date(int year, int month, int day) {
        super(year, month, day);
    }

    
Constructs a Date object using the given milliseconds
time value.  If the given milliseconds value contains time
information, the driver will set the time components to the
time in the default time zone (the time zone of the Java virtual
machine running the application) that corresponds to zero GMT.

Params:
  • date – milliseconds since January 1, 1970, 00:00:00 GMT not
       to exceed the milliseconds representation for the year 8099.
       A negative number indicates the number of milliseconds
       before January 1, 1970, 00:00:00 GMT.
/**
     * Constructs a <code>Date</code> object using the given milliseconds
     * time value.  If the given milliseconds value contains time
     * information, the driver will set the time components to the
     * time in the default time zone (the time zone of the Java virtual
     * machine running the application) that corresponds to zero GMT.
     *
     * @param date milliseconds since January 1, 1970, 00:00:00 GMT not
     *        to exceed the milliseconds representation for the year 8099.
     *        A negative number indicates the number of milliseconds
     *        before January 1, 1970, 00:00:00 GMT.
     */
    public Date(long date) {
        // If the millisecond date value contains time info, mask it out.
        super(date);

    }

    
Sets an existing Date object
using the given milliseconds time value.
If the given milliseconds value contains time information,
the driver will set the time components to the
time in the default time zone (the time zone of the Java virtual
machine running the application) that corresponds to zero GMT.

Params:
  • date – milliseconds since January 1, 1970, 00:00:00 GMT not
       to exceed the milliseconds representation for the year 8099.
       A negative number indicates the number of milliseconds
       before January 1, 1970, 00:00:00 GMT.
/**
     * Sets an existing <code>Date</code> object
     * using the given milliseconds time value.
     * If the given milliseconds value contains time information,
     * the driver will set the time components to the
     * time in the default time zone (the time zone of the Java virtual
     * machine running the application) that corresponds to zero GMT.
     *
     * @param date milliseconds since January 1, 1970, 00:00:00 GMT not
     *        to exceed the milliseconds representation for the year 8099.
     *        A negative number indicates the number of milliseconds
     *        before January 1, 1970, 00:00:00 GMT.
     */
    public void setTime(long date) {
        // If the millisecond date value contains time info, mask it out.
        super.setTime(date);
    }

    
Converts a string in JDBC date escape format to
a Date value.

Params:
  • s – a String object representing a date in
       in the format "yyyy-[m]m-[d]d". The leading zero for mm
and dd may also be omitted.
Throws:
Returns:a java.sql.Date object representing the
        given date
/**
     * Converts a string in JDBC date escape format to
     * a <code>Date</code> value.
     *
     * @param s a <code>String</code> object representing a date in
     *        in the format "yyyy-[m]m-[d]d". The leading zero for <code>mm</code>
     * and <code>dd</code> may also be omitted.
     * @return a <code>java.sql.Date</code> object representing the
     *         given date
     * @throws IllegalArgumentException if the date given is not in the
     *         JDBC date escape format (yyyy-[m]m-[d]d)
     */
    public static Date valueOf(String s) {
        final int YEAR_LENGTH = 4;
        final int MONTH_LENGTH = 2;
        final int DAY_LENGTH = 2;
        final int MAX_MONTH = 12;
        final int MAX_DAY = 31;
        int firstDash;
        int secondDash;
        Date d = null;
        if (s == null) {
            throw new java.lang.IllegalArgumentException();
        }

        firstDash = s.indexOf('-');
        secondDash = s.indexOf('-', firstDash + 1);

        if ((firstDash > 0) && (secondDash > 0) && (secondDash < s.length() - 1)) {
            String yyyy = s.substring(0, firstDash);
            String mm = s.substring(firstDash + 1, secondDash);
            String dd = s.substring(secondDash + 1);
            if (yyyy.length() == YEAR_LENGTH &&
                    (mm.length() >= 1 && mm.length() <= MONTH_LENGTH) &&
                    (dd.length() >= 1 && dd.length() <= DAY_LENGTH)) {
                int year = Integer.parseInt(yyyy);
                int month = Integer.parseInt(mm);
                int day = Integer.parseInt(dd);

                if ((month >= 1 && month <= MAX_MONTH) && (day >= 1 && day <= MAX_DAY)) {
                    d = new Date(year - 1900, month - 1, day);
                }
            }
        }
        if (d == null) {
            throw new java.lang.IllegalArgumentException();
        }

        return d;

    }


    
Formats a date in the date escape format yyyy-mm-dd.



Returns:a String in yyyy-mm-dd format
/**
     * Formats a date in the date escape format yyyy-mm-dd.
     * <P>
     * @return a String in yyyy-mm-dd format
     */
    @SuppressWarnings("deprecation")
    public String toString () {
        int year = super.getYear() + 1900;
        int month = super.getMonth() + 1;
        int day = super.getDate();

        char buf[] = "2000-00-00".toCharArray();
        buf[0] = Character.forDigit(year/1000,10);
        buf[1] = Character.forDigit((year/100)%10,10);
        buf[2] = Character.forDigit((year/10)%10,10);
        buf[3] = Character.forDigit(year%10,10);
        buf[5] = Character.forDigit(month/10,10);
        buf[6] = Character.forDigit(month%10,10);
        buf[8] = Character.forDigit(day/10,10);
        buf[9] = Character.forDigit(day%10,10);

        return new String(buf);
    }

    // Override all the time operations inherited from java.util.Date;

   
This method is deprecated and should not be used because SQL Date
values do not have a time component.

Throws:
See Also:
Deprecated:
/**
    * This method is deprecated and should not be used because SQL Date
    * values do not have a time component.
    *
    * @deprecated
    * @exception java.lang.IllegalArgumentException if this method is invoked
    * @see #setHours
    */
    @Deprecated
    public int getHours() {
        throw new java.lang.IllegalArgumentException();
    }

   
This method is deprecated and should not be used because SQL Date
values do not have a time component.

Throws:
See Also:
Deprecated:
/**
    * This method is deprecated and should not be used because SQL Date
    * values do not have a time component.
    *
    * @deprecated
    * @exception java.lang.IllegalArgumentException if this method is invoked
    * @see #setMinutes
    */
    @Deprecated
    public int getMinutes() {
        throw new java.lang.IllegalArgumentException();
    }

   
This method is deprecated and should not be used because SQL Date
values do not have a time component.

Throws:
See Also:
Deprecated:
/**
    * This method is deprecated and should not be used because SQL Date
    * values do not have a time component.
    *
    * @deprecated
    * @exception java.lang.IllegalArgumentException if this method is invoked
    * @see #setSeconds
    */
    @Deprecated
    public int getSeconds() {
        throw new java.lang.IllegalArgumentException();
    }

   
This method is deprecated and should not be used because SQL Date
values do not have a time component.

Throws:
See Also:
Deprecated:
/**
    * This method is deprecated and should not be used because SQL Date
    * values do not have a time component.
    *
    * @deprecated
    * @exception java.lang.IllegalArgumentException if this method is invoked
    * @see #getHours
    */
    @Deprecated
    public void setHours(int i) {
        throw new java.lang.IllegalArgumentException();
    }

   
This method is deprecated and should not be used because SQL Date
values do not have a time component.

Throws:
See Also:
Deprecated:
/**
    * This method is deprecated and should not be used because SQL Date
    * values do not have a time component.
    *
    * @deprecated
    * @exception java.lang.IllegalArgumentException if this method is invoked
    * @see #getMinutes
    */
    @Deprecated
    public void setMinutes(int i) {
        throw new java.lang.IllegalArgumentException();
    }

   
This method is deprecated and should not be used because SQL Date
values do not have a time component.

Throws:
See Also:
Deprecated:
/**
    * This method is deprecated and should not be used because SQL Date
    * values do not have a time component.
    *
    * @deprecated
    * @exception java.lang.IllegalArgumentException if this method is invoked
    * @see #getSeconds
    */
    @Deprecated
    public void setSeconds(int i) {
        throw new java.lang.IllegalArgumentException();
    }

   
Private serial version unique ID to ensure serialization
compatibility.

/**
    * Private serial version unique ID to ensure serialization
    * compatibility.
    */
    static final long serialVersionUID = 1511598038487230103L;

    
Obtains an instance of Date from a LocalDate object with the same year, month and day of month value as the given LocalDate. 
 The provided LocalDate is interpreted as the local date in the local time zone. 
Params:
  • date – a LocalDate to convert
Throws:
Returns:a Date object
Since:1.8
/**
     * Obtains an instance of {@code Date} from a {@link LocalDate} object
     * with the same year, month and day of month value as the given
     * {@code LocalDate}.
     * <p>
     * The provided {@code LocalDate} is interpreted as the local date
     * in the local time zone.
     *
     * @param date a {@code LocalDate} to convert
     * @return a {@code Date} object
     * @exception NullPointerException if {@code date} is null
     * @since 1.8
     */
    @SuppressWarnings("deprecation")
    public static Date valueOf(LocalDate date) {
        return new Date(date.getYear() - 1900, date.getMonthValue() -1,
                        date.getDayOfMonth());
    }

    
Converts this Date object to a LocalDate 
 The conversion creates a LocalDate that represents the same date value as this Date in local time zone 
Returns:a LocalDate object representing the same date value
Since:1.8
/**
     * Converts this {@code Date} object to a {@code LocalDate}
     * <p>
     * The conversion creates a {@code LocalDate} that represents the same
     * date value as this {@code Date} in local time zone
     *
     * @return a {@code LocalDate} object representing the same date value
     *
     * @since 1.8
     */
    @SuppressWarnings("deprecation")
    public LocalDate toLocalDate() {
        return LocalDate.of(getYear() + 1900, getMonth() + 1, getDate());
    }

   
This method always throws an UnsupportedOperationException and should not be used because SQL Date values do not have a time component. 
Throws:
/**
    * This method always throws an UnsupportedOperationException and should
    * not be used because SQL {@code Date} values do not have a time
    * component.
    *
    * @exception java.lang.UnsupportedOperationException if this method is invoked
    */
    @Override
    public Instant toInstant() {
        throw new java.lang.UnsupportedOperationException();
    }
}