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src/java.base/share/classes/java/time/ZoneId.java

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 237         entry("ECT", "Europe/Paris"),
 238         entry("IET", "America/Indiana/Indianapolis"),
 239         entry("IST", "Asia/Kolkata"),
 240         entry("JST", "Asia/Tokyo"),
 241         entry("MIT", "Pacific/Apia"),
 242         entry("NET", "Asia/Yerevan"),
 243         entry("NST", "Pacific/Auckland"),
 244         entry("PLT", "Asia/Karachi"),
 245         entry("PNT", "America/Phoenix"),
 246         entry("PRT", "America/Puerto_Rico"),
 247         entry("PST", "America/Los_Angeles"),
 248         entry("SST", "Pacific/Guadalcanal"),
 249         entry("VST", "Asia/Ho_Chi_Minh"),
 250         entry("EST", "-05:00"),
 251         entry("MST", "-07:00"),
 252         entry("HST", "-10:00")
 253     );
 254     /**
 255      * Serialization version.
 256      */

 257     private static final long serialVersionUID = 8352817235686L;
 258 
 259     //-----------------------------------------------------------------------
 260     /**
 261      * Gets the system default time-zone.
 262      * <p>
 263      * This queries {@link TimeZone#getDefault()} to find the default time-zone
 264      * and converts it to a {@code ZoneId}. If the system default time-zone is changed,
 265      * then the result of this method will also change.
 266      *
 267      * @return the zone ID, not null
 268      * @throws DateTimeException if the converted zone ID has an invalid format
 269      * @throws ZoneRulesException if the converted zone region ID cannot be found
 270      */
 271     public static ZoneId systemDefault() {
 272         return TimeZone.getDefault().toZoneId();
 273     }
 274 
 275     /**
 276      * Gets the set of available zone IDs.


 607         return false;
 608     }
 609 
 610     /**
 611      * A hash code for this time-zone ID.
 612      *
 613      * @return a suitable hash code
 614      */
 615     @Override
 616     public int hashCode() {
 617         return getId().hashCode();
 618     }
 619 
 620     //-----------------------------------------------------------------------
 621     /**
 622      * Defend against malicious streams.
 623      *
 624      * @param s the stream to read
 625      * @throws InvalidObjectException always
 626      */

 627     private void readObject(ObjectInputStream s) throws InvalidObjectException {
 628         throw new InvalidObjectException("Deserialization via serialization delegate");
 629     }
 630 
 631     /**
 632      * Outputs this zone as a {@code String}, using the ID.
 633      *
 634      * @return a string representation of this time-zone ID, not null
 635      */
 636     @Override
 637     public String toString() {
 638         return getId();
 639     }
 640 
 641     //-----------------------------------------------------------------------
 642     /**
 643      * Writes the object using a
 644      * <a href="{@docRoot}/serialized-form.html#java.time.Ser">dedicated serialized form</a>.
 645      * @serialData
 646      * <pre>
 647      *  out.writeByte(7);  // identifies a ZoneId (not ZoneOffset)
 648      *  out.writeUTF(getId());
 649      * </pre>
 650      * <p>
 651      * When read back in, the {@code ZoneId} will be created as though using
 652      * {@link #of(String)}, but without any exception in the case where the
 653      * ID has a valid format, but is not in the known set of region-based IDs.
 654      *
 655      * @return the instance of {@code Ser}, not null
 656      */
 657     // this is here for serialization Javadoc

 658     private Object writeReplace() {
 659         return new Ser(Ser.ZONE_REGION_TYPE, this);
 660     }
 661 
 662     abstract void write(DataOutput out) throws IOException;
 663 
 664 }


 237         entry("ECT", "Europe/Paris"),
 238         entry("IET", "America/Indiana/Indianapolis"),
 239         entry("IST", "Asia/Kolkata"),
 240         entry("JST", "Asia/Tokyo"),
 241         entry("MIT", "Pacific/Apia"),
 242         entry("NET", "Asia/Yerevan"),
 243         entry("NST", "Pacific/Auckland"),
 244         entry("PLT", "Asia/Karachi"),
 245         entry("PNT", "America/Phoenix"),
 246         entry("PRT", "America/Puerto_Rico"),
 247         entry("PST", "America/Los_Angeles"),
 248         entry("SST", "Pacific/Guadalcanal"),
 249         entry("VST", "Asia/Ho_Chi_Minh"),
 250         entry("EST", "-05:00"),
 251         entry("MST", "-07:00"),
 252         entry("HST", "-10:00")
 253     );
 254     /**
 255      * Serialization version.
 256      */
 257     @java.io.Serial
 258     private static final long serialVersionUID = 8352817235686L;
 259 
 260     //-----------------------------------------------------------------------
 261     /**
 262      * Gets the system default time-zone.
 263      * <p>
 264      * This queries {@link TimeZone#getDefault()} to find the default time-zone
 265      * and converts it to a {@code ZoneId}. If the system default time-zone is changed,
 266      * then the result of this method will also change.
 267      *
 268      * @return the zone ID, not null
 269      * @throws DateTimeException if the converted zone ID has an invalid format
 270      * @throws ZoneRulesException if the converted zone region ID cannot be found
 271      */
 272     public static ZoneId systemDefault() {
 273         return TimeZone.getDefault().toZoneId();
 274     }
 275 
 276     /**
 277      * Gets the set of available zone IDs.


 608         return false;
 609     }
 610 
 611     /**
 612      * A hash code for this time-zone ID.
 613      *
 614      * @return a suitable hash code
 615      */
 616     @Override
 617     public int hashCode() {
 618         return getId().hashCode();
 619     }
 620 
 621     //-----------------------------------------------------------------------
 622     /**
 623      * Defend against malicious streams.
 624      *
 625      * @param s the stream to read
 626      * @throws InvalidObjectException always
 627      */
 628     @java.io.Serial
 629     private void readObject(ObjectInputStream s) throws InvalidObjectException {
 630         throw new InvalidObjectException("Deserialization via serialization delegate");
 631     }
 632 
 633     /**
 634      * Outputs this zone as a {@code String}, using the ID.
 635      *
 636      * @return a string representation of this time-zone ID, not null
 637      */
 638     @Override
 639     public String toString() {
 640         return getId();
 641     }
 642 
 643     //-----------------------------------------------------------------------
 644     /**
 645      * Writes the object using a
 646      * <a href="{@docRoot}/serialized-form.html#java.time.Ser">dedicated serialized form</a>.
 647      * @serialData
 648      * <pre>
 649      *  out.writeByte(7);  // identifies a ZoneId (not ZoneOffset)
 650      *  out.writeUTF(getId());
 651      * </pre>
 652      * <p>
 653      * When read back in, the {@code ZoneId} will be created as though using
 654      * {@link #of(String)}, but without any exception in the case where the
 655      * ID has a valid format, but is not in the known set of region-based IDs.
 656      *
 657      * @return the instance of {@code Ser}, not null
 658      */
 659     // this is here for serialization Javadoc
 660     @java.io.Serial
 661     private Object writeReplace() {
 662         return new Ser(Ser.ZONE_REGION_TYPE, this);
 663     }
 664 
 665     abstract void write(DataOutput out) throws IOException;
 666 
 667 }
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