src/share/classes/java/time/temporal/ChronoUnit.java

*** 55,64 ****
--- 55,67 ----
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  package java.time.temporal;
  
  import java.time.Duration;
+ import java.time.chrono.ChronoLocalDate;
+ import java.time.chrono.ChronoLocalDateTime;
+ import java.time.chrono.ChronoZonedDateTime;
  
  /**
   * A standard set of date periods units.
   * <p>
   * This set of units provide unit-based access to manipulate a date, time or date-time.
*** 252,284 ****
          return this.compareTo(DAYS) < 0;
      }
  
      //-----------------------------------------------------------------------
      @Override
!     public boolean isSupported(Temporal temporal) {
          if (this == FOREVER) {
              return false;
          }
          if (temporal instanceof ChronoLocalDate) {
              return isDateUnit();
          }
          if (temporal instanceof ChronoLocalDateTime || temporal instanceof ChronoZonedDateTime) {
              return true;
          }
!         return TemporalUnit.super.isSupported(temporal);
      }
  
      @SuppressWarnings("unchecked")
      @Override
!     public <R extends Temporal> R doPlus(R dateTime, long periodToAdd) {
!         return (R) dateTime.plus(periodToAdd, this);
      }
  
      //-----------------------------------------------------------------------
      @Override
!     public <R extends Temporal> SimplePeriod between(R dateTime1, R dateTime2) {
!         return new SimplePeriod(dateTime1.periodUntil(dateTime2, this), this);
      }
  
      //-----------------------------------------------------------------------
      @Override
      public String toString() {
--- 255,287 ----
          return this.compareTo(DAYS) < 0;
      }
  
      //-----------------------------------------------------------------------
      @Override
!     public boolean isSupportedBy(Temporal temporal) {
          if (this == FOREVER) {
              return false;
          }
          if (temporal instanceof ChronoLocalDate) {
              return isDateUnit();
          }
          if (temporal instanceof ChronoLocalDateTime || temporal instanceof ChronoZonedDateTime) {
              return true;
          }
!         return TemporalUnit.super.isSupportedBy(temporal);
      }
  
      @SuppressWarnings("unchecked")
      @Override
!     public <R extends Temporal> R addTo(R temporal, long amount) {
!         return (R) temporal.plus(amount, this);
      }
  
      //-----------------------------------------------------------------------
      @Override
!     public long between(Temporal temporal1, Temporal temporal2) {
!         return temporal1.periodUntil(temporal2, this);
      }
  
      //-----------------------------------------------------------------------
      @Override
      public String toString() {