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src/java.base/share/classes/java/lang/System.java

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 516      *
 517      * @param      src      the source array.
 518      * @param      srcPos   starting position in the source array.
 519      * @param      dest     the destination array.
 520      * @param      destPos  starting position in the destination data.
 521      * @param      length   the number of array elements to be copied.
 522      * @throws     IndexOutOfBoundsException  if copying would cause
 523      *             access of data outside array bounds.
 524      * @throws     ArrayStoreException  if an element in the {@code src}
 525      *             array could not be stored into the {@code dest} array
 526      *             because of a type mismatch.
 527      * @throws     NullPointerException if either {@code src} or
 528      *             {@code dest} is {@code null}.
 529      */
 530     @HotSpotIntrinsicCandidate
 531     public static native void arraycopy(Object src,  int  srcPos,
 532                                         Object dest, int destPos,
 533                                         int length);
 534 
 535     /**






























 536      * Returns the same hash code for the given object as
 537      * would be returned by the default method hashCode(),
 538      * whether or not the given object's class overrides
 539      * hashCode().
 540      * The hash code for the null reference is zero.
 541      *
 542      * @param x object for which the hashCode is to be calculated
 543      * @return  the hashCode
 544      * @since   1.1
 545      * @see Object#hashCode
 546      * @see java.util.Objects#hashCode(Object)
 547      */
 548     @HotSpotIntrinsicCandidate
 549     public static native int identityHashCode(Object x);
 550 
 551     /**
 552      * System properties. The following properties are guaranteed to be defined:
 553      * <dl>
 554      * <dt>java.version         <dd>Java version number
 555      * <dt>java.version.date    <dd>Java version date




 516      *
 517      * @param      src      the source array.
 518      * @param      srcPos   starting position in the source array.
 519      * @param      dest     the destination array.
 520      * @param      destPos  starting position in the destination data.
 521      * @param      length   the number of array elements to be copied.
 522      * @throws     IndexOutOfBoundsException  if copying would cause
 523      *             access of data outside array bounds.
 524      * @throws     ArrayStoreException  if an element in the {@code src}
 525      *             array could not be stored into the {@code dest} array
 526      *             because of a type mismatch.
 527      * @throws     NullPointerException if either {@code src} or
 528      *             {@code dest} is {@code null}.
 529      */
 530     @HotSpotIntrinsicCandidate
 531     public static native void arraycopy(Object src,  int  srcPos,
 532                                         Object dest, int destPos,
 533                                         int length);
 534 
 535     /**
 536      * Set bit atomically
 537      * @param bits   bits
 538      * @param index  index
 539      */
 540     @HotSpotIntrinsicCandidate
 541     public static void setBit(byte[] bits, int index) {
 542         throw new UnsupportedOperationException();
 543     }
 544 
 545     /**
 546      * Clear bit atomically
 547      * @param bits   bits
 548      * @param index  index
 549      */
 550     @HotSpotIntrinsicCandidate
 551     public static void clrBit(byte[] bits, int index) {
 552         throw new UnsupportedOperationException();
 553     }
 554 
 555     /**
 556      * Get bit
 557      * @param bits   bits
 558      * @param index  index
 559      * @return       value
 560      */
 561     public static boolean isBit(byte[] bits, int index) {
 562         return ((bits[index>>3] >> (index & 7)) & 1) == 1;
 563     }
 564 
 565     /**
 566      * Returns the same hash code for the given object as
 567      * would be returned by the default method hashCode(),
 568      * whether or not the given object's class overrides
 569      * hashCode().
 570      * The hash code for the null reference is zero.
 571      *
 572      * @param x object for which the hashCode is to be calculated
 573      * @return  the hashCode
 574      * @since   1.1
 575      * @see Object#hashCode
 576      * @see java.util.Objects#hashCode(Object)
 577      */
 578     @HotSpotIntrinsicCandidate
 579     public static native int identityHashCode(Object x);
 580 
 581     /**
 582      * System properties. The following properties are guaranteed to be defined:
 583      * <dl>
 584      * <dt>java.version         <dd>Java version number
 585      * <dt>java.version.date    <dd>Java version date


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