83 * Unless otherwise noted, passing a {@code null} argument to a constructor
84 * or method in this class will cause a {@link NullPointerException} to be
85 * thrown.
86 * <p>
87 * As of release JDK 5, this class has been supplemented with an equivalent
88 * class designed for use by a single thread, {@link StringBuilder}. The
89 * {@code StringBuilder} class should generally be used in preference to
90 * this one, as it supports all of the same operations but it is faster, as
91 * it performs no synchronization.
92 *
93 * @author Arthur van Hoff
94 * @see java.lang.StringBuilder
95 * @see java.lang.String
96 * @since 1.0
97 */
98 public final class StringBuffer
99 extends AbstractStringBuilder
100 implements java.io.Serializable, CharSequence
101 {
102
103 /**
104 * A cache of the last value returned by toString. Cleared
105 * whenever the StringBuffer is modified.
106 */
107 private transient String toStringCache;
108
109 /** use serialVersionUID from JDK 1.0.2 for interoperability */
110 static final long serialVersionUID = 3388685877147921107L;
111
112 /**
113 * Constructs a string buffer with no characters in it and an
114 * initial capacity of 16 characters.
115 */
116 @HotSpotIntrinsicCandidate
117 public StringBuffer() {
118 super(16);
119 }
120
121 /**
122 * Constructs a string buffer with no characters in it and
123 * the specified initial capacity.
124 *
125 * @param capacity the initial capacity.
126 * @exception NegativeArraySizeException if the {@code capacity}
127 * argument is less than {@code 0}.
128 */
175
176 @Override
177 public synchronized void ensureCapacity(int minimumCapacity) {
178 super.ensureCapacity(minimumCapacity);
179 }
180
181 /**
182 * @since 1.5
183 */
184 @Override
185 public synchronized void trimToSize() {
186 super.trimToSize();
187 }
188
189 /**
190 * @throws IndexOutOfBoundsException {@inheritDoc}
191 * @see #length()
192 */
193 @Override
194 public synchronized void setLength(int newLength) {
195 toStringCache = null;
196 super.setLength(newLength);
197 }
198
199 /**
200 * @throws IndexOutOfBoundsException {@inheritDoc}
201 * @see #length()
202 */
203 @Override
204 public synchronized char charAt(int index) {
205 return super.charAt(index);
206 }
207
208 /**
209 * @throws IndexOutOfBoundsException {@inheritDoc}
210 * @since 1.5
211 */
212 @Override
213 public synchronized int codePointAt(int index) {
214 return super.codePointAt(index);
215 }
240 public synchronized int offsetByCodePoints(int index, int codePointOffset) {
241 return super.offsetByCodePoints(index, codePointOffset);
242 }
243
244 /**
245 * @throws IndexOutOfBoundsException {@inheritDoc}
246 */
247 @Override
248 public synchronized void getChars(int srcBegin, int srcEnd, char[] dst,
249 int dstBegin)
250 {
251 super.getChars(srcBegin, srcEnd, dst, dstBegin);
252 }
253
254 /**
255 * @throws IndexOutOfBoundsException {@inheritDoc}
256 * @see #length()
257 */
258 @Override
259 public synchronized void setCharAt(int index, char ch) {
260 toStringCache = null;
261 super.setCharAt(index, ch);
262 }
263
264 @Override
265 public synchronized StringBuffer append(Object obj) {
266 toStringCache = null;
267 super.append(String.valueOf(obj));
268 return this;
269 }
270
271 @Override
272 @HotSpotIntrinsicCandidate
273 public synchronized StringBuffer append(String str) {
274 toStringCache = null;
275 super.append(str);
276 return this;
277 }
278
279 /**
280 * Appends the specified {@code StringBuffer} to this sequence.
281 * <p>
282 * The characters of the {@code StringBuffer} argument are appended,
283 * in order, to the contents of this {@code StringBuffer}, increasing the
284 * length of this {@code StringBuffer} by the length of the argument.
285 * If {@code sb} is {@code null}, then the four characters
286 * {@code "null"} are appended to this {@code StringBuffer}.
287 * <p>
288 * Let <i>n</i> be the length of the old character sequence, the one
289 * contained in the {@code StringBuffer} just prior to execution of the
290 * {@code append} method. Then the character at index <i>k</i> in
291 * the new character sequence is equal to the character at index <i>k</i>
292 * in the old character sequence, if <i>k</i> is less than <i>n</i>;
293 * otherwise, it is equal to the character at index <i>k-n</i> in the
294 * argument {@code sb}.
295 * <p>
296 * This method synchronizes on {@code this}, the destination
297 * object, but does not synchronize on the source ({@code sb}).
298 *
299 * @param sb the {@code StringBuffer} to append.
300 * @return a reference to this object.
301 * @since 1.4
302 */
303 public synchronized StringBuffer append(StringBuffer sb) {
304 toStringCache = null;
305 super.append(sb);
306 return this;
307 }
308
309 /**
310 * @since 1.8
311 */
312 @Override
313 synchronized StringBuffer append(AbstractStringBuilder asb) {
314 toStringCache = null;
315 super.append(asb);
316 return this;
317 }
318
319 /**
320 * Appends the specified {@code CharSequence} to this
321 * sequence.
322 * <p>
323 * The characters of the {@code CharSequence} argument are appended,
324 * in order, increasing the length of this sequence by the length of the
325 * argument.
326 *
327 * <p>The result of this method is exactly the same as if it were an
328 * invocation of this.append(s, 0, s.length());
329 *
330 * <p>This method synchronizes on {@code this}, the destination
331 * object, but does not synchronize on the source ({@code s}).
332 *
333 * <p>If {@code s} is {@code null}, then the four characters
334 * {@code "null"} are appended.
335 *
336 * @param s the {@code CharSequence} to append.
337 * @return a reference to this object.
338 * @since 1.5
339 */
340 @Override
341 public synchronized StringBuffer append(CharSequence s) {
342 toStringCache = null;
343 super.append(s);
344 return this;
345 }
346
347 /**
348 * @throws IndexOutOfBoundsException {@inheritDoc}
349 * @since 1.5
350 */
351 @Override
352 public synchronized StringBuffer append(CharSequence s, int start, int end)
353 {
354 toStringCache = null;
355 super.append(s, start, end);
356 return this;
357 }
358
359 @Override
360 public synchronized StringBuffer append(char[] str) {
361 toStringCache = null;
362 super.append(str);
363 return this;
364 }
365
366 /**
367 * @throws IndexOutOfBoundsException {@inheritDoc}
368 */
369 @Override
370 public synchronized StringBuffer append(char[] str, int offset, int len) {
371 toStringCache = null;
372 super.append(str, offset, len);
373 return this;
374 }
375
376 @Override
377 public synchronized StringBuffer append(boolean b) {
378 toStringCache = null;
379 super.append(b);
380 return this;
381 }
382
383 @Override
384 @HotSpotIntrinsicCandidate
385 public synchronized StringBuffer append(char c) {
386 toStringCache = null;
387 super.append(c);
388 return this;
389 }
390
391 @Override
392 @HotSpotIntrinsicCandidate
393 public synchronized StringBuffer append(int i) {
394 toStringCache = null;
395 super.append(i);
396 return this;
397 }
398
399 /**
400 * @since 1.5
401 */
402 @Override
403 public synchronized StringBuffer appendCodePoint(int codePoint) {
404 toStringCache = null;
405 super.appendCodePoint(codePoint);
406 return this;
407 }
408
409 @Override
410 public synchronized StringBuffer append(long lng) {
411 toStringCache = null;
412 super.append(lng);
413 return this;
414 }
415
416 @Override
417 public synchronized StringBuffer append(float f) {
418 toStringCache = null;
419 super.append(f);
420 return this;
421 }
422
423 @Override
424 public synchronized StringBuffer append(double d) {
425 toStringCache = null;
426 super.append(d);
427 return this;
428 }
429
430 /**
431 * @throws StringIndexOutOfBoundsException {@inheritDoc}
432 * @since 1.2
433 */
434 @Override
435 public synchronized StringBuffer delete(int start, int end) {
436 toStringCache = null;
437 super.delete(start, end);
438 return this;
439 }
440
441 /**
442 * @throws StringIndexOutOfBoundsException {@inheritDoc}
443 * @since 1.2
444 */
445 @Override
446 public synchronized StringBuffer deleteCharAt(int index) {
447 toStringCache = null;
448 super.deleteCharAt(index);
449 return this;
450 }
451
452 /**
453 * @throws StringIndexOutOfBoundsException {@inheritDoc}
454 * @since 1.2
455 */
456 @Override
457 public synchronized StringBuffer replace(int start, int end, String str) {
458 toStringCache = null;
459 super.replace(start, end, str);
460 return this;
461 }
462
463 /**
464 * @throws StringIndexOutOfBoundsException {@inheritDoc}
465 * @since 1.2
466 */
467 @Override
468 public synchronized String substring(int start) {
469 return substring(start, count);
470 }
471
472 /**
473 * @throws IndexOutOfBoundsException {@inheritDoc}
474 * @since 1.4
475 */
476 @Override
477 public synchronized CharSequence subSequence(int start, int end) {
478 return super.substring(start, end);
479 }
480
481 /**
482 * @throws StringIndexOutOfBoundsException {@inheritDoc}
483 * @since 1.2
484 */
485 @Override
486 public synchronized String substring(int start, int end) {
487 return super.substring(start, end);
488 }
489
490 /**
491 * @throws StringIndexOutOfBoundsException {@inheritDoc}
492 * @since 1.2
493 */
494 @Override
495 public synchronized StringBuffer insert(int index, char[] str, int offset,
496 int len)
497 {
498 toStringCache = null;
499 super.insert(index, str, offset, len);
500 return this;
501 }
502
503 /**
504 * @throws StringIndexOutOfBoundsException {@inheritDoc}
505 */
506 @Override
507 public synchronized StringBuffer insert(int offset, Object obj) {
508 toStringCache = null;
509 super.insert(offset, String.valueOf(obj));
510 return this;
511 }
512
513 /**
514 * @throws StringIndexOutOfBoundsException {@inheritDoc}
515 */
516 @Override
517 public synchronized StringBuffer insert(int offset, String str) {
518 toStringCache = null;
519 super.insert(offset, str);
520 return this;
521 }
522
523 /**
524 * @throws StringIndexOutOfBoundsException {@inheritDoc}
525 */
526 @Override
527 public synchronized StringBuffer insert(int offset, char[] str) {
528 toStringCache = null;
529 super.insert(offset, str);
530 return this;
531 }
532
533 /**
534 * @throws IndexOutOfBoundsException {@inheritDoc}
535 * @since 1.5
536 */
537 @Override
538 public StringBuffer insert(int dstOffset, CharSequence s) {
539 // Note, synchronization achieved via invocations of other StringBuffer methods
540 // after narrowing of s to specific type
541 // Ditto for toStringCache clearing
542 super.insert(dstOffset, s);
543 return this;
544 }
545
546 /**
547 * @throws IndexOutOfBoundsException {@inheritDoc}
548 * @since 1.5
549 */
550 @Override
551 public synchronized StringBuffer insert(int dstOffset, CharSequence s,
552 int start, int end)
553 {
554 toStringCache = null;
555 super.insert(dstOffset, s, start, end);
556 return this;
557 }
558
559 /**
560 * @throws StringIndexOutOfBoundsException {@inheritDoc}
561 */
562 @Override
563 public StringBuffer insert(int offset, boolean b) {
564 // Note, synchronization achieved via invocation of StringBuffer insert(int, String)
565 // after conversion of b to String by super class method
566 // Ditto for toStringCache clearing
567 super.insert(offset, b);
568 return this;
569 }
570
571 /**
572 * @throws IndexOutOfBoundsException {@inheritDoc}
573 */
574 @Override
575 public synchronized StringBuffer insert(int offset, char c) {
576 toStringCache = null;
577 super.insert(offset, c);
578 return this;
579 }
580
581 /**
582 * @throws StringIndexOutOfBoundsException {@inheritDoc}
583 */
584 @Override
585 public StringBuffer insert(int offset, int i) {
586 // Note, synchronization achieved via invocation of StringBuffer insert(int, String)
587 // after conversion of i to String by super class method
588 // Ditto for toStringCache clearing
589 super.insert(offset, i);
590 return this;
591 }
592
593 /**
594 * @throws StringIndexOutOfBoundsException {@inheritDoc}
595 */
596 @Override
597 public StringBuffer insert(int offset, long l) {
598 // Note, synchronization achieved via invocation of StringBuffer insert(int, String)
599 // after conversion of l to String by super class method
600 // Ditto for toStringCache clearing
601 super.insert(offset, l);
602 return this;
603 }
604
605 /**
606 * @throws StringIndexOutOfBoundsException {@inheritDoc}
607 */
608 @Override
609 public StringBuffer insert(int offset, float f) {
610 // Note, synchronization achieved via invocation of StringBuffer insert(int, String)
611 // after conversion of f to String by super class method
612 // Ditto for toStringCache clearing
613 super.insert(offset, f);
614 return this;
615 }
616
617 /**
618 * @throws StringIndexOutOfBoundsException {@inheritDoc}
619 */
620 @Override
621 public StringBuffer insert(int offset, double d) {
622 // Note, synchronization achieved via invocation of StringBuffer insert(int, String)
623 // after conversion of d to String by super class method
624 // Ditto for toStringCache clearing
625 super.insert(offset, d);
626 return this;
627 }
628
629 /**
630 * @since 1.4
631 */
632 @Override
633 public int indexOf(String str) {
634 // Note, synchronization achieved via invocations of other StringBuffer methods
635 return super.indexOf(str);
636 }
637
638 /**
639 * @since 1.4
640 */
641 @Override
642 public synchronized int indexOf(String str, int fromIndex) {
643 return super.indexOf(str, fromIndex);
644 }
648 */
649 @Override
650 public int lastIndexOf(String str) {
651 // Note, synchronization achieved via invocations of other StringBuffer methods
652 return lastIndexOf(str, count);
653 }
654
655 /**
656 * @since 1.4
657 */
658 @Override
659 public synchronized int lastIndexOf(String str, int fromIndex) {
660 return super.lastIndexOf(str, fromIndex);
661 }
662
663 /**
664 * @since 1.0.2
665 */
666 @Override
667 public synchronized StringBuffer reverse() {
668 toStringCache = null;
669 super.reverse();
670 return this;
671 }
672
673 @Override
674 @HotSpotIntrinsicCandidate
675 public synchronized String toString() {
676 if (toStringCache == null) {
677 return toStringCache =
678 isLatin1() ? StringLatin1.newString(value, 0, count)
679 : StringUTF16.newString(value, 0, count);
680 }
681 return new String(toStringCache);
682 }
683
684 /**
685 * Serializable fields for StringBuffer.
686 *
687 * @serialField value char[]
688 * The backing character array of this StringBuffer.
689 * @serialField count int
690 * The number of characters in this StringBuffer.
691 * @serialField shared boolean
692 * A flag indicating whether the backing array is shared.
693 * The value is ignored upon deserialization.
694 */
695 private static final java.io.ObjectStreamField[] serialPersistentFields =
696 {
697 new java.io.ObjectStreamField("value", char[].class),
698 new java.io.ObjectStreamField("count", Integer.TYPE),
699 new java.io.ObjectStreamField("shared", Boolean.TYPE),
700 };
701
711 StringLatin1.getChars(value, 0, count, val, 0);
712 } else {
713 StringUTF16.getChars(value, 0, count, val, 0);
714 }
715 fields.put("value", val);
716 fields.put("count", count);
717 fields.put("shared", false);
718 s.writeFields();
719 }
720
721 /**
722 * readObject is called to restore the state of the StringBuffer from
723 * a stream.
724 */
725 private void readObject(java.io.ObjectInputStream s)
726 throws java.io.IOException, ClassNotFoundException {
727 java.io.ObjectInputStream.GetField fields = s.readFields();
728 char[] val = (char[])fields.get("value", null);
729 initBytes(val, 0, val.length);
730 count = fields.get("count", 0);
731 }
732
733 synchronized void getBytes(byte dst[], int dstBegin, byte coder) {
734 super.getBytes(dst, dstBegin, coder);
735 }
736 }
|
83 * Unless otherwise noted, passing a {@code null} argument to a constructor
84 * or method in this class will cause a {@link NullPointerException} to be
85 * thrown.
86 * <p>
87 * As of release JDK 5, this class has been supplemented with an equivalent
88 * class designed for use by a single thread, {@link StringBuilder}. The
89 * {@code StringBuilder} class should generally be used in preference to
90 * this one, as it supports all of the same operations but it is faster, as
91 * it performs no synchronization.
92 *
93 * @author Arthur van Hoff
94 * @see java.lang.StringBuilder
95 * @see java.lang.String
96 * @since 1.0
97 */
98 public final class StringBuffer
99 extends AbstractStringBuilder
100 implements java.io.Serializable, CharSequence
101 {
102
103 /** use serialVersionUID from JDK 1.0.2 for interoperability */
104 static final long serialVersionUID = 3388685877147921107L;
105
106 /**
107 * Constructs a string buffer with no characters in it and an
108 * initial capacity of 16 characters.
109 */
110 @HotSpotIntrinsicCandidate
111 public StringBuffer() {
112 super(16);
113 }
114
115 /**
116 * Constructs a string buffer with no characters in it and
117 * the specified initial capacity.
118 *
119 * @param capacity the initial capacity.
120 * @exception NegativeArraySizeException if the {@code capacity}
121 * argument is less than {@code 0}.
122 */
169
170 @Override
171 public synchronized void ensureCapacity(int minimumCapacity) {
172 super.ensureCapacity(minimumCapacity);
173 }
174
175 /**
176 * @since 1.5
177 */
178 @Override
179 public synchronized void trimToSize() {
180 super.trimToSize();
181 }
182
183 /**
184 * @throws IndexOutOfBoundsException {@inheritDoc}
185 * @see #length()
186 */
187 @Override
188 public synchronized void setLength(int newLength) {
189 super.setLength(newLength);
190 }
191
192 /**
193 * @throws IndexOutOfBoundsException {@inheritDoc}
194 * @see #length()
195 */
196 @Override
197 public synchronized char charAt(int index) {
198 return super.charAt(index);
199 }
200
201 /**
202 * @throws IndexOutOfBoundsException {@inheritDoc}
203 * @since 1.5
204 */
205 @Override
206 public synchronized int codePointAt(int index) {
207 return super.codePointAt(index);
208 }
233 public synchronized int offsetByCodePoints(int index, int codePointOffset) {
234 return super.offsetByCodePoints(index, codePointOffset);
235 }
236
237 /**
238 * @throws IndexOutOfBoundsException {@inheritDoc}
239 */
240 @Override
241 public synchronized void getChars(int srcBegin, int srcEnd, char[] dst,
242 int dstBegin)
243 {
244 super.getChars(srcBegin, srcEnd, dst, dstBegin);
245 }
246
247 /**
248 * @throws IndexOutOfBoundsException {@inheritDoc}
249 * @see #length()
250 */
251 @Override
252 public synchronized void setCharAt(int index, char ch) {
253 super.setCharAt(index, ch);
254 }
255
256 @Override
257 public synchronized StringBuffer append(Object obj) {
258 super.append(String.valueOf(obj));
259 return this;
260 }
261
262 @Override
263 @HotSpotIntrinsicCandidate
264 public synchronized StringBuffer append(String str) {
265 super.append(str);
266 return this;
267 }
268
269 /**
270 * Appends the specified {@code StringBuffer} to this sequence.
271 * <p>
272 * The characters of the {@code StringBuffer} argument are appended,
273 * in order, to the contents of this {@code StringBuffer}, increasing the
274 * length of this {@code StringBuffer} by the length of the argument.
275 * If {@code sb} is {@code null}, then the four characters
276 * {@code "null"} are appended to this {@code StringBuffer}.
277 * <p>
278 * Let <i>n</i> be the length of the old character sequence, the one
279 * contained in the {@code StringBuffer} just prior to execution of the
280 * {@code append} method. Then the character at index <i>k</i> in
281 * the new character sequence is equal to the character at index <i>k</i>
282 * in the old character sequence, if <i>k</i> is less than <i>n</i>;
283 * otherwise, it is equal to the character at index <i>k-n</i> in the
284 * argument {@code sb}.
285 * <p>
286 * This method synchronizes on {@code this}, the destination
287 * object, but does not synchronize on the source ({@code sb}).
288 *
289 * @param sb the {@code StringBuffer} to append.
290 * @return a reference to this object.
291 * @since 1.4
292 */
293 public synchronized StringBuffer append(StringBuffer sb) {
294 super.append(sb);
295 return this;
296 }
297
298 /**
299 * @since 1.8
300 */
301 @Override
302 synchronized StringBuffer append(AbstractStringBuilder asb) {
303 super.append(asb);
304 return this;
305 }
306
307 /**
308 * Appends the specified {@code CharSequence} to this
309 * sequence.
310 * <p>
311 * The characters of the {@code CharSequence} argument are appended,
312 * in order, increasing the length of this sequence by the length of the
313 * argument.
314 *
315 * <p>The result of this method is exactly the same as if it were an
316 * invocation of this.append(s, 0, s.length());
317 *
318 * <p>This method synchronizes on {@code this}, the destination
319 * object, but does not synchronize on the source ({@code s}).
320 *
321 * <p>If {@code s} is {@code null}, then the four characters
322 * {@code "null"} are appended.
323 *
324 * @param s the {@code CharSequence} to append.
325 * @return a reference to this object.
326 * @since 1.5
327 */
328 @Override
329 public synchronized StringBuffer append(CharSequence s) {
330 super.append(s);
331 return this;
332 }
333
334 /**
335 * @throws IndexOutOfBoundsException {@inheritDoc}
336 * @since 1.5
337 */
338 @Override
339 public synchronized StringBuffer append(CharSequence s, int start, int end)
340 {
341 super.append(s, start, end);
342 return this;
343 }
344
345 @Override
346 public synchronized StringBuffer append(char[] str) {
347 super.append(str);
348 return this;
349 }
350
351 /**
352 * @throws IndexOutOfBoundsException {@inheritDoc}
353 */
354 @Override
355 public synchronized StringBuffer append(char[] str, int offset, int len) {
356 super.append(str, offset, len);
357 return this;
358 }
359
360 @Override
361 public synchronized StringBuffer append(boolean b) {
362 super.append(b);
363 return this;
364 }
365
366 @Override
367 @HotSpotIntrinsicCandidate
368 public synchronized StringBuffer append(char c) {
369 super.append(c);
370 return this;
371 }
372
373 @Override
374 @HotSpotIntrinsicCandidate
375 public synchronized StringBuffer append(int i) {
376 super.append(i);
377 return this;
378 }
379
380 /**
381 * @since 1.5
382 */
383 @Override
384 public synchronized StringBuffer appendCodePoint(int codePoint) {
385 super.appendCodePoint(codePoint);
386 return this;
387 }
388
389 @Override
390 public synchronized StringBuffer append(long lng) {
391 super.append(lng);
392 return this;
393 }
394
395 @Override
396 public synchronized StringBuffer append(float f) {
397 super.append(f);
398 return this;
399 }
400
401 @Override
402 public synchronized StringBuffer append(double d) {
403 super.append(d);
404 return this;
405 }
406
407 /**
408 * @throws StringIndexOutOfBoundsException {@inheritDoc}
409 * @since 1.2
410 */
411 @Override
412 public synchronized StringBuffer delete(int start, int end) {
413 super.delete(start, end);
414 return this;
415 }
416
417 /**
418 * @throws StringIndexOutOfBoundsException {@inheritDoc}
419 * @since 1.2
420 */
421 @Override
422 public synchronized StringBuffer deleteCharAt(int index) {
423 super.deleteCharAt(index);
424 return this;
425 }
426
427 /**
428 * @throws StringIndexOutOfBoundsException {@inheritDoc}
429 * @since 1.2
430 */
431 @Override
432 public synchronized StringBuffer replace(int start, int end, String str) {
433 super.replace(start, end, str);
434 return this;
435 }
436
437 /**
438 * @throws StringIndexOutOfBoundsException {@inheritDoc}
439 * @since 1.2
440 */
441 @Override
442 public synchronized String substring(int start) {
443 return substring(start, count);
444 }
445
446 /**
447 * @throws IndexOutOfBoundsException {@inheritDoc}
448 * @since 1.4
449 */
450 @Override
451 public synchronized CharSequence subSequence(int start, int end) {
452 return super.substring(start, end);
453 }
454
455 /**
456 * @throws StringIndexOutOfBoundsException {@inheritDoc}
457 * @since 1.2
458 */
459 @Override
460 public synchronized String substring(int start, int end) {
461 return super.substring(start, end);
462 }
463
464 /**
465 * @throws StringIndexOutOfBoundsException {@inheritDoc}
466 * @since 1.2
467 */
468 @Override
469 public synchronized StringBuffer insert(int index, char[] str, int offset,
470 int len)
471 {
472 super.insert(index, str, offset, len);
473 return this;
474 }
475
476 /**
477 * @throws StringIndexOutOfBoundsException {@inheritDoc}
478 */
479 @Override
480 public synchronized StringBuffer insert(int offset, Object obj) {
481 super.insert(offset, String.valueOf(obj));
482 return this;
483 }
484
485 /**
486 * @throws StringIndexOutOfBoundsException {@inheritDoc}
487 */
488 @Override
489 public synchronized StringBuffer insert(int offset, String str) {
490 super.insert(offset, str);
491 return this;
492 }
493
494 /**
495 * @throws StringIndexOutOfBoundsException {@inheritDoc}
496 */
497 @Override
498 public synchronized StringBuffer insert(int offset, char[] str) {
499 super.insert(offset, str);
500 return this;
501 }
502
503 /**
504 * @throws IndexOutOfBoundsException {@inheritDoc}
505 * @since 1.5
506 */
507 @Override
508 public StringBuffer insert(int dstOffset, CharSequence s) {
509 // Note, synchronization achieved via invocations of other StringBuffer methods
510 // after narrowing of s to specific type
511 super.insert(dstOffset, s);
512 return this;
513 }
514
515 /**
516 * @throws IndexOutOfBoundsException {@inheritDoc}
517 * @since 1.5
518 */
519 @Override
520 public synchronized StringBuffer insert(int dstOffset, CharSequence s,
521 int start, int end)
522 {
523 super.insert(dstOffset, s, start, end);
524 return this;
525 }
526
527 /**
528 * @throws StringIndexOutOfBoundsException {@inheritDoc}
529 */
530 @Override
531 public StringBuffer insert(int offset, boolean b) {
532 // Note, synchronization achieved via invocation of StringBuffer insert(int, String)
533 // after conversion of b to String by super class method
534 super.insert(offset, b);
535 return this;
536 }
537
538 /**
539 * @throws IndexOutOfBoundsException {@inheritDoc}
540 */
541 @Override
542 public synchronized StringBuffer insert(int offset, char c) {
543 super.insert(offset, c);
544 return this;
545 }
546
547 /**
548 * @throws StringIndexOutOfBoundsException {@inheritDoc}
549 */
550 @Override
551 public StringBuffer insert(int offset, int i) {
552 // Note, synchronization achieved via invocation of StringBuffer insert(int, String)
553 // after conversion of i to String by super class method
554 super.insert(offset, i);
555 return this;
556 }
557
558 /**
559 * @throws StringIndexOutOfBoundsException {@inheritDoc}
560 */
561 @Override
562 public StringBuffer insert(int offset, long l) {
563 // Note, synchronization achieved via invocation of StringBuffer insert(int, String)
564 // after conversion of l to String by super class method
565 super.insert(offset, l);
566 return this;
567 }
568
569 /**
570 * @throws StringIndexOutOfBoundsException {@inheritDoc}
571 */
572 @Override
573 public StringBuffer insert(int offset, float f) {
574 // Note, synchronization achieved via invocation of StringBuffer insert(int, String)
575 // after conversion of f to String by super class method
576 super.insert(offset, f);
577 return this;
578 }
579
580 /**
581 * @throws StringIndexOutOfBoundsException {@inheritDoc}
582 */
583 @Override
584 public StringBuffer insert(int offset, double d) {
585 // Note, synchronization achieved via invocation of StringBuffer insert(int, String)
586 // after conversion of d to String by super class method
587 super.insert(offset, d);
588 return this;
589 }
590
591 /**
592 * @since 1.4
593 */
594 @Override
595 public int indexOf(String str) {
596 // Note, synchronization achieved via invocations of other StringBuffer methods
597 return super.indexOf(str);
598 }
599
600 /**
601 * @since 1.4
602 */
603 @Override
604 public synchronized int indexOf(String str, int fromIndex) {
605 return super.indexOf(str, fromIndex);
606 }
610 */
611 @Override
612 public int lastIndexOf(String str) {
613 // Note, synchronization achieved via invocations of other StringBuffer methods
614 return lastIndexOf(str, count);
615 }
616
617 /**
618 * @since 1.4
619 */
620 @Override
621 public synchronized int lastIndexOf(String str, int fromIndex) {
622 return super.lastIndexOf(str, fromIndex);
623 }
624
625 /**
626 * @since 1.0.2
627 */
628 @Override
629 public synchronized StringBuffer reverse() {
630 super.reverse();
631 return this;
632 }
633
634 @Override
635 @HotSpotIntrinsicCandidate
636 public synchronized String toString() {
637 final byte[] value = this.value;
638 if (isLatin1()) {
639 if ((count << coder) < value.length) {
640 return StringLatin1.newString(value, 0, count);
641 }
642 shared = true;
643 return new String(value, String.LATIN1);
644 }
645 return StringUTF16.newString(value, 0, count);
646 }
647
648 /**
649 * Serializable fields for StringBuffer.
650 *
651 * @serialField value char[]
652 * The backing character array of this StringBuffer.
653 * @serialField count int
654 * The number of characters in this StringBuffer.
655 * @serialField shared boolean
656 * A flag indicating whether the backing array is shared.
657 * The value is ignored upon deserialization.
658 */
659 private static final java.io.ObjectStreamField[] serialPersistentFields =
660 {
661 new java.io.ObjectStreamField("value", char[].class),
662 new java.io.ObjectStreamField("count", Integer.TYPE),
663 new java.io.ObjectStreamField("shared", Boolean.TYPE),
664 };
665
675 StringLatin1.getChars(value, 0, count, val, 0);
676 } else {
677 StringUTF16.getChars(value, 0, count, val, 0);
678 }
679 fields.put("value", val);
680 fields.put("count", count);
681 fields.put("shared", false);
682 s.writeFields();
683 }
684
685 /**
686 * readObject is called to restore the state of the StringBuffer from
687 * a stream.
688 */
689 private void readObject(java.io.ObjectInputStream s)
690 throws java.io.IOException, ClassNotFoundException {
691 java.io.ObjectInputStream.GetField fields = s.readFields();
692 char[] val = (char[])fields.get("value", null);
693 initBytes(val, 0, val.length);
694 count = fields.get("count", 0);
695 shared = false;
696 }
697
698 synchronized void getBytes(byte dst[], int dstBegin, byte coder) {
699 super.getBytes(dst, dstBegin, coder);
700 }
701 }
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