????? stringbuffer? stringbuilder? ???? ??????
Jul 02, 2020 pm 02:14 PM
????? stringbuffer? stringbuilder? ???? ??? ????. 1. StringBuffer? ?????? ????? StringBuilder? ?????? ???? ????. 2. StringBuffer? ??? ???? ????? StringBuilder? ??? ????.
????? stringbuffer? stringbuilder? ???? ??? ????.
??? 1: ??? ???
StringBuffer: ??? ??, StringBuilder: ??? ???? ??. StringBuffer? ?? ?? ???? ????? StringBuilder? StringBuilder? ???? ?? ?????.
StringBuffer ?? ??:
@Override
public synchronized StringBuffer append(String str) {
toStringCache = null;
super.append(str);
return this;
}?? 2: ??
StringBuffer ?? ??:
private transient char[] toStringCache;
@Override
public synchronized String toString() {
if (toStringCache == null) {
toStringCache = Arrays.copyOfRange(value, 0, count);
}
return new String(toStringCache, true);
}StringBuilder ?? ??:
@Override
public String toString() {
// Create a copy, don't share the array
return new String(value, 0, count);
}StringBuffer? toString? ??? ??? toStringCache ?? ?? ????? ?? ? ? ????. ?? ??? ?????.
StringBuilder? ?? ?? ??? ??? ?? ???? ???? ???.
??? ?? ???? StringBuffer? ?????? StringBuffer? toString ???? ??? ??????.
??? 3: ??
StringBuffer? ?????? ???? ??? ?? ?? ???? ????? StringBuilder? ???? ???? ????? ???? StringBuilder? ??? StringBuffer?? ?? ??? ?? ??? ??? ????.
?? ?? ????: Java ??? ????
? ??? ????? stringbuffer? stringbuilder? ???? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!
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StringBuilder? ??? ??? ??????
Oct 12, 2023 pm 04:57 PM
stringbuilder? ??? ??? ??? ????. 1. setLength(0) ???? ???? StringBuilder ??? ????. 2. delete(0, length) ???? ???? StringBuilder ??? ????. 3. ??(0, length, ")? ?????. ") ???? ???? StringBuilder ??? ????. 4. , new StringBuilder()? ???? ? StringBuilder ??? ?? ????.
Java?? StringBuilder ???? delete() ???? ???? ??? ??? ??? ?????.
Jul 26, 2023 pm 08:43 PM
??? ??? ??? ????? Java?? StringBuilder ???? delete() ???? ?????. String ???? Java?? ????? ???? ??? ?? ??????. ??? ?? ???? ???? ?? ???? ?? String ???? ????? ?? ? ??? ??? ?? ???? ??? ??? ????. ? ??? ???? ?? Java? StringBuilder ???? ?????.
???? Java? StringBuilder? ??
Sep 02, 2023 pm 03:57 PM
StringBuilder ????append() ???? String ?? ?? ?? ??? ?????. ??? ?? StringBuilder ??? ?? - ??? ?? ?????. stringBuilder? ???? ????? Append() ???? ???? ?????. ?? ?? Java ??????? ??? ??? ?? StringBuilder ??? ?????. ??? ?? publicclassStringToStringBuilder{ publicstaticvoidmain(Stringargs[]){&a
Java ?? ??: StringBuilder ???? substring() ???? ?? ??? ??
Nov 03, 2023 pm 04:31 PM
Java ?? ??: StringBuilder ???? substring() ???? ?? ??? ?? ??: Java ??????? ??? ??? ?? ???? ?? ? ?????. Java? ??? ??? ?? ??? ???? ???? ????, ?? StringBuilder ???? ?? ???? ??? ??? ????? ?????. StringBuilder ????? substring() ???? ???? ?? ???? ???? ? ?? ??? ??????. ? ???
Jul 24, 2023 pm 06:12 PM
Java? StringBuilder.replace() ??? ???? ??? ?? ??? ????. Java?? StringBuilder ???? ????? ??? ?? ??? ??? ? ??? ? ?? replacement() ???? ?????. ? ???? ??? ??? ????. publicStringBuilderreplace(intstart,intend,Stringstr) ? ???? ??? ??? ??? ? ?????.
Jul 24, 2023 pm 09:37 PM
java? StringBuilder.insert() ??? ???? ?? ??? ???? ?????. StringBuilder? ???? ???? ??? ??? ???? Java? ??????. ???? ????? ???? ???? ??. ?? ???? insert() ??? ???? ??? ??? ???? ???? ??? ???? ?? ?? ??? ?????. ?? ??()
Java?? StringBuilder ???? substring() ??? ???? ???? ?? ???? ???? ??
Jul 24, 2023 pm 12:13 PM
Java??? ???? ?? ???? ???? ?? StringBuilder ???? substring() ??? ??? ?????? Java??? ??? ??? ???? ?? ??? ????. Java? StringBuilder ???? ??? ??? ???? ?? ??? ???? ?????. ? ? substring() ??? ???? ???? ?? ???? ??? ? ????. substring() ???? ? ?? ????? ??, ? substring(intstar)? ????.
Jul 25, 2023 am 09:31 AM
Java? StringBuilder ???? insert() ??? ??? ???? ??? ??? ???? ?????? Java ??????? String ???? ?? ?????? ??? ??? ???? ?? ?? ??? ? ????. ??? ?? ??? ?? ?? ??? ???? ? ?? ???? ???? ?? ??? ????. ? ??? ???? ?? Java? StringBuilder ???? ?????. StringBuilder? ??? ??? ? ?? ?? ??? ??????.
