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API 명세서 뜯어보기 - StringBuilder && StringBuffer Class

Package java.lang.Object java.lang.StringBuilder java.lang.StringBuffer StringBuilder 란? A mutable sequence of characters. This class provides an API compatible with StringBuffer, but with no guarantee of synchronization. This class is designed for use as a drop-in replacement for StringBuffer in places where the string buffer was being used by a single thread (as is generally the case). Where p..