Java notes------StringBuilder

1.StringBuilder Append(String str) Append string

2.StringBuilder Insert (int dstoffser, string str) inserts a string (the character in the Dstoffser position moves back)

3.StringBuilder Delete (int start, int end) deletes the string (the parameters of the defined range in Java, usually with a header without a tail). ）

4.StringBuilder replace (int start, int end, string str) Replacement string

5.StringBuilder Reverse() string inversion

StringBuilder and StringBuffer (as in the Inside method) differ:

----StringBuffer is thread-safe, synchronously processed, with slightly slower performance.

----StringBuilder is non-thread-safe, concurrently processed, with slightly faster performance.

Java notes------StringBuilder