Differences between String, StringBuffer and StringBuilder (brief description) and stringbuilder

Differences between String, StringBuffer and StringBuilder (brief description) and stringbuilder

String: The public final modifier is used in the source code, indicating that the string value can only be assigned once. If the value is assigned again, a new space must be allocated.

StringBuffeR: inherited from AbstractStringBuilder, thread-safe, applicable to multi-thread operations

StringBuilder: Inherited from AbstractStringBuilder. The thread is not secure and is suitable for single-threaded operations.

Efficiency: StringBuilder> StringBuffer> String

From: http://www.cnblogs.com/sevenlin/p/sevenlin_StringBuffer_StringBuilder20150806.html