Difference between StringBuffer and StringBuilder in Java

StringBuffer :

StringBuffer Introduced In Java 1.0 version.
StringBuffer Is Thread Safe Class.
All method in the StringBuffer are Syncronized.
At speed StringBuffer is slow than the StringBuilder because of syncronization.

StringBuilder :

StringBulider Introduced In Java 5.0 version.
StringBuffer Is Non-Thread Safe Class.
All method are Non- Syncronized.
At speed StingBuilder is faster than the StringBuffer .