STRINGBUILDER AND STRINGBUFFER

The java.lang package contains two classes for representing strings as a mutable sequence

of characters: StringBuilder and StringBuffer . The StringBuffer class has been around

since the fi rst version of Java, while StringBuilder was added in J2SE 5.0. The two classes

have the exact same method signatures and constructor parameters. The only difference

between them is that StringBuffer is thread - safe and StringBuilder is not. If you are

working with arrays of characters in a multithreaded application, use the StringBuffer

class. Otherwise, if threads are not an issue for your particular situation, use the String-

Builder class.