Which two scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object? (Choose two.)
A. When using versions of Java technology earlier than 5.0.
B. When sharing a StringBuffer among multiple threads.
C. When using the java.io class StringBufferInputStream.
D. When you plan to reuse the StringBuffer to build more than one string.
Answer:A
Which two scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object? (Choose two.)
A. When using versions of Java technology earlier than 5.0. B. When sharing a StringBuffer among multiple threads. C. When using the java.io class StringBufferInputStream. D. When you plan to reuse the StringBuffer to build more than one string.