Latest Java Aptitude Question SOLUTION: class MyLogger { private StringBuilder logger = new StringBuilder(); public void log(String message, String user) { logger.append(message); logger.append(user); } } The programm

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(#M40167123) JAVA Programming question StringBuilder vs StringBuffer Keep an EYE

class MyLogger
{
private StringBuilder logger = new StringBuilder();
public void log(String message, String user)
{
logger.append(message);
logger.append(user);
}
}

The programmer must guarantee that a single MyLogger object works properly for a multi threaded system. How must this code be changed to be thread-safe?

A. Replace StringBuilder with StringBuffer

B. Replace StringBuilder with just a String object and use the string concatenation (+=) within the log method.

C. No change is necessary, the current MyLogger code is already thread-safe.

D. Synchronize the log method

Asked In Java Jax (2 years ago)

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