When an exception occurs, this code snippet will print the stack trace of the exception to a string. This way, the exception stack trace at runtime can be recorded in log file.
import java.io.PrintWriter;
import java.io.StringWriter;
public static String getStackTrace(Throwable t)
{
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw, true);
t.printStackTrace(pw);
pw.flush();
sw.flush();
return sw.toString();
}