This method can round nanos or output them in scientific notation.

=== Here is the minimized test demonstrating the bug ===

import java.sql.Timestamp;
class java_sql_Timestamp1 {
  public static void main (String args[]) {
    Timestamp t1=new java.sql.Timestamp(96,8,13,5,8,13,2);
    System.out.println(t1);
    //will print "1996-09-13 05:08:13.0E-9" instead of "1996-09-13 05:08:13.000000002"
    Timestamp t2=new java.sql.Timestamp(96,8,13,5,8,13,499999998);
    System.out.println(t2);
    //will print "1996-09-13 05:08:13.5" instead of "1996-09-13 05:08:13.499999998 "
  }
}

=== Here is the test output ===
1996-09-13 05:08:13.0E-9
1996-09-13 05:08:13.5