//: strings/DatabaseException.java public class DatabaseException extends Exception { public DatabaseException(int transactionID, int queryID, String message) { super(String.format("(t%d, q%d) %s", transactionID, queryID, message)); } public static void main(String[] args) { try { throw new DatabaseException(3, 7, "Write failed"); } catch(Exception e) { System.out.println(e); } } } /* Output: DatabaseException: (t3, q7) Write failed *///:~