Print warnings on a Connection to STDERR. : Connection « Database SQL JDBC « Java

Print warnings on a Connection to STDERR.

import java.sql.Connection;
import java.sql.SQLException;

 * Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
public class Main {

   * Print warnings on a Connection to STDERR.
   * @param conn Connection to print warnings from
  public static void printWarnings(Connection conn) {
      printWarnings(conn, new PrintWriter(System.err));

   * Print warnings on a Connection to a specified PrintWriter. 
   * @param conn Connection to print warnings from
   * @param pw PrintWriter to print to
  public static void printWarnings(Connection conn, PrintWriter pw) {
      if (conn != null) {
          try {
              printStackTrace(conn.getWarnings(), pw);
          } catch (SQLException e) {
              printStackTrace(e, pw);

   * Print the stack trace for a SQLException to a 
   * specified PrintWriter. 
   * @param e SQLException to print stack trace of
   * @param pw PrintWriter to print to
  public static void printStackTrace(SQLException e, PrintWriter pw) {

      SQLException next = e;
      while (next != null) {
          next = next.getNextException();
          if (next != null) {
              pw.println("Next SQLException:");



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