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Java Source | 2000-05-25 | 5.0 KB | 143 lines |
- //: VLookup.java
- //////////////////////////////////////////////////
- // Copyright (c) Bruce Eckel, 1998
- // Source code file from the book "Thinking in Java"
- // All rights reserved EXCEPT as allowed by the
- // following statements: You can freely use this file
- // for your own work (personal or commercial),
- // including modifications and distribution in
- // executable form only. Permission is granted to use
- // this file in classroom situations, including its
- // use in presentation materials, as long as the book
- // "Thinking in Java" is cited as the source.
- // Except in classroom situations, you cannot copy
- // and distribute this code; instead, the sole
- // distribution point is http://www.BruceEckel.com
- // (and official mirror sites) where it is
- // freely available. You cannot remove this
- // copyright and notice. You cannot distribute
- // modified versions of the source code in this
- // package. You cannot use this file in printed
- // media without the express permission of the
- // author. Bruce Eckel makes no representation about
- // the suitability of this software for any purpose.
- // It is provided "as is" without express or implied
- // warranty of any kind, including any implied
- // warranty of merchantability, fitness for a
- // particular purpose or non-infringement. The entire
- // risk as to the quality and performance of the
- // software is with you. Bruce Eckel and the
- // publisher shall not be liable for any damages
- // suffered by you or any third party as a result of
- // using or distributing software. In no event will
- // Bruce Eckel or the publisher be liable for any
- // lost revenue, profit, or data, or for direct,
- // indirect, special, consequential, incidental, or
- // punitive damages, however caused and regardless of
- // the theory of liability, arising out of the use of
- // or inability to use software, even if Bruce Eckel
- // and the publisher have been advised of the
- // possibility of such damages. Should the software
- // prove defective, you assume the cost of all
- // necessary servicing, repair, or correction. If you
- // think you've found an error, please email all
- // modified files with clearly commented changes to:
- // Bruce@EckelObjects.com. (Please use the same
- // address for non-code errors found in the book.)
- /////////////////////////////////////////////////
-
- // GUI version of Lookup.java
- import java.awt.*;
- import java.awt.event.*;
- import java.applet.*;
- import java.sql.*;
-
- public class VLookup extends Applet {
- String dbUrl = "jdbc:odbc:people";
- String user = "";
- String password = "";
- Statement s;
- TextField searchFor = new TextField(20);
- Label completion =
- new Label(" ");
- TextArea results = new TextArea(40, 20);
- public void init() {
- searchFor.addTextListener(new SearchForL());
- Panel p = new Panel();
- p.add(new Label("Last name to search for:"));
- p.add(searchFor);
- p.add(completion);
- setLayout(new BorderLayout());
- add(p, BorderLayout.NORTH);
- add(results, BorderLayout.CENTER);
- try {
- // Load the driver (registers itself)
- Class.forName(
- "sun.jdbc.odbc.JdbcOdbcDriver");
- Connection c = DriverManager.getConnection(
- dbUrl, user, password);
- s = c.createStatement();
- } catch(Exception e) {
- results.setText(e.getMessage());
- }
- }
- class SearchForL implements TextListener {
- public void textValueChanged(TextEvent te) {
- ResultSet r;
- if(searchFor.getText().length() == 0) {
- completion.setText("");
- results.setText("");
- return;
- }
- try {
- // Name completion:
- r = s.executeQuery(
- "SELECT LAST FROM people.csv people " +
- "WHERE (LAST Like '" +
- searchFor.getText() +
- "%') ORDER BY LAST");
- if(r.next())
- completion.setText(
- r.getString("last"));
- r = s.executeQuery(
- "SELECT FIRST, LAST, EMAIL " +
- "FROM people.csv people " +
- "WHERE (LAST='" +
- completion.getText() +
- "') AND (EMAIL Is Not Null) " +
- "ORDER BY FIRST");
- } catch(Exception e) {
- results.setText(
- searchFor.getText() + "\n");
- results.append(e.getMessage());
- return;
- }
- results.setText("");
- try {
- while(r.next()) {
- results.append(
- r.getString("Last") + ", "
- + r.getString("fIRST") +
- ": " + r.getString("EMAIL") + "\n");
- }
- } catch(Exception e) {
- results.setText(e.getMessage());
- }
- }
- }
- public static void main(String[] args) {
- VLookup applet = new VLookup();
- Frame aFrame = new Frame("Email lookup");
- aFrame.addWindowListener(
- new WindowAdapter() {
- public void windowClosing(WindowEvent e) {
- System.exit(0);
- }
- });
- aFrame.add(applet, BorderLayout.CENTER);
- aFrame.setSize(500,200);
- applet.init();
- applet.start();
- aFrame.setVisible(true);
- }
- } ///:~