Course.java (Online at www.xp123.comrwb )


Course.java (Online at www.xp123.com/rwb )

 import java.sql.*; public class Course {     private String name;     private int credits;     static String url = "jdbc:odbc:Reggie";     static { try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); }              catch (Exception ignored) {} }     public static Course create(String name, int credits)         throws Exception     {       Connection conn = null;       try {           conn = DriverManager.getConnection(url, "", "");           Statement statement = conn.createStatement();           statement.executeUpdate(               "DELETE FROM course WHERE name = '" + name + "';");           statement.executeUpdate(               "INSERT INTO course VALUES ('" + name               + "', '" + credits + "');");           return new Course(name, credits);       } finally {           try { conn.close(); } catch (Exception ignored) {}       }     }     public static Course find(String name) {         Connection conn = null;         try {             conn = DriverManager.getConnection(url, "", "");             Statement statement = conn.createStatement();             ResultSet result = statement.executeQuery(                 "SELECT * FROM course WHERE Name = '" + name + "';");             if (!result.next()) return null;             int credits = result.getInt("Credits");             return new Course(name, credits);         } catch (Exception ex) {             return null;         } finally {             try { conn.close(); } catch (Exception ignored) {}         }     }     public void update() throws Exception {         Connection conn = null;         try {             conn = DriverManager.getConnection(url, "", "");             Statement statement = conn.createStatement();             statement.executeUpdate(                 "DELETE FROM COURSE WHERE name = '" + name + "';");             statement.executeUpdate(                 "INSERT INTO course VALUES('" +                 name + "','" + credits + "');");         } finally {             try { conn.close(); } catch (Exception ignored) {}         }     }     Course(String name, int credits) {         this.name = name;         this.credits = credits;     }     public int getCredits() {         return credits;     }     public String getName() {         return name;     } } 


Refactoring Workbook
Refactoring Workbook
ISBN: 0321109295
EAN: 2147483647
Year: 2003
Pages: 146

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