1. Database
By: Greg
4/10/2017
Java 9 - GUI

2. JTable
The JTable is used to display and edit regular two-dimensional tables of cells.
Use DefaultTableModel object to manipulate data
Import:
javax.swing.table.DefaultTableModel;
4/10/2017
Java 9 - GUI

3. Database (JDBC)
Java programs communicate with databases and manipulate their data using the JDBC™API.
A JDBC driver enables Java applications to connect to a database in a DBMS and manipulate it using the JDBC API.
JDBC is almost always used with a relational database.
However, it can be used with any table-based data source.
4/10/2017
Java 9 - GUI

4. Manipulating Databases
Manipulating Databases with JDBC
JDBC supports four categories of drivers:
JDBC-to-ODBC bridge driver (Type 1)
connects Java programs to Microsoft ODBC (Open Database Connectivity) data sources.
Windows 64bit ??
Native-API, partly Java driver (Type 2)
almost similar to ODBC
Pure Java client to server driver (Type 3)
take JDBC requests and translate them into a network protocol that is not database specific. The requests are sent to a server, which translates it into a database-specific protocol.
Pure Java driver (Type 4)
implement database-specific network protocols, so that Java programs can connect directly to a database.
4/10/2017
Java 9 - GUI

5. Java driver RDBMS name JDBC driver Database URL format 4/10/2017
JDBC - ODBC
sun.jdbc.odbc.JdbcOdbcDriver
jdbc:odbc:odbcConnectionName
(Eg. jdbc:odbc:Data Barang)
Apache Derby
(included in JDK 7 and Netbean)
org.apache.derby.jdbc.ClientDriver
jdbc:derby:// hostname: portNumber /databaseName
(Eg. jdbc:derby://localhost:1527/Siswa SDN)
MySQL
com.mysql.jdbc.Driver
jdbc:mysql:// hostname: portNumber /databaseName
(Eg. jdbc:mysql://localhost:3306/Mydata )
MySQL/J
org.gjt.mm.mysql.Driver
(Eg. jdbc:mysql://localhost:3306/MyData )
SQL Server
com.microsoft.jdbc.sqlserver.SQLServerDriver
jdbc:microsoft:sqlserver://computerName:port Number;DatabaseName:databaseName
(Eg. jdbc:microsoft:sqlserver://PENTIUM:1433;DatabaseName:Northwind )
ORACLE
oracle.jdbc.driver.OracleDriver
portNumber: databaseName
(Eg.
4/10/2017
Java 9 - GUI

6. JavaDB (Java/Netbean Database) Apache Derby
Library:
derbyclient.jar (client-server)
derby.jar (direct connection)
default location:
C:\Program Files\Java\jdk1.7.0_25\db\lib
Add the library to the project before we used derby database server
4/10/2017
Java 9 - GUI

7. Create Connection Import Example: java.sql.Connection
java.sql.DriverManager
java.sql.SQLException
Example:
Connection cn = null;
//String nmClass = "sun.jdbc.odbc.JdbcOdbcDriver";
//String cs = "jdbc:odbc:Data Barang";
String nmClass = "org.apache.derby.jdbc.ClientDriver";
String cs = "jdbc:derby://localhost:1527/Siswa SDN";
try {
Class.forName(nmClass);
cn = DriverManager.getConnection(cs,”app","admin"); … }
catch(ClassNotFoundException cnfe){…}
catch(SQLException ex) {…}
4/10/2017
Java 9 - GUI

8. Create Connection (direct connection)
Import
java.sql.Connection
java.sql.DriverManager
java.sql.SQLException
Example:
Connection cn = null;
String nmClass = "org.apache.derby.jdbc.EmbeddedDriver";
String cs = "jdbc:derby:c:/java2/Siswa SDN";
try {
Class.forName(nmClass);
cn = DriverManager.getConnection(cs,”app","admin"); … }
catch(ClassNotFoundException cnfe){…}
catch(SQLException ex) {…}
4/10/2017
Java 9 - GUI

9. Close Connection Import Example: java.sql.Connection
java.sql.DriverManager
java.sql.SQLException
Example: …
try{
if(cn != null)
cn.close(); }
catch(SQLException ex){…}
4/10/2017
Java 9 - GUI

10. Create a statement
The program uses the Statement object to submit SQL to the database.
Import
java.sql.Statement
java.sql.SQLException
Example:
Statement stmt = null; …
try{
// stmt = cn.createStatement(); type scroll is TYPE_FORWARD_ONLY
stmt = cn.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY ); }
catch(SQLException ex){…}
4/10/2017
Java 9 - GUI

11. Execute Query Insert, Update, Delete Query Import
java.sql.SQLException
Example:
try{ …
String qry = “…”;
stmt = cn.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY );
stmt. execute(qry);
//stmt.executeUpdate(qry); }
catch(SQLException ex){…}
4/10/2017
Java 9 - GUI

12. Execute Query Select / Join Query Import Example: java.sql.ResultSet
java.sql.SQLException
Example:
Statement stmt = null;
private ResultSet rs;
try{ …
String qry = “…”;
stmt = cn.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY );
rs = stmt.executeQuery(qry); }
catch(SQLException ex){…}
4/10/2017
Java 9 - GUI

13. Query Examples Query Statement
insert into datasiswa (nama,nrp, aktif, nilai1, nilai2, nilai3)
values (‘Paijo’, ‘34311’, ‘Ya’, 60, 70, 85)
In the code:
String nma = “Paijo”;
String nrp = “34311”;
String akt = “Ya”;
int nil1 = 60, nil2 = 70, nil3 = 85;
String qry = "insert into datasiswa " +
"(nama,nrp, aktif, nilai1, nilai2, nilai3) "+
"values (‘”+ nma +”’, ‘”+ nrp + “’, ‘”+
akt +”’, “+ nil1 +”, “+ nil2 +”, “+ nil3 +”)”;
4/10/2017
Java 9 - GUI

14. Query Examples Query Statement update datasiswa
set aktif = ‘Tidak’, nilai1 = 60, nilai2 = 70, nilai3 = 85
where nama = ‘Paijo’ and nrp = ‘34311’
In the code:
String name = “Paijo”;
String id = “34311”;
String active = “Tidak”;
int score1 = 60, score2 = 70, score3 = 85;
String qry = “update datasiswa set aktif = ‘”+
active + “’, nilai1 = “ + score1 + “, nilai2 = “ +
score2 + “, nilai3 = “ + score3 +” where “ +
“nama = ‘” + name +”’ and nrp = ‘” + id + “’”;
4/10/2017
Java 9 - GUI

15. Query Examples Query Statement delete from datasiswa
where nama = ‘Paijo’ and nrp = ‘34311’
In the code:
String name = “Paijo”;
String id = “34311”;
String qry = “delete from datasiswa “+
“where nama = ‘” + name + “’ ” +
“and nrp = ‘” + id + “’ ”;
4/10/2017
Java 9 - GUI

16. Query Examples Query Statement Select * from datasiswa
where nama = ‘Paijo’ and nrp = ‘34311’
In the code:
String name = “Paijo”;
String id = “34311”;
String qry = “Select * from datasiswa “ +
“where nama = ‘” + name +
“’ and nrp = ‘” + id + “’”;
4/10/2017
Java 9 - GUI

17. Get the query result
rs = stmt.executeQuery("Select * from datasiswa");
int i = 0;
while(rs.next()){
name[i]= rs.getString("NAMA");
id[i]= rs.getString(2);
activ[i]= rs.getString("AKTIF");
score1[i]= rs.getDouble(4);
score2[i]= rs.getDouble("NILAI2");
score3[i]= rs.getDouble(6);
i++; }
4/10/2017
Java 9 - GUI

18. Count, AVG, Sum, Max, Min of the records
Example:
//Count record dalam datasiswa
rs = stmt.executeQuery("Select count(*) from datasiswa");
rs.next();
int a = rs.getInt(1);
//Hitung average dari field nilai1 untuk semua record
rs = stmt.executeQuery("Select avg(nilai1) from datasiswa");
float b = rs.getFloat(1);
4/10/2017
Java 9 - GUI

19. Join 2 Table Example: rs = stmt.executeQuery(
“SELECT idbarang,namabarang,namajenisbarang,” +
“masterbarang.deskripsi,kuantitas,harga " +
“FROM masterbarang, jenisbarang “ +
“WHERE masterbarang.idjenisbarang = “ +
“jenisbarang.idjenisbarang”);
4/10/2017
Java 9 - GUI