Overview of GUI Development Using NetBeans and Java

การเขียนโปรแกรมด้วย

NetBeans

อาจารย์สมเกียรติ ช่อเหมือน

สาขาวิชาวิศวกรรมซอฟต์แวร์ คณะวิทยาศาสตร์และเทคโนโลยี

(tko@webmail

npru.ac.th)

เนื้อหาการเรียนรู้

•

NetBeans IDE

•

JAVA Platform

•

Framework in NetBeans

•

GUI Form

ด้วย

Jframe

•

AWT Event Listeners

•

JDBC API

https://www.slideshare.net/nkpandey01/jdbc-by-nitesh

NetBeans IDE

•

เน็ตบีนส์ (

NetBeans)

เป็นเครื่องมือสำหรับนักโปรแกรมเมอร์ที่จะ

ใช้พัฒนา

Application

ด้วยภาษาจาวา

JAVA Platform

Framework in NetBeans

GUI Form

ด้วย

JFrame

•

Component Control

การจัดวาง

Layout

ใน

Frame

•

AWT (java.awt.Frame)

•

Swing JFrame (javax.swing.JFrame)

https://www.ntu.edu.sg/home/ehchua/programming/java/j4a_gui.html

http://www2.hawaii.edu/~takebaya/ics111/inheritance/inheritance.html

javax.swing.JFrame

package com.java.myapp;

import javax.swing.JFrame;

public class  MyClass {

    public static void main(String[] args) {

        JFrame frame = new JFrame("A JFrame");

        frame.setSize(250, 250);

        frame.setLocation(300,200);

        frame.setVisible(true);

https://www.thaicreate.com/java/java-gui-jframe.html

การสร้าง

GUI Form

Visual Designer

ด้วย

Component Controls

การปรับแต่งคุณสมบัติ

package

& import

•

package com.java.myapp;

•

import javax.swing.JComponent;

•

import javax.swing.JFrame;

•

import javax.swing.JLabel;

•

import javax.swing.JOptionPane;

•

import javax.swing.JPasswordField;

•

import javax.swing.JTextField;

•

import java.awt.Font;

Create Form & Add Component

// Create Form Frame

super("ThaiCreate.Com Tutorial");

setSize(679, 385);

setLocation(500, 280);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

getContentPane().setLayout(null);

//Add Label Welcome

lblWelcome = new JLabel("lblWelcome",JLabel.CENTER);

lblWelcome.setFont(new Font("Tahoma", Font.PLAIN, 20));

lblWelcome.setBounds(168, 153, 336, 25);

getContentPane().add(lblWelcome);

// When Frame Event Loaded

addWindowListener(new WindowAdapter() {

@Override

public void windowOpened(WindowEvent e) {

LoginDialog();

});

Object Get & Set text

double water = Double.parseDouble(Input1.getText());

double elec = Double.parseDouble(Input2.getText());

double oil = Double.parseDouble(Input3.getText());

double rent = Double.parseDouble(Input4.getText());

double exp = Double.parseDouble(Input5.getText());

http://javanetbeansgui.blogspot.com/2009/12/java-4.html

lblResult.setText(String.valueOf(water + elec + oil + rent + exp));

AWT Event Listeners

•

java.util.EventListener

–

ActionListener

–

ComponentListener

–

ItemListener

–

KeyListener

–

MouseListener

–

TextListener

–

WindowListener

–

AdjustmentListener

–

ContainerListener

–

MouseMotionListener

–

FocusListener

https://www.nytimes.com/guides/smarterliving/be-a-better-listener

AwtListenerDemo.java

•

import java.awt.event.*;

•

okButton.addActionListener(new CustomActionListener());

•

 class CustomActionListener implements ActionListener{

•

      public void actionPerformed(ActionEvent e) {

•

         statusLabel.setText("Ok Button Clicked.");

•

•

JDBC API

•

DataSource object

•

Connection object

•

Statement, PreparedStatement, and

CallableStatement objects

•

ResultSet object

Connecting Database Using JDBC

public class JDBCUtil {

    String className, URL, user, password;

    Connection connection;

    public JDBCUtil(String className, String URL, String user, String password) {

        this.className = className;

        this.URL = URL;

        this.user = user;

        this.password = password;

        this.connection = null;

    public void getConnection() {

        //Load the driver class

        try {

            Class.forName(className);

        } catch (ClassNotFoundException ex) {

            System.out.println("Unable to load the class. Terminating the program");

            System.exit(-1);

        //get the connection

        try {

            connection = DriverManager.getConnection(URL, user, password);

        } catch (SQLException ex) {

            System.out.println("Error getting connection: " + ex.getMessage());

            System.exit(-1);

        } catch (Exception ex) {

            System.out.println("Error: " + ex.getMessage());

            System.exit(-1);

https://www.progress.com/blogs/jdbc-tutorial-connecting-to-your-database-using-jdbc

https://www.oracle.com/database/technologies/appdev/jdbc.html

Ex. Login Username

และ

Password

Connection connect = null;

PreparedStatement pre = null;

Boolean status = false;

Class.forName("com.mysql.jdbc.Driver");

connect =  DriverManager.getConnection("jdbc:mysql://localhost/mydatabase?user=root&password=root");

String sql = " SELECT * FROM  member WHERE Username = ?  AND Password = ? ";

pre = connect.prepareStatement(sql);

pre.setString(1, userName);

pre.setString(2, passWord);

ResultSet rec = pre.executeQuery();

if(rec.next()) {

    lblWelcome.setText("Welcome : " + rec.getString("Name"));

    status = true;

https://www.thaicreate.com/java/java-gui-example-login-username-password.html

Database Metadata via JDBC Driver

databaseMetaData = connection.getMetaData();

//Print TABLE_TYPE "TABLE"

“

”

System.out.println("Printing TABLE_TYPE \"TABLE\" ");

System.out.println("----------------------------------");

while(resultSet.next())

    //Print

    System.out.println(resultSet.getString("TABLE_NAME"));

https://www.progress.com/blogs/jdbc-tutorial-extracting-database-metadata-via-jdbc-driver

http://tutorials.jenkov.com/jdbc/resultset.html

Table Info

•

getTables(String catalog, String Schema, String

tableNamepattern, string type)

Column Info

•

getColumns(String Schema, String catalog, String

tableNamePattern, String ColumnNamePattern)

สรุปท้ายบท

•

ชุดเครื่อง

NetBeans IDE

สามารถพัฒนาบน

JAVA Platform

ซึ่งมี

Framework

ในการพัฒนาโปรแกรม

•

การสร้าง

GUI Form

ด้วย

Jframe

และควบคุม

การโต้ตอบตามเหตุการณ์ด้วย

AWT Event Listeners

•

การเชื่อมต่อฐานข้อมูลด้วยการใช้

JDBC API

•

การใช้คำสั่ง

SQL

และใช้งานผ่าน

ResultSet

https://en.wikipedia.org/wiki/Event-driven_programming

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Explore the world of GUI development with NetBeans IDE and Java. Learn about building graphical user interfaces, utilizing event listeners, JDBC APIs, frameworks, and visual designers. Follow along with step-by-step instructions and visual examples to enhance your Java programming skills.

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Presentation Transcript

NetBeans (tko@webmail.npru.ac.th)

NetBeansIDE JAVA Platform Framework in NetBeans GUI Form Jframe AWT Event Listeners JDBC API https://www.slideshare.net/nkpandey01/jdbc-by-nitesh

NetBeans IDE (NetBeans) Application

JAVA Platform

Framework in NetBeans

GUI Form JFrame Component Control Layout Frame AWT (java.awt.Frame) Swing JFrame(javax.swing.JFrame) https://www.ntu.edu.sg/home/ehchua/programming/java/j4a_gui.html http://www2.hawaii.edu/~takebaya/ics111/inheritance/inheritance.html

javax.swing.JFrame packagecom.java.myapp; importjavax.swing.JFrame; publicclassMyClass { publicstaticvoidmain(String[] args) { JFrameframe = newJFrame("A JFrame"); frame.setSize(250, 250); frame.setLocation(300,200); frame.setVisible(true); } } https://www.thaicreate.com/java/java-gui-jframe.html

GUI Form

Visual DesignerComponent Controls

package& import package com.java.myapp; import javax.swing.JComponent; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPasswordField; import javax.swing.JTextField; import java.awt.Font;

Create Form & Add Component // Create Form Frame super("ThaiCreate.Com Tutorial"); setSize(679, 385); setLocation(500, 280); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); getContentPane().setLayout(null); //Add Label Welcome lblWelcome = new JLabel("lblWelcome",JLabel.CENTER); lblWelcome.setFont(new Font("Tahoma", Font.PLAIN, 20)); lblWelcome.setBounds(168, 153, 336, 25); getContentPane().add(lblWelcome); // When Frame Event Loaded addWindowListener(new WindowAdapter() { @Override public void windowOpened(WindowEvent e) { LoginDialog(); } });

Object Get & Set text double water = Double.parseDouble(Input1.getText()); double elec = Double.parseDouble(Input2.getText()); double oil = Double.parseDouble(Input3.getText()); double rent = Double.parseDouble(Input4.getText()); double exp = Double.parseDouble(Input5.getText()); lblResult.setText(String.valueOf(water + elec+ oil + rent + exp)); http://javanetbeansgui.blogspot.com/2009/12/java-4.html

AWT Event Listeners java.util.EventListener ActionListener ComponentListener ItemListener KeyListener MouseListener TextListener WindowListener AdjustmentListener ContainerListener MouseMotionListener FocusListener https://www.nytimes.com/guides/smarterliving/be-a-better-listener

AwtListenerDemo.java import java.awt.event.*; okButton.addActionListener(new CustomActionListener()); class CustomActionListener implements ActionListener{ public void actionPerformed(ActionEvent e) { statusLabel.setText("Ok Button Clicked."); } }

JDBC API DataSourceobject Connection object Statement, PreparedStatement, and CallableStatementobjects ResultSetobject

Connecting Database Using JDBC public class JDBCUtil { String className, URL, user, password; Connection connection; public JDBCUtil(String className, String URL, String user, String password) { this.className = className; this.URL = URL; this.user = user; this.password = password; this.connection = null; } public void getConnection() { //Load the driver class try { Class.forName(className); } catch (ClassNotFoundException ex) { System.out.println("Unable to load the class. Terminating the program"); System.exit(-1); } //get the connection try { connection = DriverManager.getConnection(URL, user, password); } catch (SQLException ex) { System.out.println("Error getting connection: " + ex.getMessage()); System.exit(-1); } catch (Exception ex) { System.out.println("Error: " + ex.getMessage()); System.exit(-1); } } } https://www.progress.com/blogs/jdbc-tutorial-connecting-to-your-database-using-jdbc https://www.oracle.com/database/technologies/appdev/jdbc.html

Ex. Login Username Password Connection connect = null; PreparedStatementpre = null; Boolean status = false; Class.forName("com.mysql.jdbc.Driver"); connect = DriverManager.getConnection("jdbc:mysql://localhost/mydatabase?user=root&password=root"); String sql= " SELECT * FROM member WHERE Username = ? AND Password = ? "; pre = connect.prepareStatement(sql); pre.setString(1, userName); pre.setString(2, passWord); ResultSetrec = pre.executeQuery(); if(rec.next()) { lblWelcome.setText("Welcome : " + rec.getString("Name")); status = true; } https://www.thaicreate.com/java/java-gui-example-login-username-password.html

Database Metadata via JDBC Driver databaseMetaData = connection.getMetaData(); //Print TABLE_TYPE "TABLE" ResultSet resultSet = databaseMetaData.getTables(null, null, null, new String[]{ TABLE }); System.out.println("Printing TABLE_TYPE \"TABLE\" "); System.out.println("----------------------------------"); while(resultSet.next()) { //Print System.out.println(resultSet.getString("TABLE_NAME")); } https://www.progress.com/blogs/jdbc-tutorial-extracting-database-metadata-via-jdbc-driver http://tutorials.jenkov.com/jdbc/resultset.html