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Clicking on button doesn't retrieve data from database

So i'm trying to make a frame where it shows a list of every item in my database after you click on the button, but actually when i click on it nothing shows.
public ArrayList show(JTextArea tData) {
ArrayList<Book> books=new ArrayList<>();
try{
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
polaczenie =DriverManager.getConnection("jdbc:sqlserver://localhost;databaseName=master",
"sa", "student");
try(Statement stmt = connection.createStatement();) {
ResultSet rs = stmt.executeQuery("{call dbo.showBook}");
while (rs.next()) {
books.add(new Book(
rs.getString("bookNumber"),
rs.getString("title"),
rs.getString("author"),
rs.getString("publicationYear"),
rs.getString("publisher"))
);
}
}
}
catch (ClassNotFoundException ex) {
JOptionPane.showMessageDialog(null, "Error "+ex.getMessage(), "Error", 0);
}
catch (SQLException ex) {
JOptionPane.showMessageDialog(null, "Error "+ex.getMessage(), "Error", 0);
}
return books;
}
private void bShowActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
DataBook db=new DataBook();
db.show(tData);
}

Your show method will return a ArrayList<Book>
So:
Have you processed this to display data from the list?
Does your database have data yet ?
"Sorry I can't add comment because my reputation < 50 "
Hope it helps you.
package test;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JTextArea;
public class App extends JFrame {
JPanel contentPane;
JButton action;
JList<Book> listBooks;
public App() {
this.prepareGUI();
}
public void prepareGUI() {
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setSize(200, 200);
contentPane = new JPanel();
this.setContentPane(contentPane);
action = new JButton("Action");
contentPane.add(action);
listBooks = new JList<Book>();
contentPane.add(listBooks);
action.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
// Data
Book[] books = new Book[5];
for (int i = 0; i < books.length; i++) {
books[i] = new Book("book " + i, "##");
}
listBooks.setListData(books);
}
});
}
public static void main(String[] args) {
App app = new App();
app.setVisible(true);
}
}
Hope this help you!!!

Deleting rows with right click from MySql table in JTable

I have a Java class as shown below which displays my table from my database. I want to add a function that will open a pop-up menu and delete row from table. How can i do that?
import java.awt.BorderLayout;
import javax.swing.*;
import java.sql.*;
import java.util.Vector;
public class Test {
public static void main(String[] args) {
Connection con = null;
Statement st = null;
ResultSet rs = null;
String s;
try {
con = DriverManager.getConnection("jdbc:mysql://localhost/sms", "root", "");
st = con.createStatement();
s = "select * from sent_messages";
rs = st.executeQuery(s);
ResultSetMetaData rsmt = rs.getMetaData();
int c = rsmt.getColumnCount();
Vector column = new Vector(c);
for (int i = 1; i <= c; i++) {
column.add(rsmt.getColumnName(i));
}
Vector data = new Vector();
Vector row = new Vector();
while (rs.next()) {
row = new Vector(c);
for (int i = 1; i <= c; i++) {
row.add(rs.getString(i));
}
data.add(row);
}
JFrame frame = new JFrame();
frame.setSize(500, 600);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
JTable table = new JTable(data, column);
JScrollPane jsp = new JScrollPane(table);
panel.setLayout(new BorderLayout());
panel.add(jsp, BorderLayout.CENTER);
frame.setContentPane(panel);
frame.setVisible(true);
} catch (Exception e) {
JOptionPane.showMessageDialog(null, "ERROR");
} finally {
try {
st.close();
rs.close();
con.close();
} catch (Exception e) {
JOptionPane.showMessageDialog(null, "ERROR CLOSE");
}
}
}
}
And as a reference i looked to this page but i couldn't bind method from here.

I found an example and i took it as a reference.
I got to handle and rewrite the code as 3 classes shown below:
JTablePopupMenuExample.java
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.Statement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.Vector;
import javax.swing.JFrame;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.table.DefaultTableModel;
public class JTablePopupMenuExample extends JFrame implements ActionListener {
private JTable table;
private DefaultTableModel tableModel;
private JPopupMenu popupMenu;
private JMenuItem menuItemAdd;
private JMenuItem menuItemRemove;
private JMenuItem menuItemRemoveAll;
List<SentMessagesTable> msgList;
public JTablePopupMenuExample() throws Exception{
super("JTable Popup Menu Example");
// sample table data
String[] columnNames = new String[] {"id", "receiver", "sender", "msg_text", "status", "x_date"};
msgList = new ArrayList<SentMessagesTable>();
ResultSet rs = getTableRows();
while (rs.next()) {
SentMessagesTable msg = new SentMessagesTable();
msg.setId(rs.getInt("id"));
msg.setReceiver(rs.getString("receiver"));
msg.setSender(rs.getString("sender"));
msg.setMsgText(rs.getString("msg_text"));
msg.setStatus(rs.getString("status"));
msg.setxDate(rs.getString("x_date"));
msgList.add(msg);
}
String[][] rowDataTable = new String[34400][6];
for(int i = 0 ; i < msgList.size();i++) {
//burda jtable listesini doldur
rowDataTable[i][0] = String.valueOf(msgList.get(i).getId());
rowDataTable[i][1] = msgList.get(i).getReceiver();
rowDataTable[i][2] = msgList.get(i).getSender();
rowDataTable[i][3] = msgList.get(i).getMsgText();
rowDataTable[i][4] = msgList.get(i).getStatus();
rowDataTable[i][5] = msgList.get(i).getxDate();
}
// constructs the table with sample data
tableModel = new DefaultTableModel(rowDataTable, columnNames);
table = new JTable(tableModel);
// constructs the popup menu
popupMenu = new JPopupMenu();
menuItemAdd = new JMenuItem("Add New Row");
menuItemRemove = new JMenuItem("Remove Current Row");
menuItemRemoveAll = new JMenuItem("Remove All Rows");
menuItemAdd.addActionListener(this);
menuItemRemove.addActionListener(this);
menuItemRemoveAll.addActionListener(this);
popupMenu.add(menuItemAdd);
popupMenu.add(menuItemRemove);
popupMenu.add(menuItemRemoveAll);
// sets the popup menu for the table
table.setComponentPopupMenu(popupMenu);
table.addMouseListener(new TableMouseListener(table));
// adds the table to the frame
add(new JScrollPane(table));
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(800,1000);
setLocationRelativeTo(null);
}
public static void main(String[] args){
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
try {
new JTablePopupMenuExample().setVisible(true);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
#Override
public void actionPerformed(ActionEvent event) {
JMenuItem menu = (JMenuItem) event.getSource();
if (menu == menuItemAdd) {
addNewRow();
} else if (menu == menuItemRemove) {
removeCurrentRow();
} else if (menu == menuItemRemoveAll) {
removeAllRows();
}
}
private void addNewRow() {
tableModel.addRow(new String[0]);
}
private void removeCurrentRow(){
int selectedRow = table.getSelectedRow();
tableModel.removeRow(selectedRow);
String jdbcUrl = "jdbc:mysql://localhost/sms";
String username = "root";
String password = "";
String sql = "delete from sent_messages where id = '"+msgList.get(selectedRow).getId()+"'";
// java.sql.Statement stmt = null;
try (Connection conn = DriverManager.getConnection(jdbcUrl, username, password);
java.sql.Statement stmt = conn.createStatement();) {
stmt.executeUpdate(sql);
System.out.println("Record deleted successfully");
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void removeAllRows() {
int rowCount = tableModel.getRowCount();
for (int i = 0; i < rowCount; i++) {
tableModel.removeRow(0);
}
}
private ResultSet getTableRows() throws SQLException {
Connection con = null;
java.sql.Statement st = null;
ResultSet rs = null;
String s;
try {
con = DriverManager.getConnection("jdbc:mysql://localhost/sms", "root", "");
st = con.createStatement();
s = "select * from sent_messages";
rs = ((java.sql.Statement) st).executeQuery(s);
}catch(Exception e) {
System.out.println(e.toString());
}
finally {
//con.close();
}
return rs;
}
}
SentMessagesTable.java which involves (getters and setters)
public class SentMessagesTable {
int id;
String receiver;
String sender;
String msgText;
String status;
String xDate;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getReceiver() {
return receiver;
}
public void setReceiver(String receiver) {
this.receiver = receiver;
}
public String getSender() {
return sender;
}
public void setSender(String sender) {
this.sender = sender;
}
public String getMsgText() {
return msgText;
}
public void setMsgText(String msgText) {
this.msgText = msgText;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getxDate() {
return xDate;
}
public void setxDate(String xDate) {
this.xDate = xDate;
}
}
And TableMouse Listener.java
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JTable;
public class TableMouseListener extends MouseAdapter {
private JTable table;
public TableMouseListener(JTable table) {
this.table = table;
}
#Override
public void mousePressed(MouseEvent event) {
// selects the row at which point the mouse is clicked
Point point = event.getPoint();
int currentRow = table.rowAtPoint(point);
table.setRowSelectionInterval(currentRow, currentRow);
}
}
With that code i was able to delete records from JTable and also from my database.

Display ResultSet of a SQL query in a JTable (Java)

I'm working on a program with which I can search through a database and display the results.
I'm stuck at the displaying part at the moment. My SQL query already works and returns the results. I'm using a PreparedStatement to fill my ResultSet. However I don't know how I can return the data of the ResultSet to a JTable which I want to use to display the data. Can anyone explain to me in detail how to do this or if there is a better way instead of a JTable I'm not seeing?
I'm using the MVC model and the DAO pattern, but I'm still pretty new to programming.
So far from researching it I found the best solution to be to make a custom table class, but from there on I don't know how to progress.
My custom table class:
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.util.Vector;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;
public class ResultSetTable {
public static TableModel resultSetToTableModel(ResultSet rs) {
try {
ResultSetMetaData metaData = rs.getMetaData();
int numberOfColumns = metaData.getColumnCount();
Vector columnNames = new Vector();
//Spaltennamen
for (int column = 0; column < numberOfColumns; column++) {
columnNames.addElement(metaData.getColumnLabel(column + 1));
}
//Alle Zeilen
Vector rows = new Vector();
while (rs.next()) {
Vector newRow = new Vector();
for (int i = 1; i <= numberOfColumns; i++) {
newRow.addElement(rs.getObject(i));
}
rows.addElement(newRow);
}
return new DefaultTableModel(rows, columnNames);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
}
And the relevant part of my View class:
import java.awt.FlowLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.JTextField;
import dbconnect.dao.impl.BTRDaoImpl;
public class View extends JFrame{
public View() {
JTable table = new JTable(new ResultSetTable(BTRDaoImpl.resultset);
this.setSize(600, 400);
setResizable(false);
}
My BTRDaoImpl class with the sql query and resultset:
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Collection;
import mvc.View;
import dao.BTRbDao;
import business.BTRBean;
public class BTRDaoImpl extends AbstractDao implements BTRDao {
private Connection dbConnection = null;
private PreparedStatement preparedStatement = null;
public void sqlquery() {
try {
String btrname = View.searchbbtrname.getText();
String btrplz = View.searchbtrplz.getText();
btrname = btrname.trim().toUpperCase();
btrplz = btrplz.trim().toUpperCase();
if (btrplz.isEmpty()) {
String btrResult = "SELECT BBSTBBNR, BBSTNABE, BBSTPLZ FROM BP.TBBBST WHERE BBSTNABEG = ?";
dbConnection = AbstractDao.getConnection();
preparedStatement = dbConnection.prepareStatement(btrResult);
preparedStatement.setString(1, btrname);
} else {
String btrResult = "SELECT BBSTBBNR, BBSTNABE, BBSTPLZ FROM BP.TBBBST WHERE BBSTNABEG = ? AND BBSTPLZ = ?";
dbConnection = AbstractDao.getConnection();
preparedStatement = dbConnection.prepareStatement(btrResult);
preparedStatement.setString(1, btrname);
preparedStatement.setString(2, btrplz);
}
} catch (SQLException e1) {
System.out.println("An error with the SQL query occured: ");
e1.printStackTrace();
}
}
public Collection<BtrBean> getBTR() throws SQLException,
IOException {
sqlquery();
final Collection<BtrBean> result = new ArrayList<BtrBean>();
ResultSet resultset = null;
try {
resultset = preparedStatement.executeQuery();
// while loop to get data
while (resultset.next()) {
BtrBean btr = new BtrBean();
int btrid = resultset.getInt(1);
String btrplz = resultset.getString(3);
String btrname = resultset.getString(2);
btr.setBetriebnr(btrid);
btr.setBetriebplz(btrplz);
btr.setBetriebname(btrname);
result.add(btr);
// System.out.println("BTR-ID: " + btrid + " BTR PLZ: " + btrplz + " BTR: " + btrname);
}
} catch (SQLException e) {
e.printStackTrace();
System.out.println("An error processing the SQL occured: ");
e.printStackTrace();
} catch (NullPointerException npe) {
System.out.println("NullPointerException: ");
npe.printStackTrace();
} finally {
if (preparedStatement != null) preparedStatement.close();
closeConnection(resultset);
}
return result;
}
}
My BTRBean class:
public class BetriebBean {
private String betriebname;
private int betriebnr;
private String betriebplz;
public BetriebBean() {
}
public BetriebBean(String betriebname, int betriebnr, String betriebplz) {
super();
this.betriebname = betriebname;
this.betriebnr = betriebnr;
this.betriebplz = betriebplz;
}
public String getBetriebname() {
return betriebname;
}
public void setBetriebname(String betriebname) {
this.betriebname = betriebname;
}
public int getBetriebnr() {
return betriebnr;
}
public void setBetriebnr(int betriebnr) {
this.betriebnr = betriebnr;
}
public String getBetriebplz() {
return betriebplz;
}
public void setBetriebplz(String betriebplz) {
this.betriebplz = betriebplz;
}
}
//edit:
My whole View.class:
import java.awt.FlowLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.JTextField;
public class View extends JFrame{
private static final long serialVersionUID = 1L;
public static final String SEARCH = "SEARCH";
private JLabel searchbtrlabel = new JLabel("BTR name:");
public static JTextField searchbtrname = new JTextField(10);
private JLabel searchbtrlabel = new JLabel("PLZ:");
public static JTextField searchbtrplz = new JTextField(10);
private JButton searchbutton = new JButton();
public View() {
this.setTitle("BTR search TBBBST");
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setLayout(new FlowLayout());
this.add(searchbtrlabel);
this.add(searchbtrname);
this.add(searchbtrplzlabel);
this.add(searchbtrplz);
searchbutton.setText("Search");
searchbutton.setActionCommand(View.SEARCH);
this.add(searchbutton);
JTable table = new JTable();
this.add(table);
this.setSize(600, 400);
setResizable(false);
//this.pack();
}
public JTextField getSearchbtrname() {
return searchbetriebname;
}
public JTextField getSearchbbtrplz() {
return searchbetriebplz;
}
public JButton getSearchbutton() {
return searchbutton;
}
}
My Controller class:
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Observable;
import java.util.Observer;
import mvc.Model;
import dbconnect.dao.impl.BTRDaoImpl;
public class Controller implements Observer, ActionListener{
private Model model;
#SuppressWarnings("unused")
private View view;
public Controller(Model model, View view) {
this.model = model;
this.view = view;
model.addObserver(this);
view.getSearchbutton().addActionListener(this);
view.setVisible(true);
}
#Override
public void actionPerformed(ActionEvent e) {
switch (e.getActionCommand()) {
case View.SEARCH:
model.search();
view.table.setModel(ResultSetToTable.buildTableModel(BTRDaoImpl.resultset));
break;
default:
System.out.println("Error : " + e.getActionCommand());
break;
}
}
#Override
public void update(Observable o, Object arg) {
// TODO Auto-generated method stub
}
}

Firstly, include rs2xml.jar in your libraries. You can find it here
In whatever action to populate your MySQL query in your JTable use following general idea:
public void sqlquery() {
try {
String btrResult = "SELECT BBSTBBNR, BBSTNABE, BBSTPLZ FROM BP.TBBBST WHERE BBSTNABEG = ?";
preparedStatement = dbConnection.prepareStatement(btrResult);
dbConnection.setString(1, btrname);
ResultSet rs =dbConnection.executeQuery();
Ur_table_name.setModel(DbUtils.resultSetToTableModel(DbUtils.resultSetToel(rs)); //this line of code will show it in your JTable
}catch(Exception e){
}

What is your question? Try being more specific than "[...] but from there on I don't know how to progress." What do you want to do? Are the results from your query visible in the table?
Using the answer from Paul Vargas over here Most simple code to populate JTable from ResultSet, you could start with something like this (using Java 8):
import java.sql.*;
import java.util.Vector;
import javax.swing.*;
import javax.swing.table.*;
public class ResultSetToTable {
public static void main(final String[] arguments) {
SwingUtilities.invokeLater(() -> {
try {
new ResultSetToTable().createAndShowGui();
} catch (SQLException e) {
e.printStackTrace();
}
});
}
private void createAndShowGui() throws SQLException {
final JFrame frame = new JFrame("Stack Overflow");
frame.setBounds(100, 100, 800, 600);
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
final JPanel panel = new JPanel();
final TableModel tableModel = buildTableModel(getData("Audi"));
final JTable table = new JTable(tableModel);
panel.add(new JScrollPane(table));
frame.getContentPane().add(panel);
frame.setVisible(true);
}
private ResultSet getData(final String btrName) throws SQLException {
final String url = "jdbc:h2:/Freek/TBBBST";
final Connection connection = DriverManager.getConnection(url, "me", "123");
final String sql = "SELECT BBSTBBNR, BBSTNABE, BBSTPLZ " +
"FROM BP.TBBBST " +
"WHERE BBSTNABEG = ?";
final PreparedStatement preparedStatement = connection.prepareStatement(sql);
preparedStatement.setString(1, btrName);
return preparedStatement.executeQuery();
}
/**
* See https://stackoverflow.com/a/10625471/1694043
*/
public static TableModel buildTableModel(final ResultSet resultSet)
throws SQLException {
int columnCount = resultSet.getMetaData().getColumnCount();
// Column names.
Vector<String> columnNames = new Vector<>();
for (int columnIndex = 1; columnIndex <= columnCount; columnIndex++) {
columnNames.add(resultSet.getMetaData().getColumnName(columnIndex));
}
// Data of the table.
Vector<Vector<Object>> dataVector = new Vector<>();
while (resultSet.next()) {
Vector<Object> rowVector = new Vector<>();
for (int columnIndex = 1; columnIndex <= columnCount; columnIndex++) {
rowVector.add(resultSet.getObject(columnIndex));
}
dataVector.add(rowVector);
}
return new DefaultTableModel(dataVector, columnNames);
}
}
For older versions of Java, you should be able to use this version of the main method:
public static void main(final String[] arguments) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
try {
new ResultSetToTable().createAndShowGui();
} catch (SQLException e) {
e.printStackTrace();
}
}
});
}
Edit: connecting controller and table
To make the table available outside the view, you need to convert the table variable in the View() constructor into a field (like you have done with searchbtrname) and create a getTable getter method for it (like you have done with getSearchbtrname). In the Controller.actionPerformed method you can now change view.table into view.getTable().

Use wait() in Java

I need to create a new JFrame in a new Thread.. When I close the JFrame I need to return a String.
The problem is that the wait() method "doesn't wait" the "notify()" of new Thread.
Thank's for your answer.
import java.awt.Button;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.LayoutManager;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
public class FinestraTesto extends Thread {
JLabel jdescr;
JTextArea testo;
JPanel pannelloTasti;
JButton bottoneInvio;
JButton bottoneAnnulla;
JFrame finestraTestuale;
JPanel panAll;
static Boolean pause = true;
String titolo;
String descrizione;
private static String testoScritto = "";
public String mostra() {
// Create a new thread
Thread th = new Thread(new FinestraTesto(titolo, descrizione));
th.start();
synchronized (th) {
try {
// Waiting the end of th.
th.wait();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return testoScritto;
}
public void run() {
synchronized (this) {
System.out.println("Fatto 1 thread");
finestraTestuale = new JFrame(titolo);
finestraTestuale.setPreferredSize(new Dimension(600, 200));
finestraTestuale.setSize(600, 200);
Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
finestraTestuale.setLocation(
dim.width / 2 - finestraTestuale.getSize().width / 2,
dim.height / 2 - finestraTestuale.getSize().height / 2);
panAll = new JPanel();
panAll.setLayout(new BoxLayout(panAll, BoxLayout.Y_AXIS));
bottoneInvio = new JButton("Conferma");
bottoneAnnulla = new JButton("Annulla");
pannelloTasti = new JPanel();
testo = new JTextArea();
testo.setPreferredSize(new Dimension(550, 100));
testo.setSize(550, 100);
JScrollPane scrollPane = new JScrollPane();
scrollPane.setViewportView(testo);
jdescr = new JLabel(descrizione);
jdescr.setPreferredSize(new Dimension(550, 50));
jdescr.setSize(550, 50);
pannelloTasti.setLayout(new BoxLayout(pannelloTasti,
BoxLayout.X_AXIS));
pannelloTasti.add(bottoneInvio);
pannelloTasti.add(bottoneAnnulla);
panAll.add(jdescr);
panAll.add(scrollPane);
panAll.add(pannelloTasti);
finestraTestuale.add(panAll);
bottoneInvio.addActionListener(new ActionListener() {
#Override
/**
* metodo attivato quando c'è un'azione sul bottone
*/
public void actionPerformed(ActionEvent arg0) {
testoScritto = testo.getText();
pause = false;
finestraTestuale.show(false);
// send notify
notify();
}
});
bottoneAnnulla.addActionListener(new ActionListener() {
#Override
/**
* metodo attivato quando c'è un'azione sul bottone
*/
public void actionPerformed(ActionEvent arg0) {
pause = false;
testoScritto = "";
finestraTestuale.show(false);
// send notify
notify();
}
});
finestraTestuale.show();
}
}
public FinestraTesto(String titolo, String descrizione) {
this.titolo = titolo;
this.descrizione = descrizione;
}
}

You would better to use Synchronizers instead of wait and notify. They're more preferable because of simplicity and safety.
Given the difficulty of using wait and notify correctly, you should
use the higher-level concurrency utilities instead.
Effective Java (2nd Edition), Item 69

I solved with this class:
import java.awt.Dimension;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JRootPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
public class CustomDialog
{
private List<JComponent> components;
private String title;
private int messageType;
private JRootPane rootPane;
private String[] options;
private int optionIndex;
private JTextArea testo;
public CustomDialog(String title,String descrizione)
{
components = new ArrayList<>();
setTitle(title);
setMessageType(JOptionPane.PLAIN_MESSAGE);
addMessageText(descrizione);
testo = new JTextArea();
testo.setPreferredSize(new Dimension(550, 100));
testo.setSize(550, 100);
JScrollPane scrollPane = new JScrollPane();
scrollPane.setViewportView(testo);
addComponent(scrollPane);
setRootPane(null);
setOptions(new String[] { "Send", "Cancel" });
setOptionSelection(0);
}
public void setTitle(String title)
{
this.title = title;
}
public void setMessageType(int messageType)
{
this.messageType = messageType;
}
public void addComponent(JComponent component)
{
components.add(component);
}
public void addMessageText(String messageText)
{
components.add(new JLabel(messageText));
}
public void setRootPane(JRootPane rootPane)
{
this.rootPane = rootPane;
}
public void setOptions(String[] options)
{
this.options = options;
}
public void setOptionSelection(int optionIndex)
{
this.optionIndex = optionIndex;
}
public String show()
{
int optionType = JOptionPane.OK_CANCEL_OPTION;
Object optionSelection = null;
if(options.length != 0)
{
optionSelection = options[optionIndex];
}
int selection = JOptionPane.showOptionDialog(rootPane,
components.toArray(), title, optionType, messageType, null,
options, optionSelection);
if(selection == 0)
return testo.getText();
else
return null;
}
}

why JRadioButton is not selected even by using setSelected(true)

i only want one of the above button to be selected by default
but setSelected(true) is not working .
when i run the below program none of the JRadoiButton is selected
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class RadioDemo implements ActionListener {
String buttonName;
JPanel radioPanel=new JPanel();
ButtonGroup group = new ButtonGroup();
Enumeration enl;
int result;
ActionEvent e;
JRadioButton birdButton[];
int i;
Vector<JComponent> list;
Vector<String> listName;
public RadioDemo(Vector<JComponent> list,Vector<String> listName,Enumeration en,Enumeration enl)
{
birdButton=new JRadioButton[list.size()];
this.enl=enl;
this.list=list;
this.listName=listName;
for(i=0;i<list.size()-1;i++)
{
buttonName=(String)enl.nextElement();
birdButton[i] = new JRadioButton(buttonName);
birdButton[i].setSelected(false);
birdButton[i].setActionCommand(buttonName);
group.add(birdButton[i]);
birdButton[i].addActionListener(this);
radioPanel.add(birdButton[i]);
}
buttonName=(String)enl.nextElement();
birdButton[i] = new JRadioButton(buttonName);
birdButton[i].setSelected(true);
birdButton[i].setActionCommand(buttonName);
group.add(birdButton[i]);
birdButton[i].addActionListener(this);
radioPanel.add(birdButton[i]);
radioPanel.setLayout(new BoxLayout(radioPanel,BoxLayout.Y_AXIS));
//birdButton.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
result = JOptionPane.showConfirmDialog(null, radioPanel,
"Please choose", JOptionPane.OK_CANCEL_OPTION);
show();
}
/** Listens to the radio buttons. */
public void actionPerformed(ActionEvent e)
{
this.e=e;
}
public void show()
{
if (result == JOptionPane.OK_OPTION)
{ i=0;
while(!birdButton[i].isSelected())
{
i++;
System.out.println(i);
}
//list.removeElementAt(i);
//listName.removeElementAt(i);
System.out.println(i);
System.out.println(e.getActionCommand());
}
}
i also try birdButton[0].setSelected(true);
out of loop

You haven't posted how you call your constructor, so maybe there is something there. I slightly modified your code, added a main method and it seems to work ok. Take a look at it:
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Vector;
import javax.swing.BoxLayout;
import javax.swing.ButtonGroup;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.SwingUtilities;
public class RadioDemo implements ActionListener {
String buttonName;
JPanel radioPanel = new JPanel();
ButtonGroup group = new ButtonGroup();
int result;
JRadioButton birdButton[];
Vector<String> listName;
private JRadioButton selectedButton;
public RadioDemo(Vector<String> listName) {
birdButton = new JRadioButton[listName.size()];
this.listName = listName;
int i = 0;
for (String buttonName : listName) {
birdButton[i] = new JRadioButton(buttonName);
if (i == 0) {
birdButton[i].setSelected(true);
selectedButton = birdButton[i];
}
birdButton[i].setActionCommand(buttonName);
group.add(birdButton[i]);
birdButton[i].addActionListener(this);
radioPanel.add(birdButton[i]);
i++;
}
radioPanel.setLayout(new BoxLayout(radioPanel, BoxLayout.Y_AXIS));
// birdButton.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
result = JOptionPane.showConfirmDialog(null, radioPanel, "Please choose", JOptionPane.OK_CANCEL_OPTION);
show();
}
/** Listens to the radio buttons. */
#Override
public void actionPerformed(ActionEvent e) {
JRadioButton rb = (JRadioButton) e.getSource();
System.err.println(rb.getText() + " is selected");
selectedButton = rb;
}
public void show() {
if (result == JOptionPane.OK_OPTION) {
System.err.println(selectedButton.getText() + " is selected and approved");
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
Vector<String> buttonNames = new Vector<String>();
buttonNames.add("Show");
buttonNames.add("Something");
buttonNames.add("Else");
buttonNames.add("Beep");
new RadioDemo(buttonNames);
}
});
}
}