ボタンをクリックして新しい JFrame を開きたい (btnAdd); アクションリスナーを作成しようとしましたが、うまくいきません。コードは実行されますが、ボタンをクリックしても何も起こりません。問題のメソッドは、次のコードの最後の 2 つです。どんな助けでも大歓迎です!
package AdvancedWeatherApp;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
import javax.swing.event.ListSelectionListener;
import weatherforecast.FetchWeatherForecast;
public class MainFrame extends JFrame implements ListSelectionListener {
private boolean initialized = false;
private Actions actions = new Actions();
private javax.swing.JScrollPane jspFavouritesList = new javax.swing.JScrollPane();
private javax.swing.DefaultListModel<String> listModel = new javax.swing.DefaultListModel<String>();
private javax.swing.JList<String> favouritesList = new javax.swing.JList<String>(
listModel);
private javax.swing.JLabel lblAcknowledgement = new javax.swing.JLabel();
private javax.swing.JLabel lblTitle = new javax.swing.JLabel();
private javax.swing.JButton btnAdd = new javax.swing.JButton();
private javax.swing.JButton btnRemove = new javax.swing.JButton();
public void initialize() {
initializeGui();
initializeEvents();
this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
}
/**
*
*/
private void initializeGui() {
if (initialized)
return;
initialized = true;
this.setSize(500, 400);
Dimension windowSize = this.getSize();
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
this.setLocation(screenSize.width / 2 - windowSize.width / 2,
screenSize.height / 2 - windowSize.height / 2);
Container pane = this.getContentPane();
pane.setLayout(new BorderLayout());
setLayout(new BorderLayout());
setTitle("Favourite Weather Locations");
JPanel jpSouth = new JPanel();
jpSouth.setLayout(new FlowLayout());
JPanel jpNorth = new JPanel();
jpNorth.setLayout(new FlowLayout());
JPanel jpCenter = new JPanel();
jpCenter.setLayout(new BoxLayout(jpCenter, BoxLayout.PAGE_AXIS));
JPanel jpEast = new JPanel();
JPanel jpWest = new JPanel();
getContentPane().setBackground(Color.WHITE);
jpEast.setBackground(Color.WHITE);
jpWest.setBackground(Color.WHITE);
jpCenter.setBackground(Color.WHITE);
getContentPane().add(jspFavouritesList);
jpCenter.add(jspFavouritesList);
jspFavouritesList.setViewportView(favouritesList);
favouritesList
.setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
favouritesList.addListSelectionListener(this);
jpCenter.add(btnAdd);
jpCenter.add(btnRemove);
jpCenter.setAlignmentY(CENTER_ALIGNMENT);
btnAdd.setText("Add Location");
btnAdd.setAlignmentX(Component.CENTER_ALIGNMENT);
btnAdd.setFont(new Font("Calibri", Font.PLAIN, 18));
jpCenter.add(btnRemove);
btnRemove.setText("Remove Location");
btnRemove.setAlignmentX(Component.CENTER_ALIGNMENT);
btnRemove.setFont(new Font("Calibri", Font.PLAIN, 18));
getContentPane().add(jpEast, BorderLayout.EAST);
getContentPane().add(jpWest, BorderLayout.WEST);
getContentPane().add(jpSouth);
jpSouth.add(lblAcknowledgement);
add(lblAcknowledgement, BorderLayout.SOUTH);
lblAcknowledgement.setText(FetchWeatherForecast.getAcknowledgement());
lblAcknowledgement.setHorizontalAlignment(SwingConstants.CENTER);
lblAcknowledgement.setFont(new Font("Tahoma", Font.ITALIC, 12));
getContentPane().add(jpNorth);
jpNorth.add(lblTitle);
add(lblTitle, BorderLayout.NORTH);
lblTitle.setText("Your Favourite Locations");
lblTitle.setHorizontalAlignment(SwingConstants.CENTER);
lblTitle.setFont(new Font("Calibri", Font.PLAIN, 32));
lblTitle.setForeground(Color.DARK_GRAY);
getContentPane().add(jpCenter);
}
private void initializeEvents() {
// TODO: Add action listeners, etc
}
public class Actions implements ActionListener {
public void actionPerformed(ActionEvent e) {
String command = e.getActionCommand();
command = command == null ? "" : command;
// TODO: add if...if else... for action commands
}
}
public void dispose() {
// TODO: Save settings
// super.dispose();
System.exit(0);
}
public void setVisible(boolean b) {
initialize();
super.setVisible(b);
}
public static void main(String[] args) {
new MainFrame().setVisible(true);
}
public void actionPerformed(ActionEvent evt){
if (evt.getSource() == btnAdd) {
showNewFrame();
//OPEN THE SEARCH WINDOW
}
}
private void showNewFrame() {
JFrame frame = new JFrame("Search Window" );
frame.setSize( 500,120 );
frame.setLocationRelativeTo( null );
frame.setVisible( true );
}
}