を更新しようとしていJListます。を使用するように定義しましたlistModel。その点で、私のmain()方法では要素を に追加できlistModel、それらが に反映されるため、正常に機能しJListます。ただし、関数を呼び出して新しい情報で強制的に更新しようとしています (以下)。このコードはまったく機能しません。どんな助けでも大歓迎です。
public void updateList(List<String> gamelist) {
listModel.removeAllElements();
for (int i=0;i<gamelist.size();i++) {
System.out.println(gamelist.get(i).toString());
listModel.addElement(gamelist.get(i).toString());
}
listGames.setModel(listModel);
}
public class Main extends javax.swing.JFrame {
/**
* Creates new form Main
*/
private javax.swing.JEditorPane editorWeb = new JEditorPane();
private DefaultListModel listModel = new DefaultListModel();
public Main() {
initComponents();
scrollWeb.setViewportView( editorWeb );
editorWeb.setEditable(false);
editorWeb.setSize(scrollWeb.getWidth(), scrollWeb.getHeight());
try {
editorWeb.setPage("http://www.futureretrogaming.tk/news.html");
} catch (IOException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
}
listModel.addElement("test");
}
問題は、他のフォームから値を返すために新しいメインを作成していることだと思います。
public class LoginWindow extends javax.swing.JFrame {
/**
* Creates new form LoginWindow
*/
List<String> games = new ArrayList<String>();
Main program = new Main();
public LoginWindow() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
textUsername = new javax.swing.JTextField();
textPassword = new javax.swing.JPasswordField();
buttonLogin = new javax.swing.JButton();
jLabel1.setText("Please provide your username and password:");
jLabel1.setToolTipText("");
jLabel2.setText("Username:");
jLabel3.setText("Password:");
buttonLogin.setText("Submit");
buttonLogin.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
buttonLoginActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jLabel1)
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel2)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(textUsername))
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel3)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(textPassword, javax.swing.GroupLayout.PREFERRED_SIZE, 159, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addComponent(buttonLogin))
.addContainerGap(84, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel1)
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(textUsername, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(34, 34, 34)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel3)
.addComponent(textPassword, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 18, Short.MAX_VALUE)
.addComponent(buttonLogin)
.addContainerGap())
);
pack();
}// </editor-fold>
private void buttonLoginActionPerformed(java.awt.event.ActionEvent evt) {
try {
// TODO add your handling code here:
String loginurl = "http://futureretrogaming.tk/scripts/checklogin.php?username="+textUsername.getText()+"&password="+textPassword.getText();
System.out.println(loginurl);
URL checklogin = new URL(loginurl);
URLConnection yc = checklogin.openConnection();
BufferedReader in = new BufferedReader(new InputStreamReader(yc.getInputStream()));
URL file2 = new URL(loginurl);
Scanner sc2 = new Scanner(file2.openStream());
String inputLine = "";
int i = 0;
while (/*(inputLine = in.readLine()) != null*/sc2.hasNext()) {
inputLine = inputLine.trim();
String input = sc2.next();
input = input.trim();
if (inputLine.equalsIgnoreCase("false") || input.equalsIgnoreCase("false")) {
JOptionPane.showMessageDialog(this,"Username or Password is incorrect. Please try again.", "Error", JOptionPane.PLAIN_MESSAGE);
break;
}
else if (inputLine.equalsIgnoreCase("empty") || input.equalsIgnoreCase("empty")) {
JOptionPane.showMessageDialog(this,"You must type in a username and a password.", "Error",JOptionPane.PLAIN_MESSAGE);
break;
}
else {
System.out.println(input);
if (games == null)
System.out.print("games is null");
games.add(input);
}
}
in.close();
if (games!=null) {
games.remove(0);
Collections.sort(games);
program.updateList(games);
}
} catch (MalformedURLException ex) {
Logger.getLogger(LoginWindow.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(LoginWindow.class.getName()).log(Level.SEVERE, null, ex);
}
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(LoginWindow.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(LoginWindow.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(LoginWindow.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(LoginWindow.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new LoginWindow().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton buttonLogin;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JPasswordField textPassword;
private javax.swing.JTextField textUsername;
// End of variables declaration
}