fr.add(pnl); private Frame fr; In this program, a button with a label will be exhibited, unlike the above program. *; public class MyClass implements ActionListener{ JButton btn1 = new JButton("test"); btn1.addActionListener(this); JButton btn2 = new JButton("test"); btn2.addActionListener(this); public void actionPerformed(ActionEvent }
fr.setSize(300,300); Public interface ActionListener extends EventListener. ※※ 覚えるというより、こういうのはコピペするとか、Eclipseに補完させれば良いのです。, メールアドレスは公開されませんのでご安心ください。また、* が付いている欄は必須項目となりますので、必ずご記入をお願いします。, 次回のコメントで使用するためブラウザーに自分の名前、メールアドレス、サイトを保存する。, このサイトでは最適な広告を表示するためにCookieを用いてアクセス情報を記録しています。ブラウザの設定で Cookieをオフにすれば止められます。. Ajouter une question.
implements this interface, and the object created with that //create panel lbl2.setText("Now, the button is clicked"); Java ActionListener is a class that gets notified when the user clicks a menu item or button. import java.awt.event.WindowEvent; ã§ã³ã»ãªã³ã¯ãã¹ããã, BasicFileChooserUI.ApproveSelectionAction, BasicFileChooserUI.ChangeToParentDirectoryAction, BasicInternalFrameTitlePane.IconifyAction, BasicInternalFrameTitlePane.MaximizeAction, BasicInternalFrameTitlePane.RestoreAction, BasicSplitPaneUI.KeyboardDownRightHandler, BasicSplitPaneUI.KeyboardResizeToggleHandler, MetalFileChooserUI.DirectoryComboBoxAction. Button btnn = new Button("Click this");
}); //create a scrollpane
//set the alignment //create the object of class It is notified against ActionEvent. private Panel pnl; （書き方の違いだけで、動作は同じです。）, 最初のbtn1が、ActionListenerを含むクラスを明示的に作る書き方です。 The listener interface for receiving action events. }}}. import java.awt.event.ActionEvent; Below are the examples to implement java ActionListener: import java.awt.BorderLayout; Je risque sûrement de revenir pour d'autres questions … //add pane to the panel */, // Étape 6 : on implémente la méthode keyReleased définie dans l'interface KeyListener. //set the alignment
ALL RIGHTS RESERVED. je pense qu il te manque d'importe la Bibliothèque: import java.awt.event.ActionListener; Réponse 3 / 3.
class CustomActionListener implements ActionListener{
//set the size of frame
txt.setLineWrap(true);
jusqu'à 300 000 de dommages et intérêts. fr.setSize(300,300); private void ActnListener(){ Dans le contexte d'une interface graphique (Swing, AWT, etc. //create a text area ).Cette interface déclare une seule méthode : itemStateChanged(ItemEvent e) qui indique que l'élément a changé d'état.La classe ItemEvent étend java.util.EventObject et dispose donc des méthodes déclarées dans cette classe (notamment getSource() ), mais fournit également quatre autres méthodes spécifiques aux événements relatifs aux fenêtres, notamment getItem() qui retourne l'élément affecté par l'événement, getStateChange() retourne le nouvel état de l'élément (sélectionné ou désélectionné), et getItemSelectable() qui retourne le composant originaire de l'événement.Afin d'ajouter un ItemListener sur les composants qui le permettent (les boutons, JcomboxBox, les listes, etc), vous disposez de la méthode addItemListener(ItemListener).Voici un exemple d'implémentation d'un ItemListener : Les sources présentées sur cette page sont libres de droits et vous pouvez les utiliser à votre convenance. //method definition Choisissez la catégorie, puis la rubrique : Nombre d'auteurs : 37, nombre de questions : 155, dernière mise à jour : 10 octobre 2015
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