Test Event Response Modify interface content

 PackageCom.swing.demo;Importjava.awt.BorderLayout;ImportJava.awt.Color;ImportJava.awt.Container;Importjava.awt.event.ActionEvent;ImportJava.awt.event.ActionListener;ImportJavax.swing.JButton;ImportJavax.swing.JFrame;ImportJavax.swing.JTextArea;/*** Test Event Response Modification interface content *@authorAdministrator **/ Public classActionlistenertest { Public Static voidMain (string[] args) {Actionlistenertest instance=Newactionlistenertest ();    Instance.show (); }    Private voidShow () {JFrame frame=NewJFrame ("form"); Container ContentPane=Frame.getcontentpane (); JButton btn=NewJButton ("button"); JTextArea TextArea=NewJTextArea ();        Textarea.setbackground (Color.White); Textarea.setrows (10); Myactionlistener Listener=NewMyactionlistener ();        LISTENER.SETBTN (BTN);        Listener.settextarea (TextArea);        Btn.addactionlistener (listener);        Contentpane.add (BTN, Borderlayout.north);        Contentpane.add (TextArea, Borderlayout.south);        Frame.pack (); Frame.setvisible (true);        Frame.requestfocus (); Frame.setsize (400, 300); Frame.setlocationrelativeto (NULL);    Frame.setdefaultcloseoperation (Jframe.exit_on_close); }    Private classMyactionlistenerImplementsActionListener {PrivateJButton btn; PrivateJTextArea TextArea;  Public voidsetbtn (JButton btn) { This. btn =btn; }         Public voidSettextarea (JTextArea textArea) { This. TextArea =TextArea; } @Override Public voidactionperformed (ActionEvent e) {Btn.settext ("Hello World"); Textarea.settext (Textarea.gettext ()+ "new000" + "\ r \ n"); }    }}

Test Event Response Modify interface content