學(xué)生作品_文件對(duì)話框說明

1、一、作品要求編寫文件框小程序。二、學(xué)生作品分析1、代碼分析代碼分析如下：public class FileChooserDemo extends JPanelimplement sic private final String newline = n; JButton openButton, saveButton; JTextArea log;JFileChooser fc;public FileChooserDemo() super(new BorderLayout(); log = new JTextArea(15,40);ionListener log.setMargin(new Ins

2、ets(10,10,10,10); log.setEditable(false);JScrollPane logScrollPane = new JScrollPane(log);/創(chuàng)建一個(gè)文件過濾，使用當(dāng)前目錄 fc = new JFileChooser(.);/過濾條件在 MyFilter 類中定義 fc.addChoosableFileFilter(new MyFilter(); openButton = new JButton(打開文件,createImageIcon(images/Open16.gif); openButton.addActionListener(this);save

3、Button = new JButton(保存文件,createImageIcon(images/Save16.gif); saveButton.addActionListener(this);/構(gòu)建一個(gè)面板，添加“打開文件”和“保存文件” JPanel buttonPanel = new JPanel(); buttonPanel.add(openButton); buttonPanel.add(saveButton);add(buttonPanel, BorderLayout.PAGE_START);add(logScrollPane, BorderLayoENTER);/*方法說明：事件

4、處理*輸入?yún)?shù)：*返回類型：*/public void actionPerformed(ActionEvent e) /當(dāng)點(diǎn)擊“打開文件”按鈕if (e.getSource() = openButton) returnVal = fc.showOpenDialog(FileChooserDemo.this); if (returnVal = JFileChooser.APPROVE_OPTION) File file = fc.getSelectedFile();/在這里添加一些對(duì)文件的處理log.append(打開文件: + file.getName() + newline); else l

5、og.append(打開文件被用戶取消！ + newline);/點(diǎn)擊“保存文件”按鈕 else if (e.getSource() = saveButton) returnVal = fc.showSaveDialog(FileChooserDemo.this); if (returnVal = JFileChooser.APPROVE_OPTION) File file = fc.getSelectedFile();/在這里添加一些對(duì)文件的處理log.append(保存文件: + file.getName()+ newline); else log.append(保存文件被用戶取消！ +

6、newline);/*方法說明：獲取圖像對(duì)象*輸入?yún)?shù)：String path*返回類型：ImageIcon*/路徑對(duì)象protected sic ImageIcon createImageIcon(String path) .URL imgURL = FileChooserDemo.class.getResource(path); if (imgURL != null) return new ImageIcon(imgURL); else System.err.prln(Couldnt find file: + path); return null;public sic void main(

7、String args) JFrame.setDefaultLookAndFeelDecorated(true); JDialog.setDefaultLookAndFeelDecorated(true);/創(chuàng)建窗體JFrame frame = new JFrame(FileChooserDemo); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);/創(chuàng)建一個(gè)面板JComponent newContentPane = new FileChooserDemo();newContentPatOpaque(true);frame.setContentPane(newContentPane);/顯示窗體frame.pack(); frame.setVisible(true);三、作品操作說明界面四、作品參與學(xué)生信息班級(jí)學(xué)