?? webhunter.java
字號:
import java.io.*;import java.net.*;import java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.border.*;public class WebHunter extends JFrame implements ActionListener { private Box centerPane; private JTextField sourceFile; public WebHunter() { super("WebHunter"); build(); pack(); setResizable(false); setLocationRelativeTo(null); setDefaultCloseOperation(EXIT_ON_CLOSE); setVisible(true); } public void actionPerformed(ActionEvent evt) { URL source; try { source = new URL(sourceFile.getText()); } catch (MalformedURLException me) { JOptionPane.showMessageDialog(this, "Invalid URL.", "Download error", JOptionPane.ERROR_MESSAGE); return; } JFileChooser chooser = new JFileChooser(); chooser.setSelectedFile(new File(new File(source.getFile()).getName())); chooser.showSaveDialog(this); File target = chooser.getSelectedFile(); JProgressBar bar; JPanel panel = new JPanel(new GridLayout(3, 2)); panel.add(new JLabel("Source: ")); panel.add(new JLabel(sourceFile.getText())); panel.add(new JLabel("Target: ")); panel.add(new JLabel(target.getAbsolutePath())); panel.add(new JLabel("Progress: ")); panel.add(bar = new JProgressBar()); panel.setBorder(new EmptyBorder(0, 3, 0, 3)); bar.setStringPainted(true); centerPane.add(Box.createVerticalStrut(3)); centerPane.add(new JSeparator()); centerPane.add(Box.createVerticalStrut(3)); centerPane.add(panel); centerPane.add(Box.createVerticalStrut(3)); pack(); } private void build() { getContentPane().setLayout(new BorderLayout()); getContentPane().add(BorderLayout.NORTH, buildDownloadPane()); getContentPane().add(BorderLayout.CENTER, centerPane = Box.createVerticalBox()); } private Container buildDownloadPane() { JPanel panel = new JPanel(); JButton button; panel.add(new JLabel("File to download: ")); panel.add(sourceFile = new JTextField(15)); panel.add(button = new JButton("Download...")); sourceFile.setText("http://jext.free.fr/macos7.jpg"); button.addActionListener(this); return panel; } public static void main(String[] args) { new WebHunter(); }}
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -