Contoh java mendapatkan ikon sistem dan ikon file berdasarkan ekstensi

复制代码代码如下:

impor java.io.File;

impor java.io.IOException;

impor java.awt.BorderLayout;

impor java.awt.event.ActionEvent;

impor java.awt.event.ActionListener;

impor javax.swing.Icon;

impor javax.swing.ImageIcon;

impor javax.swing.JButton;

impor javax.swing.JFrame;

impor javax.swing.JPanel;

impor javax.swing.JTextField;

impor javax.swing.JLabel;

impor javax.swing.BoxLayout;

impor javax.swing.filechooser.FileSystemView;

impor sun.awt.shell.ShellFolder;

FileIconExtractor kelas publik memperluas implementasi JFrame ActionListener{

pribadi JButton getIconBtn = new JButton("dapatkan Ikon");

pribadi JPanel iconPanel = JPanel baru();

pribadi JTextField extField = JTextField baru();

private JLabel smallIconLabel = new JLabel("Ikon kecil di sini");

private JLabel bigIconLabel = new JLabel("Ikon besar di sini");

FileIconExtractor publik() {

ini.setUkuran(200, 150);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

ini.setLayout(BorderLayout baru());

getIconBtn.setActionCommand("GETICON");

getIconBtn.addActionListener(ini);

iconPanel.setLayout(BoxLayout baru(iconPanel, BoxLayout.Y_AXIS));

iconPanel.tambahkan(smallIconLabel);

iconPanel.add(bigIconLabel);

this.add(extField, BorderLayout.UTARA);

this.add(iconPanel, BorderLayout.CENTER);

this.add(getIconBtn, BorderLayout.SOUTH);

this.setVisible(benar);

}

public void actionPerformed(ActionEvent e) {

if (e.getActionCommand().equals("GETICON")) {

String ext = extField.getText();

berkas berkas;

mencoba

{

file = File.createTempFile("icon", "." + ext);

Tampilan FileSystemView = FileSystemView.getFileSystemView();

Ikon smallIcon = view.getSystemIcon(file);

ShellFolder shellFolder = ShellFolder.getShellFolder(file);

Ikon bigIcon = ImageIcon baru(shellFolder.getIcon(true));

setIconLabel(Ikon kecil,Ikon besar);

file.hapus();

}

menangkap (IOException ioe)

{

ioe.printStackTrace();

}

}

}

private void setIconLabel(Ikon kecilIkon, Ikon besarIkon) {

smallIconLabel.setIcon(smallIcon);

bigIconLabel.setIcon(bigIcon);

}

public static void main(String[] args) {

FileIconExtractor fie = FileIconExtractor baru();

}

}