《JAVA程序设计》实训第二天——《猜猜看》游戏

public class laichangqing extends JFrame {
/**
*
*/
private static final long serialVersionUID = 1L;

private JPanel contentPane;
private JTextField tfDir;
private JTextField tfClass;
File[] fileArray; // 文件夹下所有文件
int NUM_IMG = 0; // 文件总数目
int index = 0; // 当前文件的序号
int i = 0;

JLabel jlbImg1 = null;
JLabel jlbImg2 = null;
JLabel jlbImg3 = null;

private Graphics g;

/**
* Launch the application.
*/
class myFileFilter implements FileFilter {

@Override
public boolean accept(File pathname) {
String filename = pathname.getName().toLowerCase();
if (filename.contains(".jpg")) {
return false;
} else {
return true;
}
}
}

public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
laichangqing frame = new laichangqing();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}

/**
* Create the frame.
*/
public laichangqing() {
setTitle("\u731C\u731C\u770B\u6E38\u620FV0.1");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 645, 500);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);

// 选择目录 按钮的处理程序
JButton btnDir = new JButton("\u9009\u62E9\u76EE\u5F55");
btnDir.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
JFileChooser jfc = new JFileChooser();
jfc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
jfc.showDialog(new JLabel(), "选择");
File file = jfc.getSelectedFile();
tfDir.setText(file.getAbsolutePath());
if (file != null && file.isDirectory()) {
// 参考： java中File.listFiles(FileFilter) FileFilter的使用
// http://zhouzaibao.iteye.com/blog/347557 ;

// 获取文件夹下所有的文件
fileArray = file.listFiles();
NUM_IMG = fileArray.length;

}
}
});
btnDir.setBounds(26, 26, 93, 23);
contentPane.add(btnDir);