JAVA实验第二天

import java.awt.EventQueue;

import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.AbstractButton;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.swing.JLabel;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.SystemColor;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.util.Random;

@SuppressWarnings("unused")
public class jj 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 {
jj frame = new jj();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}

/**
* Create the frame.
*/
public jj() {
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);

// 文本框，显示目录
tfDir = new JTextField();
tfDir.setEditable(false);
tfDir.setBounds(125, 27, 450, 21);
contentPane.add(tfDir);
tfDir.setColumns(10);

//设置提醒文字
JLabel j1 = new JLabel("猜猜我是谁，请点我相片");
j1.setBounds(5, 100, 200, 33);
this.add(j1);

// 标签，显示带猜测学生姓名
final JLabel lbGuessName = new JLabel("学生姓名");
lbGuessName.setBounds(259, 91, 140, 23);
contentPane.add(lbGuessName);