Guess3
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package guess3;import java.awt.EventQueue; import javax.imageio.ImageIO; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.border.EmptyBorder; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JFileChooser; import javax.swing.JTextField; import javax.swing.JLabel; import java.awt.Color; 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; public class guess3 extends JFrame { /** * */class myFileFilter implements FileFilter{@Override public boolean accept(File pathname) { String filename = pathname.getName().toLowerCase(); if(filename.contains(".jpg")){ return false; }else{ return true; } } } 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 JLabel jlbImg = null; JButton btnNext = null; public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { guess3 frame = new guess3(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } public guess3() { setTitle("\u731C\u731C\u770B\u6E38\u620FV0.1"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(100, 100, 645, 409); 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("目录"); btnDir.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { JFileChooser j=new JFileChooser(); j.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES); j.showDialog(new JLabel(), "选择目录"); File file=j.getSelectedFile(); tfDir.setText(file.getAbsolutePath()); if((file!=null && file.isDirectory())){ // 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, 363, 21); contentPane.add(tfDir); tfDir.setColumns(10); // 选择班级 按钮的处理程序 JButton btnClass = new JButton("班级"); btnClass.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { JFileChooser i=new JFileChooser(); i.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES); i.showDialog(new JLabel(), "选择班级"); File file=i.getSelectedFile(); tfClass.setText(file.getAbsolutePath()); fileArray = file.listFiles(); NUM_IMG = fileArray.length; } }); btnClass.setBounds(26, 59, 93, 23); contentPane.add(btnClass); // 文本框，显示班级文件 tfClass = new JTextField(); tfClass.setEditable(false); tfClass.setBounds(125, 60, 363, 21); contentPane.add(tfClass); tfClass.setColumns(10); // 标签，显示带猜测学生姓名 JLabel lbGuessName = new JLabel("\u59D3\u540D"); lbGuessName.setBounds(259, 91, 102, 23); contentPane.add(lbGuessName); // 标签，显示第一个学生相片 final JLabel lblImg1 = new JLabel(""); setBackground(Color.RED); lblImg1.setBounds(100, 100, 200, 200); this.add(lblImg1); lblImg1.addMouseListener(new MouseAdapter() { @Override public void mouseClicked(MouseEvent arg0) { } }); lblImg1.setBounds(26, 151, 183, 178); contentPane.add(lblImg1); // 标签，显示第二个学生相片 final JLabel lblImg2 = new JLabel(""); lblImg2.setBackground(Color.RED); lblImg2.setBounds(100, 100, 200, 200); this.add(lblImg2); lblImg2.addMouseListener(new MouseAdapter() { @Override public void mouseClicked(MouseEvent e) { } }); lblImg2.setForeground(Color.BLACK); lblImg2.setBackground(SystemColor.inactiveCaption); lblImg2.setBounds(241, 155, 183, 172); contentPane.add(lblImg2); // 标签，显示第三个学生相片 final JLabel lblImg3 = new JLabel(""); lblImg3.setBackground(Color.RED); lblImg3.setBounds(100, 100, 200, 200); this.add(lblImg3); lblImg3.addMouseListener(new MouseAdapter() { @Override public void mouseClicked(MouseEvent e) { } }); lblImg3.setBounds(434, 155, 185, 172); contentPane.add(lblImg3); // 再猜一次 按钮，点击则更新相应的三张图片 与 带猜测学生姓名 final JButton btnNext = new JButton("再猜一次"); btnNext.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { if(e.getSource()==btnNext){ //如果是next按钮 //随机数 Random random = new Random(System.currentTimeMillis()); //循环三次 ImageIcon icon;//定义icon变量 for(int i=0;i<3;i++) { index = random.nextInt(NUM_IMG); String strTmp = fileArray[index].toString(); try { icon = new ImageIcon(ImageIO.read(new File(strTmp))); Image image = icon.getImage(); // 从图表中获取到图片 Image smallImage = image.getScaledInstance(150,200,Image.SCALE_FAST);// 缩放图像 icon = new ImageIcon(smallImage);//把Image文件转化为ImageIcon if(index==NUM_IMG) index = 0; switch(i) { case 0: lblImg1.setIcon(icon); break; case 1: lblImg2.setIcon(icon); break; case 2: lblImg3.setIcon(icon); break; } } catch (IOException e1) { e1.printStackTrace(); } } } } }); btnNext.setBounds(223, 337, 93, 23); contentPane.add(btnNext); } } 0 0
