第四天，本来想进一步去改进《猜猜看》游戏的。可是非常多问题都不理解。也不熟悉怎么去弄到连接数据库。统计猜对次数，所以并没有进行再多的改动。

基本上就是这种执行结果了

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;  public class weiwei extends JFrame {  /**
*
*/  private static final long serialVersionUID = 1L;  private JPanel contentPane;  private JTextField tfDir;  private JTextField tfClass;  File[] fileArray; // 目录下全部文件  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 {  weiwei frame = new weiwei();  frame.setVisible(true);  } catch (Exception e) {  e.printStackTrace();  }  }  });  }  /** * Create the frame. */  public weiwei() {  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 button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()) {  // 參考： java中File.listFiles(FileFilter) FileFilter的使用  // http://zhouzaibao.iteye.com/blog/347557 ;  // 获取目录下全部的文件  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); // 选择班级 button的处理程序JButton btnClass = new JButton("\u9009\u62E9\u73ED\u7EA7");btnClass.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {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()) {  // 參考： java中File.listFiles(FileFilter) FileFilter的使用  // http://zhouzaibao.iteye.com/blog/347557 ;  // 获取目录下全部的文件  fileArray = file.listFiles();  NUM_IMG = fileArray.length; }}});btnClass.setBounds(26, 59, 93, 23);contentPane.add(btnClass);//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，显示带推測学生姓名  final JLabel lbGuessName = new JLabel("学生姓名");  lbGuessName.setBounds(259, 91, 140, 23);  contentPane.add(lbGuessName);  // 标签，显示第一个学生相片  final JLabel lblImg1 = new JLabel("NO.1");  lblImg1.addMouseListener(new MouseAdapter() {  @Override  public void mouseClicked(MouseEvent arg0) {  if (arg0.getSource() == lblImg1) {  if ((lblImg1.getText().equals(lbGuessName.getText()))) {  JOptionPane.showMessageDialog(null, "YES！

你猜对了。", "提示", JOptionPane.PLAIN_MESSAGE); } else { JOptionPane.showMessageDialog(null, "NO！你猜错了！", "错误", JOptionPane.ERROR_MESSAGE); } } } }); lblImg1.setBounds(26, 155, 150, 200); contentPane.add(lblImg1); // 标签，显示第二个学生相片 final JLabel lblImg2 = new JLabel("NO.2"); lblImg2.addMouseListener(new MouseAdapter() { @Override public void mouseClicked(MouseEvent arg1) { if (arg1.getSource() == lblImg2) { if ((lblImg2.getText().equals(lbGuessName.getText()))) { JOptionPane.showMessageDialog(null, "YES。你猜对了。", "提示", JOptionPane.PLAIN_MESSAGE); } else { JOptionPane.showMessageDialog(null, "NO！

你猜错了！

", "错误", JOptionPane.ERROR_MESSAGE); } } } }); lblImg2.setForeground(Color.BLACK); lblImg2.setBackground(SystemColor.inactiveCaption); lblImg2.setBounds(241, 155, 150, 200); contentPane.add(lblImg2); // 标签，显示第三个学生相片 final JLabel lblImg3 = new JLabel("NO.3"); lblImg3.addMouseListener(new MouseAdapter() { @Override public void mouseClicked(MouseEvent arg2) { if (arg2.getSource() == lblImg3) { if ((lblImg3.getText().equals(lbGuessName.getText()))) { JOptionPane.showMessageDialog(null, "YES！你猜对了。", "提示", JOptionPane.PLAIN_MESSAGE); } else { JOptionPane.showMessageDialog(null, "NO！你猜错了！

", "错误", JOptionPane.ERROR_MESSAGE); } } } }); lblImg3.setBounds(434, 155, 150, 200); contentPane.add(lblImg3); // 再猜一次 button，点击则更新对应的三张图片 与 带推測学生姓名 final JButton btnGuessAgain = new JButton("\u518D\u731C\u4E00\u6B21"); btnGuessAgain.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { if (e.getSource() == btnGuessAgain) { // 假设是nextbutton Random random = new Random(System.currentTimeMillis()); // 循环三次 ImageIcon icon; // int k[] = null; for (int i = 0; i < 3; i++) { index = random.nextInt(NUM_IMG); String strTmp = fileArray[index].toString(); String filename1 = fileArray[index].getName(); try { icon = new ImageIcon(ImageIO.read(new File(strTmp))); // 从图表中获取到图片 Image image = icon.getImage(); // 缩放图像 Image smallImage = image.getScaledInstance(150, 200, Image.SCALE_FAST); // 把Image文件转化为ImageIcon icon = new ImageIcon(smallImage); if (index == NUM_IMG) index = 0; switch (i) { case 0: System.out.println(fileArray[index].getName()); // k[0]=index; lblImg1.setIcon(icon); lblImg1.setText(filename1); break; case 1: System.out.println(fileArray[index].getName()); lblImg2.setIcon(icon); lblImg2.setText(filename1); // k[1]=index; break; case 2: System.out.println(fileArray[index].getName()); lblImg3.setIcon(icon); lblImg3.setText(filename1); // k[2]=index; break; } } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } } @SuppressWarnings("unused") Random random1 = new Random(index); // i = index; System.out.println(fileArray[index].getName()); String filename = fileArray[index].getName(); lbGuessName.setText(filename); } }); btnGuessAgain.setBounds(223, 400, 93, 23); contentPane.add(btnGuessAgain); } }

课程实训的过程是艰辛的，本来就不是非常熟悉JAVA代码编程，仅仅能靠网络上的知识还有老师发的提示代码进行改动还有修饰。完毕《猜猜看》游戏。

基本上已经完毕。尽管执行了起来。可是仅仅是非常主要的。没有统计次数。没有弄到连接数据库或者保存文件。