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.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;
public class Guess2 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
    String strPath = "";    //+目录路径
	String strFileName = "";    //+文件名
	JLabel jlbImg = null;
    private int idImg = 1;
    JLabel jlbImg1 = null;
    JLabel jlbImg2 = null;
    JLabel jlbImg3 = null;
    /**
     * Launch the application.
     */

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Guess2 frame = new Guess2();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }
    /**
     * Create the frame.
     */
    public Guess2() {
        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 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()){
                     // 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, 363, 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();
                tfClass.setText(file.getAbsolutePath());
                
            }
        });
        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，显示带推測学生姓名
        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("\u56FE\u72471");
        
        lblImg1.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent arg0) {
            	
            } 
        });
        lblImg1.setBounds(26, 21, 183, 200);
        contentPane.add(lblImg1);
        jlbImg1 = new JLabel();
        jlbImg1.setBackground(Color.RED);
        jlbImg1.setBounds(26, 151, 181,201);
        this.add(jlbImg1);
        
        
        
        
        // 标签，显示第二个学生相片
        final JLabel lblImg2 = new JLabel("\u56FE\u72472");
        lblImg2.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
            	
                
            }
        });
        lblImg2.setForeground(Color.BLACK);
        lblImg2.setBackground(SystemColor.inactiveCaption);
        lblImg2.setBounds(241, 21, 200, 200);
        contentPane.add(lblImg2);
        jlbImg2 = new JLabel();
        jlbImg2.setBackground(Color.RED);
        jlbImg2.setBounds(240, 155, 183, 201);
        this.add(jlbImg2);
        // 标签。显示第三个学生相片
        final JLabel lblImg3 = new JLabel("\u56FE\u72473");
        lblImg3.addMouseListener(new MouseAdapter() {
        	
            @Override
            public void mouseClicked(MouseEvent e) {
            	 
                
            }
        });
        lblImg3.setBounds(434,21, 200, 200);
        contentPane.add(lblImg3);
        jlbImg3 = new JLabel();
        jlbImg3.setBackground(Color.RED);
        jlbImg3.setBounds(434, 155, 185, 201);
        this.add(jlbImg3);
        // 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
                    String strTmp = fileArray[index].toString();
                    index++;
                    if(index==NUM_IMG)
                        index = 0;
                    jlbImg1.setIcon(new ImageIcon(strTmp));
                    
                    index++;
                    jlbImg2.setIcon(new ImageIcon(strTmp));
                    index++;
                    if(e.getSource()==btnGuessAgain ){ //假设是nextbutton
                        String strTmp2 = fileArray[index].toString();
                        index++;
                       
                        jlbImg2.setIcon(new ImageIcon(strTmp2));
                        
                        index++;               
                    }
                   
                }   String strTmp1 = fileArray[index].toString();
                    index++;
                    jlbImg3.setIcon(new ImageIcon(strTmp1));   
            }
        });
        btnGuessAgain.setBounds(223, 337, 93, 23);
        contentPane.add(btnGuessAgain);
    }
}

结果

昨天第二个文本框都还没能都读取得了。如今能够了，

且能显示三张图片。

可是这样的进度都不知道能不能在星期五前完毕猜猜看。。。。