《Java课程实习》日志（周四）猜猜看注释版

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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; 
import java.util.Random; //+
import javax.swing.JOptionPane; //+
public class Guess3 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;
	String strPath = "";    //+文件夹路径
	String strFileName = "";    //+文件名称
	JLabel jlbImg = null;
	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 {
					Guess3 frame = new Guess3();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}
	/**
	 * Create the frame.
	 */
	public Guess3() {
		setTitle("猜猜看TYHban");//左上角标题
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//关闭界面，如果不写这句，界面是没了，但程序还驻留在内存中没有结束
		setBounds(100, 100, 645, 510);//setBounds(x,y,width,height); x:组件在容器X轴上的起点 y:组件在容器Y轴上的起点 width:组件的长度 height:组件的高度
		contentPane = new JPanel();//面板
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));//设置面板的边界，Border描述了面板四周的边界（属于面板内部），EmptyBorder是一个空白的边界；
		//语句的意思是让contentPane内部边框为空，并且有5个像素的厚度，如果直接在contentPane上面添加一个按钮（设置为充满），那么按钮将铺满除了边框之外的内部矩形
		
		setContentPane(contentPane);
		contentPane.setLayout(null);//界面排版

		// 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"); //目录选择 
				File file=jfc.getSelectedFile(); 
				tfDir.setText(file.getAbsolutePath());
				if(file!=null && file.isDirectory()){					
					// 获取文件夹下所有的文件，显示该文件夹的所有文件
					fileArray = file.listFiles();
					NUM_IMG = fileArray.length;

				}
			}
		});
		btnDir.setBounds(26, 26, 93, 23);//选择目录一，setBounds(x,y,width,height)
		contentPane.add(btnDir);//选择目录1

		// 文本框，显示目录
		tfDir = new JTextField();//建一个文本框，文本框能输入的字符为无穷大
		tfDir.setEditable(false);//设置不可编辑
		tfDir.setBounds(125, 27, 450, 21);//setBounds(x,y,width,height)
		contentPane.add(tfDir);//文本框
		//tfDir.setColumns(10);

		// 选择班级 按钮的处理程序
		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);//选择目录二

		// 文本框，显示班级文件
		tfClass = new JTextField();
		tfClass.setEditable(false);
		tfClass.setBounds(125, 60, 450, 21);
		contentPane.add(tfClass);//文本框
		tfClass.setColumns(10);

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

		// 标签，显示第一个学生相片
		final JLabel lblImg1 = new JLabel("图片一");
		lblImg1.addMouseListener(new MouseAdapter () {
			@Override
			public void mouseClicked(MouseEvent arg0) {
				if(arg0.getSource()==lblImg1){//+
					if(( lblImg1.getText().equals(lbGuessName.getText()))){
						JOptionPane.showMessageDialog(null,"哇，你猜对了","提示",JOptionPane.PLAIN_MESSAGE);

					}
					else {
						JOptionPane.showMessageDialog(null,"no，猜错了","错误",JOptionPane.ERROR_MESSAGE);

					}  

				}
			} 
		});
		lblImg1.setBounds(26,155, 150, 200);
		contentPane.add(lblImg1);//图片一显示
		jlbImg1 = new JLabel();
		jlbImg1.setBackground(Color.RED);
		jlbImg1.setBounds(26, 151, 181,201);//JLabel在javax.swing  	Label在java.awt	
		this.add(jlbImg1);


		// 标签，显示第二个学生相片
		final JLabel lblImg2 = new JLabel("图片二");
		lblImg2.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent arg1) {
				if(arg1.getSource()==lblImg2){//+
					if(( lblImg2.getText().equals(lbGuessName.getText()))){
						JOptionPane.showMessageDialog(null,"哇，你猜对了","提示",JOptionPane.PLAIN_MESSAGE);

					}
					else {
						JOptionPane.showMessageDialog(null,"no，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);//图片二显示
		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("图片三");
		lblImg3.addMouseListener(new MouseAdapter() {

			@Override
			public void mouseClicked(MouseEvent arg2) {
				if(arg2.getSource()==lblImg3){//+
					if(( lblImg3.getText().equals(lbGuessName.getText()))){
						JOptionPane.showMessageDialog(null,"哇，你猜对了","提示",JOptionPane.PLAIN_MESSAGE);
					}
					else {
						JOptionPane.showMessageDialog(null,"no，猜错了","错误",JOptionPane.ERROR_MESSAGE);
					}  
				}
			}
		});
		lblImg3.setBounds(434,155, 150, 200);
		contentPane.add(lblImg3);
		jlbImg3 = new JLabel();
		jlbImg3.setBackground(Color.RED);
		jlbImg3.setBounds(434, 155, 185, 201);
		this.add(jlbImg3);

		// 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 btnGuessAgain = new JButton("\u518D\u731C\u4E00\u6B21");
		btnGuessAgain.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				if(e.getSource()==btnGuessAgain ){ //如果是next按钮
					Random random = new Random(System.currentTimeMillis());//随机数
					ImageIcon icon;
					for(int i=0;i<3;i++)
					{
						index = random.nextInt(NUM_IMG);//随机数调用
						String strTmp = fileArray[index].toString();//图片数组
						String filename1=fileArray[index].getName();//名字数组
						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());
								lblImg1.setIcon(icon);
								lblImg1.setText(filename1);
								break;
							case 1:
								System.out.println(fileArray[index].getName());  
								lblImg2.setIcon(icon);
								lblImg2.setText(filename1);
								break;
							case 2:
								System.out.println(fileArray[index].getName());  
								lblImg3.setIcon(icon);
								lblImg3.setText(filename1);
								break;
							}
						} catch (IOException e1) {
							e1.printStackTrace();
						}
					}
				}
				@SuppressWarnings("unused")
				Random random1 = new Random(index);
				System.out.println(fileArray[index].getName());//输出图片的名字

			}
		});//==+
		btnGuessAgain.setBounds(223, 400, 93, 23);//setBounds(x,y,width,height)
		contentPane.add(btnGuessAgain);//next
	}
} 

《Java课程实习》日志（周四）猜猜看注释版

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原文地址：http://blog.csdn.net/u013910357/article/details/46737995