Java实验第一天

这个星期的任务是做一个JAVA猜猜看游戏

目前正在研究阶段，还不是很有头绪，先把随机数以及java链接数据库弄懂先吧。

这天我没考虑太多的问题，就在老师给的源代码上加点盐加点醋，很粗糙的把图片显示成三张

首先，要运用到随机数，定义三个不同的随机数，分别把他们投射到Image上，再把Image投射到相应的显示图片的标签上

然后，还是看代码吧。。比较不会说，也不知道怎么解释，唉，其实我也看不懂的。多百度吧。

下面是随机显示三张图片的代码

import java.awt.EventQueue;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.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.util.Random;public class testtest extends JFrame {    /**     *      */    private static final long serialVersionUID = 1L;        private JPanel contentPane;    private JTextField tfDir;    private JTextField tfClass;    String strPath = "";        String strFileName = "";            File[] fileArray;       int NUM_IMG = 0;        int index   = 0;               /**     * Launch the application.     */    public static void main(String[] args) {        EventQueue.invokeLater(new Runnable() {            public void run() {                try {                    Guess01 frame = new Guess01();                    frame.setVisible(true);                } catch (Exception e) {                    e.printStackTrace();                }            }        });    }    /**     * Create the frame.     */    public Guess01() {        setTitle("                               猜猜看游戏FV0.1");        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);        final JButton btnDir = new JButton("\u9009\u62E9\u76EE\u5F55");        btnDir.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {             if(e.getSource()==btnDir){                         JFileChooser jfc=new JFileChooser();                     //jfc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES );                     jfc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);                     jfc.showDialog(new JLabel(), "选择");                     File file=jfc.getSelectedFile();                                          if(file.isDirectory()){                         System.out.println("文件夹:"+file.getAbsolutePath());                                              }else if(file.isFile()){                         System.out.println("文件:"+file.getAbsolutePath());                     }                     System.out.println(jfc.getSelectedFile().getName());                                          // 把文件路径显示在文本框中                     tfDir.setText(file.getAbsolutePath());                     //jlbImg.setIcon(new ImageIcon(file.getAbsolutePath()));                                          // 获取文件路径 与文件名                     strPath = file.getAbsolutePath();                     strFileName = jfc.getSelectedFile().getName();                                          if(file!=null && file.isDirectory());                         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("\u9009\u62E9\u73ED\u7EA7");        btnClass.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                            }        });        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("\u56FE\u72471");        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("\u56FE\u72472");        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("\u56FE\u72473");        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 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            String[] imgSrcs = {"D:/photo/1.jpg","D:/photo/2.jpg","D:/photo/3.jpg","D:/photo/4.jpg","D:/photo/5.jpg","D:/photo/6.jpg","D:/photo/7.jpg","D:/photo/8.jpg","D:/photo/9.jpg","D:/photo/10.jpg","D:/photo/11.jpg","D:/photo/12.jpg","D:/photo/13.jpg","D:/photo/14.jpg","D:/photo/15.jpg","D:/photo/16.jpg","D:/photo/17.jpg","D:/photo/18.jpg","D:/photo/19.jpg","D:/photo/20.jpg","D:/photo/21.jpg","D:/photo/22.jpg","D:/photo/23.jpg","D:/photo/24.jpg"};            <span style="font-family: Arial, Helvetica, sans-serif;">Random r = new Random();</span>

            String imageSrc = imgSrcs[r.nextInt(24)];            String imageSrc1 = imgSrcs[r.nextInt(24)];            String imageSrc2 = imgSrcs[r.nextInt(24)];            lblImg1.setIcon(new ImageIcon(imageSrc));            lblImg2.setIcon(new ImageIcon(imageSrc1));            lblImg3.setIcon(new ImageIcon(imageSrc2));                }                                   }        });        btnGuessAgain.setBounds(223, 337, 93, 23);        contentPane.add(btnGuessAgain);    }}

运行结果如图