本文介绍了一个名为“猜猜看”的简单游戏实现过程。该游戏通过Java Swing框架随机展示三张学生照片，并从中随机选择一张作为猜测目标。文章详细介绍了如何使用随机数生成器选取图片、读取图片以及调整图片大小等关键技术。
package xuexi;
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.JOptionPane;
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;
@SuppressWarnings("unused")
public class Guess01 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 1
int NUM_IMG = 0; // 文件总数目
int index = 0; // 当前文件的序号
private int idImg = 1;
JLabel jlbImg1 = null;
JLabel jlbImg2 = null;
JLabel jlbImg3 = null;
JLabel jlbImg4 = null;
JLabel jlbImg5 = null;
JLabel jlbImg6 = null;
/**
* 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;
}
}
}
//2
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("\u731C\u731C\u770B\u6E38\u620FV0.1");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 700, 530);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 6, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
// 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) {
//3
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()){
//4
// 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("\u9009\u62E9\u73ED\u7EA7");
btnClass.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
//5
JFileChooser jfc=new JFileChooser();
jfc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES );
jfc.showDialog(new JLabel(), "选择");
File file=jfc.getSelectedFile();
tfClass.setText(file.getAbsolutePath());
//6
}
});
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
final JLabel lbGuessName = new JLabel("\u59D3\u540D");
lbGuessName.setBounds(259, 91, 142, 23);
contentPane.add(lbGuessName);
// 标签，显示第一个学生相片
final JLabel lblImg1 = new JLabel(" ");
lblImg1.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
if(arg0.getSource()==lblImg1){
if(( lblImg1.getText().equals(lbGuessName.getText()))){
JOptionPane.showMessageDialog(null,"恭喜你猜对了","提示",JOptionPane.PLAIN_MESSAGE);
}
else {
JOptionPane.showMessageDialog(null,"你猜错了！","错误",JOptionPane.ERROR_MESSAGE);
}
}
}
});
lblImg1.setBounds(26,155, 150, 200);
contentPane.add(lblImg1);
final JLabel lblImg4 = new JLabel("\u56FE\u72471");
jlbImg4 = new JLabel();
jlbImg4.setBackground(Color.RED);
lblImg4.setBounds(90, 270, 185,201);
contentPane.add(lblImg4);
this.add(jlbImg4);
// 标签，显示第二个学生相片
final JLabel lblImg2 = new JLabel(" ");
lblImg2.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg1) {
if(arg1.getSource()==lblImg2){
if(( lblImg2.getText().equals(lbGuessName.getText()))){
JOptionPane.showMessageDialog(null,"恭喜你猜对了","提示",JOptionPane.PLAIN_MESSAGE);
}
else {
JOptionPane.showMessageDialog(null,"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);
final JLabel lblImg5 = new JLabel("\u56FE\u72472");
jlbImg5 = new JLabel();
jlbImg5.setBackground(Color.RED);
lblImg5.setBounds(300, 270, 185,201);
contentPane.add(lblImg5);
this.add(jlbImg5);
// 标签，显示第三个学生相片
final JLabel lblImg3 = new JLabel(" ");
lblImg3.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg2) {
if(arg2.getSource()==lblImg3){
if(( lblImg3.getText().equals(lbGuessName.getText()))){
JOptionPane.showMessageDialog(null,"恭喜你猜对了","提示",JOptionPane.PLAIN_MESSAGE);
}
else {
JOptionPane.showMessageDialog(null,"你猜错了！","错误",JOptionPane.ERROR_MESSAGE);
}
}
}
});
lblImg3.setBounds(434,155, 150,200);
contentPane.add(lblImg3);
final JLabel lblImg6 = new JLabel("\u56FE\u72473");
jlbImg6 = new JLabel();
jlbImg6.setBackground(Color.RED);
lblImg6.setBounds(485, 270, 185,201);
contentPane.add(lblImg6);
this.add(jlbImg6);
// 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());
//循环三次
ImageIcon icon;
int j = 0,h = 0,l = 0,j1 = 0,h1 = 0,l1 = 0;
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);
//随机输出三张照片
if(index==NUM_IMG)
index = 0;
switch(i)
{
case 0:
System.out.println(index);
lblImg1.setIcon(icon);
lblImg1.setText(filename1);
h=index;
h1=index;
break;
case 1:
System.out.println(index);
lblImg2.setIcon(icon);
lblImg2.setText(filename1);
j=index;
j1=index;
break;
case 2:
System.out.println(index);
lblImg3.setIcon(icon);
lblImg3.setText(filename1);
l=index;
l1=index;
break;
}
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
int []data1 = {j,h,l,j1,l1,h1};
Random r=new Random();
StringBuffer str1=new StringBuffer();
str1.append(data1[r.nextInt(4)]);
String filename = str1.toString();
System.out.println(str1);
int a = Integer.parseInt(filename);
String filename1 = fileArray[a].getName();
lbGuessName.setText(filename1);
}
}
});
btnGuessAgain.setBounds(250, 430, 93, 23);
contentPane.add(btnGuessAgain);
}
}
结果如图所示：
总结：
《猜猜看》这个游戏终于做出来了。利用随机数随机选取三张照片，然后进行压缩并输出到三个指定的面板上。再从三张图片中随机抽取一张图片读取图片的名字再输出到名字面板。整个过程中，最难的是随机数和压缩图片的代码，随机数做了两台才做好。
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