《Java课程实习》日志（周四）&&课程设计：《猜猜看》游戏

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.Image;
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.FilenameFilter;
import java.io.IOException;
import java.util.Random;

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
int NUM_IMG = 0;    // 文件总数目
int index  = 0;

String strPath = "";    //文件夹路径
String strFileName = "";    //文件名称

JLabel lblImg1 = null;
JLabel lblImg2 = null;
JLabel lblImg3 = null;
JLabel lbGuessName =null;
/**
* 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");
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 按钮的处理程序
final JButton btnDir = new JButton("目录");
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()){

// 获取文件夹下所有的文件
fileArray = file.listFiles();

NUM_IMG = fileArray.length;
if(e.getSource()==btnDir){

File f = new File(strPath);
String[] names = f.list(new FilenameFilter(){
public boolean accept(File f , String name){
return name.endsWith(".jpg");

}
});

Random r = new Random();
String strTmp = strPath+"/"+names[r.nextInt(108)];
String strTmp1 =strPath+"/"+names[r.nextInt(108)];
String strTmp2 = strPath+"/"+ names [r.nextInt(108)];

lblImg1.setIcon(new ImageIcon(strTmp));
lblImg2.setIcon(new ImageIcon(strTmp1));
lblImg3.setIcon(new ImageIcon(strTmp2));
}
}
}
}
});

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
final JButton btnClass = new JButton("班级");
btnClass.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JFileChooser jfc=new JFileChooser();
//jfc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES );
//jfc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
jfc.setFileSelectionMode(JFileChooser.FILES_ONLY);
File file=jfc.getSelectedFile();
jfc.showDialog(new JLabel(), "选择");
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
tfClass.setText(file.getAbsolutePath());
// 获取文件路径 与文件名
strPath = file.getAbsolutePath();
strFileName = jfc.getSelectedFile().getName();
//获取文件夹下所有的文件
fileArray = file.listFiles();
NUM_IMG = fileArray.length;

}
});

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("学生姓名");

lbGuessName.setFocusable(true);
lbGuessName.setBounds(259, 91, 102, 23);
contentPane.add(lbGuessName);

// 标签，显示第一个学生相片
lblImg1 = new JLabel("学生一");
lblImg1.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {

}
});
lblImg1.setForeground(Color.BLACK);
lblImg1.setBounds(26, 151, 183, 178);
contentPane.add(lblImg1);

// 标签，显示第二个学生相片
lblImg2 = new JLabel("学生二");
lblImg2.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {

}
});
lblImg2.setForeground(Color.BLACK);
lblImg2.setBounds(241, 155, 183, 172);
contentPane.add(lblImg2);

// 标签，显示第三个学生相片
lblImg3 = new JLabel("学生三");
lblImg3.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg2) {

}
});
lblImg3.setForeground(Color.BLACK);
lblImg3.setBounds(430, 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("再猜");
btnGuessAgain.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {

if(e.getSource()==btnGuessAgain){

//当前时间作为种子，避免两个Random对象产生同样的数字序列
//Random random = new Random(System.currentTimeMillis());
Random random = new Random();
ImageIcon icon;//定义icon变量
for(int i=0;i<3;i++)
{
index = random.nextInt(NUM_IMG);
String strTmp = fileArray[index].toString();
try {

icon = new ImageIcon(ImageIO.read(new File(strTmp)));

Image image = icon.getImage(); // 从图表中获取到图片

Image smallImage = image.getScaledInstance(100,100,Image.SCALE_FAST);// 缩放图像

icon = new ImageIcon(smallImage);//把Image文件转化为ImageIcon
//借鉴一下同学的
if(index==NUM_IMG)
index = 0;
switch(i)
{
case 0:
lblImg1.setIcon(icon);
break;
case 1:
lblImg2.setIcon(icon);
break;
case 2:
lblImg3.setIcon(icon);
break;
}
} catch (IOException e1) {

e1.printStackTrace();
}
}
}
}
});

btnGuessAgain.setBounds(223, 337, 93, 23);
contentPane.add(btnGuessAgain);
}
}

//随机数方式显示图片。。。还有文字随机显示，最后再考虑消息框