Java第六次作业

import java.awt.*;

import javax.swing.*;

import java.awt.event.*;

import java.util.*;

import java.util.Timer;

import java.io.*;

class ChouJiang {

JFrame frame = new JFrame();

JLabel label_name = new JLabel("姓名");

JLabel label_num = new JLabel("学号");

jPanel photo = new jPanel();

JButton startButton = new JButton("开始抽奖");

JButton stopButton = new JButton("结束抽奖");

int index; // 保持学生信息与头像的同步

ArrayList<Student> array = null; // 存储读出来的学生信息

Timer timer;

public ChouJiang() {

// 读取学生信息

array = new ArrayList<Student>();

try {

BufferedReader bufferReader = new BufferedReader(new FileReader( "student/stu2.txt"));

StringBuffer stringBuffer = new StringBuffer();

String lineContent = null;

String name = "";

int num = 0;

while ((lineContent = bufferReader.readLine()) != null) {

// 每一行区分的标识符是空格

StringTokenizer st = new StringTokenizer(lineContent, " ");

// 读取学号和姓名。每一行只有两个元素，所以I的取值就是0和1,0代表学号，1代表姓名

for (int i = 0; st.hasMoreElements(); i++) {

String word = (String) st.nextElement();

if (i == 0) {

num = Integer.parseInt(word);

} else {

name = word;

}

}

Student student = new Student(name, num);

array.add(student);

}

} catch (IOException e) {

e.printStackTrace();

}

frame.getContentPane().add(BorderLayout.WEST, startButton);

frame.getContentPane().add(BorderLayout.EAST, stopButton);

frame.getContentPane().add(BorderLayout.NORTH, label_num);

frame.getContentPane().add(BorderLayout.SOUTH, label_name);

frame.getContentPane().add(BorderLayout.CENTER, photo);

startButton.addActionListener(new startlButtonListener());

stopButton.addActionListener(new endButtonListener());

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setSize(400, 400);

frame.setVisible(true);

index = 0; }

class MyTask extends TimerTask {

public void run() {

int end = (int) (Math.random() * array.size());

for (int i = 0; i < end; i++) {

abel_num

.setText("学号：" + String.valueOf(array.get(i).getNum()));

label_name.setText("姓名：" + array.get(i).getName());

index = i;

frame.repaint();

try {

Thread.sleep(5);

} catch (Exception e) {

e.printStackTrace();

}

}

}

}

class startlButtonListener implements ActionListener {

public void actionPerformed(ActionEvent event) {

timer = new Timer();

timer.scheduleAtFixedRate(new MyTask(), 0, 100);

}

}

class endButtonListener implements ActionListener {

public void actionPerformed(ActionEvent event) {

timer.cancel();

}

}

class jPanel extends JPanel {

private static final long serialVersionUID = 1L;

public void paintComponent(Graphics g) {

Image image = new ImageIcon("image/" + index + ".jpg").getImage();

g.drawImage(image, 60, 100, this);

}

}

}

class Student { private String name; private int num;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getNum() {

return num;

}

public void setNum(int num) {

this.num = num;

}

public Student(String name, int num) {

this.name = name;

this.num = num;

}

public void print() {

System.out.println(num + " " + name);

}

}

public class choujiang {

public static void main(String[] args) {

ChouJiang cj = new ChouJiang();

}

}