麻烦看一下这个程序，文件读取不进来
程序代码：package jrr;
import *;
import java.util.*;
public class ReadTestquestion {
String filename="",
correctAnswer="",//正确答案
testContent="",//考试题目内容
selection="";//考生答案 //gai
int score=0;//考生成绩
long time=0;//考试时间
boolean wcks=false;
File f=null;
FileReader in=null;
BufferedReader dqxx=null;
static int t;
public void setFilename(String name){
filename=name;
score=0;
selection="";
try{
if(in!=null&&dqxx!=null)
{in.close();
dqxx.close();}
f=new File(filename);
in=new FileReader(f);
dqxx=new BufferedReader(in);
correctAnswer=(dqxx.readLine()).trim();
String temp=(dqxx.readLine()).trim();
StringTokenizer token=new StringTokenizer(temp,":");
int hour=Integer.parseInt(token.nextToken());//取出小时
int minute=Integer.parseInt(token.nextToken());//分钟
int second=Integer.parseInt(token.nextToken());//秒
time=1000*(second+minute*60+hour*60*60);
}
catch(Exception e)
{
testContent="没有选择试题";
}
}
public String getFilename(){return filename;}
public long getTime(){return time;}
public void setWcks(boolean b){wcks=b;}
public boolean getWcks(){return wcks;}
public String getTestContent(){
try{
String s=null;
StringBuffer temp=new StringBuffer();
if(dqxx!=null){
while((s=dqxx.readLine())!=null){
if(s.startsWith("danxuan")){
t=1;
}
else if(s.startsWith("duoxuan")){
t=2;
}
else if(s.startsWith("tiankong")){
t=3;
}
else if(s.startsWith("panduan")){
t=4;
}
if(s.startsWith("**"))
break;
temp.append("\n"+s);
if(s.startsWith("extend")){
in.close();
dqxx.close();
wcks=true;
}
}
testContent=new String(temp);
}
else{testContent=new String("没有选择试题");}
}
catch(Exception e){
testContent="试题内容为空，考试结束";
}
return testContent;
}
public void setSelection(String s){
selection=selection+s;
}
public int getScore(){
score=0;
int length1=selection.length();
int length2=correctAnswer.length();
int min=Math.min(length1,length2);
for(int i=0;i<min;i++){
try{
if(selection.charAt(i)==correctAnswer.charAt(i))
score++;
}
catch(StringIndexOutOfBoundsException e){
i=0;}
}
return score;
}
public int getNum(){
return t;
}
public String getMessages(){
int length1=selection.length();
int length2=correctAnswer.length();
int length=Math.min(length1,length2);
String message="zhengquedaan"+correctAnswer.substring(0,length)+"\n"+"nidehuida"+selection;
return message;
}
}
程序代码：package jrr;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import *;
class FileName implements FilenameFilter{
String str=null;
FileName(String s){
str="."+s;
}
public boolean accept(File dir,String name) {
return name.endsWith(str);
}
}
public class TestArea extends JPanel implements ActionListener,ItemListener,Runnable{
Choice list=null;
JTextArea stxsq=null,xxq=null;
JCheckBox box[];
JRadioButton box2[];
JRadioButton box3[];
JButton dqxyt,ckfs;
ReadTestquestion dqst=null;
JLabel welcomeLabel=null;
Thread countTime=null;
static int a=0;
long time=0;
JTextField timeShow=null;
boolean sfgbjsq=false,sfztjs=false;
JButton zthjxjs=null;
public TestArea() {
list=new Choice();
String dqml=System.getProperty("user.dir");
File dir=new File(dqml);
FileName fileTxt=new FileName("txt");
String fileName[]=dir.list(fileTxt);
for(int i=0;i<fileName.length;i++) {
list.add(fileName[i]);
}
stxsq=new JTextArea(15,12);
stxsq.setLineWrap(true);
stxsq.setWrapStyleWord(true);
stxsq.setFont(new Font("TimesRoman",Font.PLAIN,14));
stxsq.setForeground(Color.BLUE);
xxq=new JTextArea(8,8);
xxq.setForeground(Color.BLUE);
xxq.setLineWrap(true);
xxq.setWrapStyleWord(true);
countTime=new Thread(this);
zthjxjs=new JButton("暂停计时");
zthjxjs.addActionListener(this);
//tjbtda=new JButton("提交本题答案");
dqxyt=new JButton("读取第一题");
dqxyt.setEnabled(false); //kaishibuduqu
dqxyt.setForeground(Color.BLUE);
//tjbtda.setForeground(Color.BLUE);
ckfs=new JButton("查看分数");
ckfs.setForeground(Color.BLUE);
//tjbtda.setEnabled(false);
//tjbtda.addActionListener(this);
dqxyt.addActionListener(this);
ckfs.addActionListener(this);
list.addItemListener(this);
dqst=new ReadTestquestion();
String s[]= {"A","B","C","D"};//多选
box=new JCheckBox[4];
for(int i=0;i<4;i++) {
box[i]=new JCheckBox(s[i]);}
String s2[]= {"A","B","C","D"};//单选
box2=new JRadioButton[4];
ButtonGroup group=new ButtonGroup();
for(int i=0;i<4;i++) {
box2[i]=new JRadioButton(s2[i]);
group.add(box2[i]);}
String s3[]= {"T","F"};//单选
box3=new JRadioButton[2];
ButtonGroup group2=new ButtonGroup();
for(int i=0;i<2;i++) {
box3[i]=new JRadioButton(s3[i]);
group2.add(box3[i]);}
JPanel pAddbox=new JPanel();
for(int i=0;i<4;i++) {
pAddbox.add(box[i]);
pAddbox.add(box2[i]);
}
for(int i=0;i<2;i++) {
pAddbox.add(box3[i]);
}
Box boxH1=Box.createVerticalBox();
Box boxH2=Box.createVerticalBox();
Box baseBox=Box.createHorizontalBox();
boxH1.add(new JLabel("选择试题文件"));
boxH1.add(list);
boxH1.add(new JScrollPane(xxq));
boxH1.add(ckfs);
timeShow=new JTextField(20);
timeShow.setHorizontalAlignment(SwingConstants.RIGHT);
timeShow.setEditable(false);
JPanel p1=new JPanel();
p1.add(new JLabel("剩余时间或者成绩显示"));
p1.add(timeShow);
p1.add(zthjxjs);
boxH1.add(p1);
boxH2.add(new JLabel("试题内容:"));
boxH2.add(new JScrollPane(stxsq));
JPanel p2=new JPanel();
p2.add(pAddbox);
//p2.add(tjbtda);
p2.add(dqxyt);
boxH2.add(p2);
baseBox.add(boxH1);
baseBox.add(boxH2);
setLayout(new BorderLayout());
add(baseBox,BorderLayout.CENTER);
welcomeLabel=new JLabel("欢迎考试,提高技能水平",JLabel.CENTER);
welcomeLabel.setFont(new Font("隶书",Font.PLAIN,24));
welcomeLabel.setForeground(Color.BLUE);
add(welcomeLabel,BorderLayout.NORTH);
}
public void itemStateChanged(ItemEvent e) {
timeShow.setText(null);
sfgbjsq=false;
sfztjs=false;
zthjxjs.setText("暂停计时");
String name=(String)list.getSelectedItem();
dqst.setFilename(name);
dqst.setWcks(false);
time=dqst.getTime();
if(countTime.isAlive()) {
sfgbjsq=true;
countTime.interrupt();
}
countTime=new Thread(this);
xxq.setText(null);
stxsq.setText(null);
dqxyt.setText("读取第一题");
//tjbtda.setEnabled(false);
dqxyt.setEnabled(true);
welcomeLabel.setText("你选择的试题:"+dqst.getFilename()+"沉着冷静,胆大心细");
}
public void actionPerformed(ActionEvent e) {
if(e.getSource()==dqxyt) {
String contentTest=dqst.getTestContent();
int t=dqst.getNum();
if(t==1){
for(int i=0;i<4;i++) {
box[i].setVisible(false);
box2[i].setVisible(true);
}
}
else if(t==2){
for(int i=0;i<4;i++) {
box[i].setVisible(true);
box2[i].setVisible(false);}
}
dqxyt.setText("读取下一题");
//tjbtda.setEnabled(true);
stxsq.setText(contentTest);
xxq.setText(null);
dqxyt.setEnabled(true);
try {
countTime.start();
}
catch(Exception event) {}
String answer="?";//bianchengyige
for(int i=0;i<4;i++) {
if(box[i].isSelected()) {
answer=box[i].getText();////////////////////////////////
box[i].setSelected(false);
break;
}
}
if(a>0)
{
dqst.setSelection(answer);
}
a++;
}
//if(e.getSource()==tjbtda) {
//dqxyt.setEnabled(true);
//tjbtda.setEnabled(false);
//String answer="?";
//for(int i=0;i<4;i++) {
// if(box[i].isSelected()) {
// answer=box[i].getText();
// box[i].setSelected(false);
// break;
// }
//}
//dqst.setSelection(answer);
//}
if(e.getSource()==ckfs) {
int score=dqst.getScore();
String messages=dqst.getMessages();
xxq.setText("\n"+messages);
}
if(e.getSource()==zthjxjs) {
if(sfztjs==false) {
zthjxjs.setText("继续计时");
sfztjs=true;
}
else if(sfztjs==true) {
zthjxjs.setText("暂停计时");
sfztjs=false;
countTime.interrupt();
}
}
}
public synchronized void run() {
while(true) {
if(time<=0) {
sfgbjsq=true;
countTime.interrupt();
//tjbtda.setEnabled(false);
dqxyt.setEnabled(false);
timeShow.setText("考试时间到,考试自动结束,请看清成绩并离开考场!");
}
else if(dqst.getWcks()) {
sfgbjsq=true;
timeShow.setText("您的考试成绩是="+dqst.getScore());
countTime.interrupt();
//tjbtda.setEnabled(false);
dqxyt.setEnabled(false);
}
else if(time>=1) {
time=time-1000;
long leftTime=time/1000;
long leftHour=leftTime/3600;
long leftMinute=(leftTime-leftHour*3600)/60;
long leftSecond=leftTime%60;
timeShow.setText(""+leftHour+"小时"+leftMinute+"分"+leftSecond+"秒");
}
try{Thread.sleep(1000);}
catch(InterruptedException ee) {
if(sfgbjsq==true)
return;
}
while(sfztjs==true) {
try {wait();}
catch(InterruptedException ee) {
if(sfztjs==false) {
notifyAll();
}
}
}
}
}
}
程序代码：package jrr;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Test extends JFrame {
TestArea testPanel=null; //调用TestArea类
Container con=null; //dingyi rongqi
public Test(){
super("计算机考试系统");
testPanel=new TestArea();
con=getContentPane();
con.add(testPanel,BorderLayout.CENTER);
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
setVisible(true);
setBounds(60,40,760,560);
con.validate();
validate();}
public static void main(String args[]){
new Test();
}
}
在学校电脑可以，自己的不好使，就是点完TXT文档读取下一题的纽还是不可用的，文件没有读进来
TXT文件
BDBAB
0:10:00
danxuan
1.java是一种（ ）的语言
A、面向过程 B、面向对象
C、面向过程同时面向对象 D、无法确定
*****
danxuan
2.以下软件中，（ ）是数据库软件？
A、windows B、office
C、ie D、sql server
*****
duoxuan
3.java通过（ ）访问数据库
A、DBMS、 B、JDBC
C、ODBC D、XML
*****
duoxuan
4.JAVA中，通过（）命令引入包
A、import B、download
C、javac D、include
*****
Ended
