本文目录一览：
- 求一个JAVA编程计数器的代码！
- java计数器
- 计数器的java代码
- 试编写java代码实现一个计数器类（Computer），其中包括：变量value初始值为0
- JAVA编写一个完整的计数器类Count，写出源代码
求一个JAVA编程计数器的代码！
什么技术器？ 网站流量还是网页计数器？ =======================以下是一个js计数器=======================
function www_webjx_com(offset) {
var endstr = document.cookie.indexOf(";", offset);
if (endstr == -1)
endstr = document.cookie.length;
return unescape(document.cookie.substring(offset, endstr));
}
function GetCookie(name) {
var arg = name + "=";
var alen = arg.length;
var clen = document.cookie.length;
var i = 0;
while (i < clen) {
var j = i + alen;
if (document.cookie.substring(i, j) == arg)
return www_webjx_com(j);
i = document.cookie.indexOf(" ", i) + 1;
if (i == 0)
break;
}
return null;
}
function SetCookie(name, value) {
var argv = SetCookie.arguments;
var argc = SetCookie.arguments.length;
var expires = (2 < argc) ? argv[2] : null;
var path = (3 < argc) ? argv[3] : null;
var domain = (4 < argc) ? argv[4] : null;
var secure = (5 < argc) ? argv[5] : false;
document.cookie = name + "=" + escape(value) +
((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
((path == null) ? "" : ("; path=" + path)) +
((domain == null) ? "" : ("; domain=" + domain)) +
((secure == true) ? "; secure" : "");
}
var expdate = new Date();
var visits;
expdate.setTime(expdate.getTime() + (24 * 60 * 60 * 1000 * 365)); //设置COOKIES时间为1年,自己随便设置
if (!(visits = GetCookie("visits")))
visits = 0;
visits++;
SetCookie("visits", visits, expdate, "/", null, false);
//以下信息显示可以使用标准的HTML语法,自己随便设置
document.write("你已经光临本页 <FONT COLOR=red>" + visits + "</FONT> 次！");
if (visits == 1) //来访1次的信息显示
document.write("<br>欢迎光临本站，觉得本站内容如何？");
if (visits == 2) //来访2次的信息显示，以下类推，自己随便增加
document.write("<br>再次光临不胜容幸!今后要常来啊！欢迎点击本站广告。");
if (visits == 3)
document.write("<br>常客，在本站的论坛发个帖子如何？");
if (visits == 4)
document.write("<br>你这个疯子!");
if (visits >= 5)
document.write("<br>疯狂的家伙!我真的非常喜欢你。");
优点：js，直接粘贴至html中就可以了。 缺点：是页面计数计数，计算某个人访问某个网页的次数，不是网站的访问量，如果你要的是网站访问量统计，你留下qq/msn我发文件给你。
java计数器
参考下面代码：
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class Test extends JFrame implements ActionListener {
private static final long serialVersionUID = 1L;
private JLabel lbl;
private JButton btn1;
private JButton btn2;
private JButton btn3;
private int con;
public static void main(String args[]) {
try {
Test test = new Test();
test.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
public Test() {
super();
getContentPane().setLayout(null);
setTitle("Test");
setName("");
setResizable(false);
setBounds(100, 100, 300, 216);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
lbl = new JLabel();
lbl.setText(String.valueOf(con));
lbl.setBounds(84, 58, 96, 25);
getContentPane().add(lbl);
btn1 = new JButton();
btn1.setText("+ 1");
btn1.setBounds(29, 106, 64, 26);
btn1.addActionListener(this);
getContentPane().add(btn1);
btn2 = new JButton();
btn2.setText("- 1");
btn2.setBounds(99, 106, 64, 26);
btn2.addActionListener(this);
getContentPane().add(btn2);
btn3 = new JButton();
btn3.setText("Clear");
btn3.setBounds(169, 106, 64, 26);
btn3.addActionListener(this);
getContentPane().add(btn3);
}
public void actionPerformed(ActionEvent e) {
if (e.getSource() == btn1) {
con = Integer.parseInt(lbl.getText());
con++;
lbl.setText(String.valueOf(con));
}
if (e.getSource() == btn2) {
con = Integer.parseInt(lbl.getText());
con--;
lbl.setText(String.valueOf(con));
}
if (e.getSource() == btn3) {
lbl.setText(String.valueOf(0));
}
}
}
计数器的java代码
看书觉得很容易，真正写代码才发现真不容易，累死。 我也是JAVA初学者（学了不到半年），代码肯定有不合适的地方，凑合看吧，反正功能是完成了，代码如下：
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TestClock extends JFrame {
public TestClock() {
JPanel jp = new JPanel();
final JLabel jl = new JLabel("0");
jp.add(jl);
add(jp, BorderLayout.CENTER);
JButton jbStart = new JButton("开始");
jbStart.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JButton j = (JButton) e.getSource();
j.setEnabled(false);
dt = new DamThread(new ClockThread(jl));
dt.start();
}
});
JButton jbPause = new JButton("暂停");
jbPause.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JButton j = (JButton) e.getSource();
String s = (String) e.getActionCommand();
if (s.equals("暂停")) {
dt.setStatus(ClockStatus.PAUSE);
j.setText("继续");
} else {
dt.setStatus(ClockStatus.CONTINUE);
j.setText("暂停");
}
}
});
JButton jbZero = new JButton("清零");
jbZero.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
dt.setStatus(ClockStatus.ZERO);
}
});
JButton jbStop = new JButton("停止");
jbStop.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
dt.setStatus(ClockStatus.STOP);
}
});
JPanel jp1 = new JPanel();
jp1.add(jbStart);
jp1.add(jbPause);
jp1.add(jbZero);
jp1.add(jbStop);
add(jp1, BorderLayout.SOUTH);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack();
setLocationRelativeTo(null);
}
public static void main(String[] args) {
TestClock tc = new TestClock();
tc.setVisible(true);
}
DamThread dt;
}
class DamThread extends Thread {
public DamThread(ClockThread c) {
this.ct = c;
ct.start();
this.setDaemon(true);
this.STATUS = ClockStatus.START;
}
public void run() {
while (ct.isAlive()) {
CheckStatus();
}
}
private void CheckStatus() {
switch (getStatus()) {
case PAUSE:
ct.mysuspend();
break;
case ZERO:
ct.seti(0);
ct.label.setText("0");
setStatus(ClockStatus.START);
break;
case STOP:
ct.seti(1001);
break;
case CONTINUE:
ct.myresume();
break;
default:
break;
}
}
public void setStatus(ClockStatus cs) {
this.STATUS = cs;
}
public ClockStatus getStatus() {
return STATUS;
}
ClockStatus STATUS;
ClockThread ct;
}
class ClockThread extends Thread {
public ClockThread(JLabel j) {
this.label = j;
suspendFlag = false;
}
public void run() {
while (i <= 1000) {
try {
i++;
label.setText("" + i);
synchronized (this) {
while (suspendFlag) {
wait();
}
}
sleep(100);
} catch (InterruptedException ex) {
ex.printStackTrace();
}
}
}
public void seti(int in) {
this.i = in;
}
public void mysuspend() {
suspendFlag = true;
}
synchronized void myresume() {
suspendFlag = false;
notify();
}
private boolean suspendFlag;
private int i = 0;
JLabel label;
}
enum ClockStatus {
START, PAUSE, ZERO, STOP, CONTINUE
}
试编写java代码实现一个计数器类（Computer），其中包括：变量value初始值为0
class Computer {
int value;
Computer(int value) {
this.value = value;
}
public void add() {
System.out.println("Value:" + value + "-" + (value + 1));
value++;
}
public void sub() {
System.out.println("Value:" + value + "-" + (value - 2));
value -= 2;
}
public void clear() {
System.out.println("Value:" + value + "-" + 0);
value = 0;
}
}
public class Demo {
public static void main(String[] args) {
Computer computer = new Computer(10);
computer.add();
computer.sub();
computer.clear();
}
}
JAVA编写一个完整的计数器类Count，写出源代码
public class Count {
int countValue;
Count() {
countValue = 0;
}
public void increment() {
countValue++;
}
public void decrement() {
countValue--;
}
public void reset() {
countValue = 0;
}
public int getCountValue() {
return countValue;
}
public static void main(String args[]) {
Count c = new Count();
c.increment();
System.out.println(c.getCountValue());
c.reset();
System.out.println(c.getCountValue());
}
}
运行结果:
1
0
