public class Test {

 /**
  * @param args
  * @throws java.text.ParseException
  */

 public static void main(String[] args) throws java.text.ParseException {
  // Date dateNow = new Date();
  //
  // String dateNowStr = dateFormat.format(dateNow);
  // System.out.println(dateNowStr);

  final String dayNames[] = { "星期日", "星期一", "星期二", "星期三", "星期四", "星期五",
    "星期六" };
  SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy年MM月dd日");

  Calendar calendar = Calendar.getInstance();
  Date date = new Date();
  String datarq = dateFormat.format(date); //日期
  
  calendar.setTime(date);
  int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK) - 1;
  if (dayOfWeek < 0)
   dayOfWeek = 0;

  System.out.println(datarq + "  " + dayNames[dayOfWeek]);

 }

}

开始–运行–cmd 进入命令提示符 输入netstat -ano 即可看到所有连接的PID 之后在任务管理器中找到这个PID所对应的程序如果任务管理器中没有PID这一项,可以在任务管理器中选”查看”-”选择列”

经常，我们在启动应用的时候发现系统需要的端口被别的程序占用，如何知道谁占有了我们需要的端口，很多人都比较头疼，下面就介绍一种非常简单的方法，希望对大家有用。

我们需要确定谁占用了我们的80端口

在windows命令行窗口下执行：
C:\>netstat -aon|findstr “80″
 TCP    0.0.0.0:19780             0.0.0.0:0                    LISTENING         2044
 TCP    10.72.224.5:2558       96.17.109.8:80          ESTABLISHED     2044
 TCP    10.72.224.5:2757       60.210.176.209:80    TIME_WAIT         0
 TCP    10.72.224.5:3956       125.46.1.234:80        ESTABLISHED     2044
 TCP    10.72.224.5:3959       125.46.1.234:80        ESTABLISHED     2044
 UDP    0.0.0.0:2280               *:*                                                       3700

看到了吗，端口被进程号为2044的进程占用，继续执行下面命令：
C:\>tasklist|findstr “2044″
avp.exe                     2044 Console                 0     37,680 K
很清楚吧，avp 卡巴监听80端口，调整卡巴网络监听设置。
当然，如果你的80端口被其他程序占用，kill掉或者调整端口。

package l6;
/**
 * 实现栈的数据结构
 */
import java.util.LinkedList;

public class MyStack {
 LinkedList mylist = new LinkedList();

 public void push(Object o) {
  mylist.addFirst(o);
 }

 public Object pop() {
  return mylist.removeFirst();
 }

 public Object peek() {
  return mylist.getFirst();
 }

 public boolean empty() {
  return mylist.isEmpty();
 }
 
 
 public static void main(String[] args) {
  MyStack  ms = new MyStack();
  ms.push("1");
  ms.push("2");
  ms.push("3");
  ms.push("4");
  
  System.out.println(ms.pop());
  System.out.println(ms.pop());
  System.out.println(ms.peek());
  System.out.println(ms.empty());
 }
}

package l6;

import java.util.LinkedList;

/**
 * 实现队列的数据结构
 *
 */
public class MyQueue {

 private LinkedList ll = new LinkedList();

 public void put(Object o) {
  ll.addLast(o);
 }

 public Object get() {
  return ll.removeFirst();
 }

 public Object peek() {
  return ll.getFirst();
 }

 public boolean empty() {
  return ll.isEmpty();
 }

 /**
  * @param args
  */
 public static void main(String[] args) {

  MyQueue mq = new MyQueue();
  mq.put("1");
  mq.put("2");
  mq.put("3");
  mq.put("4");
  mq.put("5");
  mq.put("6");

  System.out.println(mq.get());
  System.out.println(mq.get());
  System.out.println(mq.get());
  System.out.println(mq.get());
  System.out.println(mq.peek());
  System.out.println(mq.empty());
 }

}

//学生类
package l6;

import java.util.Comparator;

public class Student implements Comparable {

 public int num;
 public String name;
 

 public Student(int num, String name) {
  this.num = num;
  this.name = name;
 }

 public int compareTo(Object o) {
  Student s = (Student) o;
  if (num > s.num) {
   return 1;
  } else if (num == s.num) {
   return 0;
  } else {
   return -1;
  }
 }

 public String toString() {
  return "num:" + num + " name:" + name;
 }

 public int compare(Object o1, Object o2) {
  // TODO Auto-generated method stub
  return 0;
 }
}

//学生比较器

package l6;

import java.util.Comparator;

public  class StudentComparator implements Comparator {

 public int compare(Object o1, Object o2) {
  Student s1 = (Student) o1;
  Student s2 = (Student) o2;
  if (s1.num > s2.num) {
   return 1;
  } else if (s1.num < s2.num) {
   return -1;
  } else {
   return s1.name.compareTo(s2.name);
  }
 }
}

//测试类
package l6;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;

public class ArrayListTest {

 /**
  * @param args
  */

 public static void main(String[] args) {

  ArrayList<Student> slist = new ArrayList<Student>();
  Student s1 = new Student(1, "z1");
  slist.add(s1);
  Student s3 = new Student(2, "z3");
  slist.add(s3);
  Student s2 = new Student(2, "z2");
  slist.add(s2);
  Student s5 = new Student(2, "z5");
  slist.add(s5);
  Student s4 = new Student(4, "z4");
  slist.add(s4);

   // Collections.sort(slist); //未使用比较器
    Collections.sort(slist, new StudentComparator());//未使用比较器
  PaintE(slist);

 }

 public static void PaintE(Collection c) {
  Iterator it = c.iterator();
  while(it.hasNext()){
   System.out.println(it.next().toString());
  }
  

 }

}

 

 

//All the divs on the page:
$$('div');

//All the divs and paragraphs
//note: this returns an array with all the divs first,then all the paragraphs:
$$('div', 'p');

//All the divs with the css class 'myClass':
$$('div.myClass')

/All the paragraphs that are inside divs:
$$('div p');

//All the bold tags in paragraphs with Class 'foo' in divs with class 'myClass':
$$('div.myClass p.foo b');

<1>hasClass 应用
Examples:
HTML
<div id="myElement" class="testClass"></div>
JavaScript
$('myElement').hasClass('testClass'); // returns true

<2>addClass 应用

Examples:
HTML
<div id="myElement" class="testClass"></div>
JavaScript
$('myElement').addClass('newClass');

<3>removeClass 应用
Examples:
HTML
<div id="myElement" class="testClass newClass"></div>
JavaScript
$('myElement').removeClass('newClass');
Resulting HTML
<div id="myElement" class="testClass"></div>

<4>toggleClass 应用
Adds or removes the passed in class name to the Element, depending on whether or not it's already present.
Examples:
HTML
<div id="myElement" class="myClass"></div>
JavaScript
$('myElement').toggleClass('myClass');
Resulting HTML
<div id="myElement" class=""></div>

JavaScript
$('myElement').toggleClass('myClass');
Resulting HTML
<div id="myElement" class="myClass"></div>