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1.±éÀúÎļþ¼Ð(±»Õâ¸öÌâÄ¿¿¼ÁËÁ½´Î)
import java.io.File;
public class ListFile {
public static void main(String[] args) {
// TODO Auto-generated method stub
String path = "C:/Inetpub";
File f = new File(path);
list(f);
}
public static void list(File f){
if(f.isDirectory()){
File[] files = f.listFiles();//listFiles·½·¨
for(int i= 0;i<files.length;i++)
list(files[i]);
}
else
System.out.println(f.getName());
}
}
2.2³ËÒÔ8ÓøßЧµÄ·½·¨
2<<3 (±ÊÊÔʱºò±»ÎÒд³É2<<<3,javaÀïûÕâ¸öÔËËã·û)
3.µ¥Àýģʽ(Õâ¸öÒ²¿¼ÁËÁ½´Î)
public class Singleton {
private static Singleton _intance = null;
private Singleton() {
}
public synchronized static Singleton getInstance() {
if (_intance == null) {
_intance = new Singleton();
}
return _intance;
}
public static void main(String[] args){
Singleton s1 = Singleton.getInstance();
Singleton s2 = Singleton.getInstance();
System.out.println(s1 == s2);
}
}
//synchronized ¹Ø¼ü×ÖÀϱ»ÎÒÍüµô
4.¹Û²ìÕßģʽ
http://ttitfly.javaeye.com/blog/152512 (Õâ¸öдµÄ±È½Ï¼òµ¥Ò×¶®)
5.ClassLoaderÔÀí
http://blog.csdn.net/tang08/archive/2007/11/21/1896093.aspx
6.¶àÏß³Ì Ïû·ÑÕßÒÔ¼°Éú²úÕß
//´ËÀýÀ´×Ô http://java.chinaitlab.com/line/798695.html
import java.util.ArrayList;
import java.util.List;
//Ïû·ÑÕß
class Consume implements Runnable {
private List container = null;
private int count;
public Consume(List lst) {
this.container = lst;
}
public void run() {
while (true) {
synchronized (container) {
if (container.size() == 0) {
try {
// waitµ¼Öµ±Ç°µÄÏ̵߳ȴý,·ÅÆúËø,Ö±µ½ÆäËûÏ̵߳÷Óô˶ÔÏóµÄ notify() ·½·¨»ò notifyAll() ·½·¨
container.wait();
} catch (InterruptedException e) {
e.pri
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4.µ¥Ì¬Ä£Ê½ DAOģʽ ×°ÊÎģʽ
5.»º´æ£ºÊý¾Ý»º´æ ·þÎñÆ÷¶Ë»º´æ ¿Í»§¶Ë»º´æ
6.ORM EJB[ÈýÖÖBean]
7.JMS
8.MVC¿ª·¢Ä£Ê½
9.W ......
// ×¢²áÓ¦ÓóÌÐòÈ«¾Ö¼üÅÌʼþ, ËùÓеļüÅÌʼþ¶¼»á±»´Ëʼþ¼àÌýÆ÷´¦Àí.
Toolkit tk = Toolkit.getDefaultToolkit();
tk.addAWTEventListener(new MyAWTEventListener(), AWTEvent.KEY_EVENT_MASK);
class MyAWTEventListener implements AWTEventListener {
private boolean controlPressed = fal ......
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µ±ÎÒÃÇ˵µ½“Java”Õâ¸ö´ÊµÄʱºò£¬Ö¸µÄÊÇËĸöÏ໥¹ØÁªµÄ¸ÅÄJavaÓïÑÔ¡¢Java API¡¢Java ClassÎļþ¸ñʽ¡¢JavaÐéÄâ»ú¡£Õû¸öJavaÌåϵÊÇ»ùÓÚJava ÐéÄâ»ú¹¹ÔìµÄ£¬ÕýÒòΪÈç´Ë£¬²ÅÄÜʵÏÖJavaµÄ°²È«ÐÔºÍÍøÂçÒÆ¶¯ÐÔ¡£Java²¢·ÇÊǵÚÒ»¸ö²ÉÓÓÐéÄâ»ú”¸ÅÄîµÄÌåϵ£¬µ«È´ÊǵÚÒ»¸öµÃµ½¹ã·ºÔ ......
import java.util.Date;
class Dog{
private String name;
private Date birthday;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Date getBirthday() {
return b ......