JavaÖмÆÊ±Æ÷µÄʹÓÃ
import java.util.Timer;
import java.util.TimerTask;
public class TimerExample
{
/**
* JavaÖмÆÊ±Æ÷µÄʹÓÃ
* Time: 21:19 2010-1-5
*/
Timer localTimer;
public TimerExample(int seconds)
{
// Create local timer
localTimer = new Timer();
// Create local timer task and set the timer-parameter
localTimer.schedule(new LocalTimerTask(), 0, seconds * 1000);
}
class LocalTimerTask extends TimerTask
{
int bitTest = 0xFFFFFFFF;
int flag = 1;
int temp = bitTest;
// Override the abstract method of TimerTask
// The run() will be called every per timer
public void run()
{
if (temp < 0)
{
System.out.println(Integer.toBinaryString(temp));
temp = bitTest & (~flag);
flag <<= 1;
}
Ïà¹ØÎĵµ£º
ÒÔǰÓùý¼¸´ÎÕâ¸ö¶«¶«£¬µ«Ã¿´Î¶¼ÖØÐ²éѯһ´Î¡£±¾ÎÄÔʼ³ö´¦ÊÇÕâÀï
¡£
£££££££££££££££££££££££££££££££££££££££££££££££££££££££££££
Keytool
ÊÇÒ»¸öJava
Êý¾ÝÖ¤ÊéµÄ¹ÜÀí¹¤¾ß
,Keytool
½«ÃÜÔ¿£¨key£©ºÍÖ¤Ê飨certificates£©´æÔÚÒ»¸ö³ÆÎªkeystoreµÄÎļþ ......
File.separatorChar ·µ»ØÒ»¸ö×Ö·û£¬±íʾµ±Ç°ÏµÍ³Ä¬ÈϵÄÎļþÃû·Ö¸ô·û£¬ÔÚWindowsÖÐΪ"\",unixÖÐΪ"/"¡£
File.separator ÓëǰÕßÏàͬ£¬µ«½«·Ö¸ô·û×÷Ϊ×Ö·û´®ÀàÐÍ·µ»Ø¡£
pathSeparatorChar ·µ»ØÒ»¸ö×Ö·û£¬±íʾµ±Ç°ÏµÍ³Ä¬ÈϵÄ·¾¶Ãû·Ö¸ô·û£¬ÔÚWindowsÖÐΪ";",unixÖÐΪ":"¡£
File.pathSeparator ÓëǰÕßÏàͬ£¬µ«½«·Ö¸ô·û×÷Ϊ×Ö· ......
import java.net.InetAddress;
//±¾³ÌÐòʵÏÖÁË»ñÈ¡±¾µØIPµØÖ·
public class IP {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
InetAddress localHost;
InetAddress []ip;
try{
localHost=InetAddress.getLocalHost();
ip=InetAddr ......
¹ÜÀí Java Àà·¾¶£¨UNIX ºÍ Mac OS X£©
꿅᣼ http://www.ibm.com/developerworks/cn/java/j-classpath-unix/
×÷ÕßµÄÍøÕ¾£ºhttp://www.cafeaulait.org/
×ܽ᣺
²»¹ÜÀà·¾¶Óжàô¼¬ÊÖ£¬Äú¶¼¿ÉÒÔͨ¹ýһЩ¼òµ¥µÄ¹æÔò¶ÔËü¼ÓÒÔ¹ÜÖÆ£¬ÓÈÆäÊÇÒª¼ÇסÈçϵÄһЩÔÔò£º
½«Àà·Åµ½°üÖС£
Ñϸñ×ñÊØ°üºÍÀàµÄÃüÃûÔ¼¶¨ ......
1.[http://www.javaalmanac.com] – Java¿ª·¢ÕßÄê¼øÒ»ÊéµÄÔÚÏß°æ±¾. ÒªÏë¿ìËٲ鵽ijÖÖJava¼¼ÇɵÄÓ÷¨¼°Ê¾Àý´úÂë, ÕâÊÇÒ»¸ö²»´íµÄÈ¥´¦.
2.[http://www.onjava.com] – O’ReillyµÄJavaÍøÕ¾. ÿÖܶ¼ÓÐÐÂÎÄÕÂ.
3.[http://java.sun.com] – ¹Ù·½µÄJava¿ª·¢ÕßÍøÕ¾ – ÿÖܶ¼ÓÐÐÂÎÄÕ·¢±í.
4.[http ......