·ÖÏíJavaÃæÊÔÖÐÓöµ½µÄһЩ¾µäËã·¨ÌâÄ¿
1.дһ¸ö·½·¨£¬ÓÃÒ»¸öforÑ»·´òÓ¡¾Å¾Å³Ë·¨±í
/**
* ´òÓ¡¾Å¾Å³Ë·¨¿Ú¾÷±í
*/
public void nineNineMulitTable(){
for (int i = 1,j = 1; j <= 9; i++) {
System.out.print(i+"*"+j+"="+i*j+" ");
if(i==j){
i=0;
j++;
System.out.println();
}
}
}
2.¸ø¶¨Ò»¸öjava.util.Date¶ÔÏó£¬ÈçºÎת»¯Îª”2007-3-22 20:23:22”¸ñʽµÄ×Ö·û´®
/**
* ½«Ä³¸öÈÕÆÚÒԹ̶¨¸ñʽת»¯³É×Ö·û´®
* @param date
* @return str
*/
public String date2FormatStr(Date date)
{
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String str = sdf.format(date);
return str;
}
3.дһ¸ö·½·¨£¬Äܹ»ÅжÏÈÎÒâÒ»¸öÕûÊýÊÇ·ñËØÊý
/**
* ÅжÏÈÎÒâÒ»¸öÕûÊýÊÇ·ñËØÊý
* @param num
* @return boolean
*/
public boolean isPrimeNumber(int num)
{
for (int i = 2; i <= Math.sqrt(num); i++) {
if(num%i==0)
{
return false;
}
}
return true;
}
4.дһ¸ö·½·¨£¬ÊäÈëÈÎÒâÒ»¸öÕûÊý£¬·µ»ØËüµÄ½×³Ë
/**
*»ñµÃÈÎÒâÒ»¸öÕûÊýµÄ½×³Ë
*@param n
*@returnn!
*/
public int factorial(int num)
{
//µÝ¹é
if(num == 1)
{
return 1;
}
return num*factorial(num-1);
}
5.дһ¸ö·½·¨£¬Óöþ·Ö²éÕÒ·¨ÅжÏÈÎÒâÕûÊýÔÚÈÎÒâÕûÊýÊý×éÀïÃæÊÇ·ñ´æÔÚ£¬Èô´æÔھͷµ»ØËüÔÚÊý×éÖеÄË÷ÒýλÖ㬲»´æÔÚ·µ»Ø-1
/**
*¶þ·Ö²éÕÒÌØ¶¨ÕûÊýÔÚÕûÐÍÊý×éÖеÄλÖÃ(µÝ¹é)
*@param dataset
*@param data
*@param beginIndex
*@param endIndex
*@return index
*/
public int binarySearch(int[] dataset,int data,int beginIndex,int endIndex){
int midIndex = (beginIndex+endIndex)/2;
//Èç¹û²éÕÒµÄÊýÒª±È¿ªÊ¼Ë÷ÒýµÄÊý¾ÝҪС»òÕßÊDZȽ
Ïà¹ØÎĵµ£º
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;
public class DealFile {
/**
* ɾ³ýÎļþ
......
ÌÔ±¦ÓÿªÔ´£¬Î¢ÈíÓÃ×Ô¼ºµÄ¶«Î÷£¬½ðɽʲô¶¼Óã¬Google¡¢IBMºÍORACLEÒÔ¼°JBOSSÔòÈ«Á¦Ö§³ÖOpenSource£¬Öî¶à¹«Ë¾£¬ÎÒÒ²²»Ï¸ÆÀ
ÁË£¬´Ó×îÖÕ²úÆ·ÔËÐÐЧÂÊ¿´£¬Î¢Èí×î²î£¬Windows
LiveϵÁеIJúÆ·ÂýµÄ²»³ÉÑù£¨×î½ü¼¸¸öÔ²ÅÂÔÓиĹۣ©£¬·´µ¹ÊÇÓÿªÔ´µÄÒ»¸ö±ÈÒ»¸ö¿ì£»¿´¿´googleºÍÌÔ±¦¡£ËùÒÔ˵£¬Ã»ÓÐʲô¿ìÂý£¬Ö» ......
HTTP(Hyper-Text Transfer Protocol)Êǵ±Ç°ÒòÌØÍøÉÏʹÓÃ×î¶àµÄÐÒé¡£ÍøÂç·þÎñ£¬ÍøÂçÉ豸ÒÔ¼°ÍøÂç¼ÆËãµÄÔö³¤²»½öÔö¼ÓÁËÐèÒªHTTPÖ§³ÖµÄµÄÓ¦ÓóÌÐò£¬»¹À©Õ¹ÁËHTTPµÄ½ÇÉ«£¬Ê¹Æä²»½ö½öÓ¦ÓÃÓÚÓû§Çý¶¯µÄwebä¯ÀÀÆ÷¡£ java.net°üÌṩͨ¹ýHTTP·ÃÎÊ×ÊÔ´µÄ»ù±¾¹¦ÄÜ¡£HttpClientÉ跨ͨ¹ýʵÏÖÒ»¸ö¸ßЧµÄ£¬×îÐµģ¬¹¦ÄܷḻµÄHttp¿Í»§¶ËÀ ......
java»ù´¡¼¼Êõ֪ʶ¸´Ï°
Ò»¡¢ ¼ÆËã»ú»ù´¡ÖªÊ¶£º°üÀ¨Êý¾Ý½á¹¹ÖеĻù±¾Ëã·¨£¬¼ÆËã»úÍøÂçµÄOSI£¬TCP/IPÄ£ÐÍ¡£
¼ÆËã»úÍøÂçµÄOSI£ºOSI(Open System Interconnnection OSI)¿ª·Åʽϵͳ»¥Á¬£¬ ÊÇÓɹú¼Ê»¯±ê×¼×éÖ¯£¨ISO£©Öƶ¨µÄ±ê×¼»¯¿ª·ÅʽµÄ¼ÆËã»úÍøÂç²ã´Î½á¹¹Ä£ÐÍ ......
//ÕâÊÇÎҵĶ¨Ê±Æ÷À࣬ÓÃÀ´¶¨Ê±Ö´ÐÐij¶ÎÈÎÎñ£»
package com.my.time;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Timer;
public
class
BugXmlTimer {
public
......