Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

JAVA³£ÓòÙ×÷Óï¾ä ÏîÄ¿ÖеÄ×ܽáÎå


Êý×ֵĸñʽ»¯
DecimalFormat df = new DecimalFormat(",###.00");  
double aNumber = 33665448856.6568975; 
String result = df.format(aNumber);  
Sytem. out.println(result);

Êä³ö½á¹ûΪ£º
33,665,448,856.66 
·ÖÎö×Ö·û´® 
StringTokenizer(String s) ¹¹ÔìÒ»¸ö·ÖÎöÆ÷£¬Ê¹ÓÃĬÈÏ·Ö¸ô×Ö·û£¨¿Õ¸ñ£¬»»ÐУ¬»Ø³µ£¬Tab£¬½øÖ½·û£© 
StringTokenizer(String s,String delim) delimÊÇ×Ô¼º¶¨ÒåµÄ·Ö¸ô·û 
nextToken() Öð¸ö»ñÈ¡×Ö·û´®ÖеÄÓïÑÔ·ûºÅ 
boolean hasMoreTokens() Ö»Òª×Ö·û´®»¹ÓÐÓïÑÔ·ûºÅ½«·µ»Øtrue£¬·ñÔò·µ»Øfalse 
countTokens() µÃµ½Ò»¹²ÓжàÉÙ¸öÓïÑÔ·ûºÅ
Êý×éµÄÑ¡ÔñÅÅÐò
public void ListNum(int[] a){  
  for(int k=0;k<a.length-1;k++){
  int j=k;  
  int mini=a[k];
  for(int i=k+1;i<a.length;i++){  
  if(a[k]>a[i]){
  a[k]=a[i];  
  j=i;
  }  
  }
  a[j]=mini;  
  }  
}
MD5ºÍÒ»¸ö¿ÉÄæ¼ÓÃÜËã·¨Ïà½ÓºÏµÄ¼ÓÃܺͽâÃܳÌÐò
import java.security.MessageDigest;
/**
*ÏÈͨ¹ýMD5¼ÓÃÜÖ®ºó£¬ÔÙÀ´Ò»´Î¿ÉÄæµÄ¼ÓÃÜ¡£
*˳Ðò¿ÉÒÔµ÷Õû£¬¿ÉÒÔÑ¡ÔñÏÈÓÿÉÄæ¼ÓÃÜ£¬È»ºóÔÙÓÃMD5¼ÓÃÜ
*/
public class MD5andKL{
//MD5¼ÓÂë¡£32λ
public static String MD5(String inStr) {
MessageDigest md5 = null;
try {
md5 = MessageDigest.getInstance("MD5");
} catch (Exception e) {
System.out.println(e.toString());
e.printStackTrace();
return "";
}
char[] charArray = inStr.toCharArray();
byte[] byteArray = new byte[charArray.length];

for (int i = 0; i < charArray.length; i++)
byteArray[i] = (byte) charArray[i];

byte[] md5Bytes = md5.digest(byteArray);

StringBuffer hexValue = new StringBuffer();



Ïà¹ØÎĵµ£º

android ÖÐjava±à³ÌµÄÒâÍâʼþ´¦Àí

     ²»¹ÜÄãÐŲ»ÐÅ£¬¼´Ê¹¶àôÊìÁ·±à³ÌµÄÈËÔ±ÔÚcodingµÄʱºò¶¼»á³öÏÖÒâÏë²»µ½µÄbug¡£ÔÚÉÏÆªÎÄÕÂÖÐÎÒÔøÌáµ½£¬bugµÄÔì³ÉÊǶà¸ö·½ÃæµÄ×ۺϽá¹û£¬ÓÐЩbugÊÇ¿ÉÒÔÐÞ¸´µÄ£¬µ«ÊÇÓÐЩÂß¼­ÉϵÄbugÒªÐÞ¸´¿É²»ÊÇÄÇôÈÝÒ×µÄÊÂÇ飬¾ÍÏñÎÒÃÇ×ö´íÁËÒ»¼þÊÂÇ飬Èç¹û²»È¥´Ó¸ù±¾ÉϸÄÕý¾Í»á·¸¸ü´óµÄ´íÎóÒ»Ñù£¬ÓÐʱºòbugÒ²ÊÇÒ»¸ö»ýÀ ......

JavaµÄ´úÀíģʽÀý×Ó

(1).  ´´½¨Ò»¸ö½Ó¿Ú, Òª´úÀíµÄÀàºÍ ´úÀíÀà¶¼½«¼Ì³ÐËü
package stone;
public interface Image {
    public void show();
}
(2). ´´½¨Òª±»´úÀíµÄÀà:
package stone;
public class BigImage implements Image {
    public BigImage() {
        ......

JAVA »ñÈ¡±¾ÖܵįðʼÈÕÆÚ troy

import java.text.DateFormat;
import java.util.Calendar;
import java.util.Date;
/**
 * @author troy(J2EE)
 * @version 1.0
 */
public class Test {
 public static void main(String[] args) throws Exception {
  DateFormat df = DateFormat.getDateInstance();
 &n ......

REST¼Ü¹¹ÓëJavaʵÏÖ1——REST¸ÅÄî

ÓÉÓÚÓиöºÏ×÷ÏîÄ¿£¬Óõ½ÁËREST£¬ÎÒÃÇÕâ±ßµÄ·þÎñÆ÷ÊÇjavaµÄ£¬ºÏ×÷·½ÄDZßÖ÷ÒªÊÇPHP»·¾³£¬ÎªÁËÔ¶³Ìµ÷ÓõÄÎÊÌ⣬ʹÓÃÁËREST×÷ΪAPIµÄʵÏÖ·½
°¸¡£ÏÖÔÚÏîÄ¿×öµÃ²î²»¶àÁË£¬ÏÂÃæ¼ÇÏÂ×Ô¼ºµÄÒ»µãÐĵã¬ËãÊDZʼǰɡ£
    REST£¨Representational State Transfer£©µÄ˵·¨À´×Ô“Architectural Styles and the Desi ......

Java²Ù×÷XMLÎļþ dom4j ƪ£¨×ªÔØ£©


ÔÚÏîÄ¿ÖУ¬ÎÒÃǺܶ඼Óõ½ÁËxmlÎļþ£¬ÎÞÂÛÊDzÎÊýÅäÖû¹ÊÇÓëÆäËüϵͳµÄÊý¾Ý½»»¥¡£
½ñÌì¾ÍÀ´½²Ò»ÏÂJava ÖÐʹÓÃdom4jÀ´²Ù×÷XMLÎļþ¡£
ÎÒÃÇÐèÒªÒýÈëµÄ°ü£º
//Îļþ°ü
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileWriter;
//¹¤¾ß°ü
import java.util.Ite ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ