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javaÖÐPropertiesÀàµÄʹÓÃ

ÔÚjava.util °üÏÂÃæÓÐÒ»¸öÀà Properties£¬¸ÃÀàÖ÷ÒªÓÃÓÚ¶ÁÈ¡ÒÔÏîÄ¿µÄÅäÖÃÎļþ£¨ÒÔ£®properties½áβµÄÎļþºÍxmlÎļþ£©¡£
PropertiesµÄ¹¹Ô캯ÊýÓÐÁ½¸ö£¬Ò»¸ö²»´ø²ÎÊý£¬Ò»¸öʹÓÃÒ»¸öProperties¶ÔÏó×÷Ϊ²ÎÊý¡£
ʹÓÃProperties¶ÁÈ¡£®propertiesÎļþ
test.propertiesÎļþÈçÏ£º
#²âÊÔ»·¾³ÅäÖãºÆ½Ì¨Â·¾¶ÅäÖÃ
jstrd_home=D:/TMS2006/webapp/tms2006/WEB-INF/
dbPort = localhost
databaseName = mydb
dbUserName = root
dbPassword = root
# ÒÔÏÂΪÊý¾Ý¿â±íÐÅÏ¢
dbTable = mytable
# ÒÔÏÂΪ·þÎñÆ÷ÐÅÏ¢
ip = 192.168.0.9
¶ÁÈ¡test.propertiesµÄ·½·¨ÈçÏ£º
impor java.io.*;
import java.util.*;
public class ReadProperties
{
public static void main(String[] args) {
File pFile = new File("e:\\test.properties");    // propertiesÎļþ·ÅÔÚeÅÌÏ£¨windows£©
              FileInputStream   pInStream=null;
          try {
           &n ......

java ÑéÖ¤Éí·ÝÖ¤ Éí·ÝÖ¤javaÑéÖ¤

ÒýÓÃÓÚ£ºhttp://blog.csdn.net/hhzxj2008/archive/2010/01/10/5171444.aspx
public static boolean validatePersonalId(String personalId) {

if ((personalId == null) || ((personalId.length() != 15) &&
(personalId.length() != 18))) {
return false;
}

int personalIdLength = personalId.length();
String regex = "[1-8]{1}[0-9]{" + (personalIdLength-2) + "}[0-9X]";
Pattern pattern = Pattern.compile(regex);
if (!pattern.matcher(personalId).matches()) {
return false;
}
// ½«ÀÏÉí·Ý֤ת»»ÎªÐÂÉí·ÝÖ¤
if (personalIdLength == 15) {
StringBuffer stringBuffer = new StringBuffer(personalId);
stringBuffer.insert(6, "19");
personalId = stringBuffer.toString();
}

// ¹æÔò

byte[] poss = { 2, 4, 8, 5, 10, 9, 7, 3, 6, 1, 2, 4, 8, ......

Java Éí·ÝÖ¤ÑéÖ¤

ÕâÊÇÒ»¸öûÓÐÑéÖ¤ÐÐÕþÇø´úÂëµÄ£¬ËùÒÔÕâ¸ö²»ËãÍêÈ«£¬µ«ÊÇÎÒÃÇÔÚ×öʵ¼ÊÓ¦ÓÃʱ¿ÉÒÔ¼ÓÉÏ£¬ÕâÀïÎÒû¼Ó¡£
Ô´ÂëÈçϽö¹©²Î¿¼.
package ibees.validator;
import java.util.regex.Pattern;
/**
* ³£ÓõÄÑéÖ¤,source charset utf-8
*
* @author hhzxj2008
* */
public class CommonValidator {
public static boolean validatePersonalId(String personalId) {
if ((personalId == null) || ((personalId.length() != 15) &&
(personalId.length() != 18))) {
return false;
}
int personalIdLength = personalId.length();
String regex = "[1-8]{1}[0-9]{" + (personalIdLength-2) + "}[0-9X]";
Pattern pattern = Pattern.compile(regex);
if (!pattern.matcher(personalId).matches()) {
return false;
}
// ½«ÀÏÉí·Ý֤ת»»ÎªÐÂÉí·ÝÖ¤
if (personalIdLength == 15) {
StringBuffer stringBuffer = new StringBuffer(personalId);
stringBuffer.insert(6, "19");
personalId = stringBuffer.toString();
}
// ¹æÔò
byte[] poss = { 2, 4, 8, 5, 10, 9, 7, 3, 6, 1, 2, 4, 8, 5, 10, 9, 7 }; ......

JavaµÄһЩ»ù±¾ÖªÊ¶

Ò». Êý×é
  . ÕýÈ·µÄ¶¨Òå: int num[];   num= new int[5]       //Ö»ÓÐÓÃnew¹Ø¼ü×ÖÕæÕý´´½¨Êý×éʱ²Å¿ÉÒÔ¸ø¶¨ËüµÄ´óС
    ´íÎóµÄ¶¨Òå: int num[5];
  . ³£¼ûµÄÊý×é´íÎóΪ : ArrayIndexOutOfBoundsException  (Êý×éÔ½½ç´íÎó)
  . Êý×éµÄά¶ÈÓà .length;  ×Ö·û´®³¤¶ÈÓà .length();
  . ÕýÈ·µÄ³õʼ»¯: int[] num={1,2,3}; ÓÖ»òÕß: int num[]= new int[]{1,2,3}
    ´íÎóµÄ³õʼ»¯: int[] num=new int[3]{1,2,3};
  . ²»ÄܸıäJavaÊý×éµÄ´óС.
¶þ. Àà
  . JavaÖ»ÔÊÐíµ¥¼Ì³Ð,ËùÒÔÔö¼ÓÁ˽ӿÚÌØÐÔ.
  . ËùÓÐJavaÀà¶¼ÊÇObjectÀàµÄºó´ú,Èç¹ûÒ»¸öÀàûÓÐextend¹Ø¼ü×Ö,Õâ¸öÀཫÊÇ»ùÀàOjbectÅÉÉúµÄ.
  . Ò»¸öÎļþÖ»ÄÜÓÐÒ»¸öÍⲿÀà¿ÉÒÔÉùÃ÷Ϊpublic, Èç¹ûÄãÔÚÒ»¸öÎļþÖж¨Òå¶àÓÚÒ»¸öpublicÍⲿÀà,½«»á·¢Éú±àÒë´íÎó
  . JavaÑϸñÇø·Ö´óСд.
  . Ò»¸öÍⲿÀàÖ»ÔÊÐíÉùÃ÷Ϊpublic, abstact , final.
  . System.out.print ÊÇstatic·½·¨, ²»ÐèÒªnew´´½¨.
  . Static·½·¨Ö»ÄÜ·ÃÎÊStatic±äÁ¿
  . Ò»¸ö·½·¨±äÁ¿½«"ÆÁ±Î&quo ......

javaʵÏÖ´ò×Ö»úЧ¹ûµÄ³ÌÐò

import java.applet.*;
import java.awt.*;
import java.io.*;
import java.net.URL;
import java.util.*;
public class Typewriter4 extends Applet implements Runnable
{
    AudioClip hit, cr, ding ;
    boolean alreadyRun = false,
            soundOn = false,
            loop = false;
    Color bgColor = Color.lightGray,
          textColor = Color.black ;
    Font font ;
    Image offScreen, background ;
    int width, height,
        currentline = 0,
        currentword = 0,
        currentletter = 0,
        depth = 0,
        margin = 0,
    ......
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