É÷ÓÃJava×°ÏäÓë²ðÏä
ת×Ôhttp://xyiyy.javaeye.com/blog/358401
J2SE5.0ºóÌṩÁË×Ô¶¯×°ÏäÓë²ðÏäµÄ¹¦ÄÜ£¬´Ë¹¦ÄÜÊÂʵÉÏÊDZàÒëÆ÷À´°ïÄúµÄ棬±àÒëÆ÷ÔÚ±àÒëʱÆÚÒÀÄúËù±àдµÄ·½·¨£¬¾ö¶¨ÊÇ·ñ½øÐÐ×°Ïä»ò²ðÏ䶯×÷¡£ÀýÈ磺
Integer i = 100;
Ï൱ÓÚ±àÒëÆ÷ΪÄú×÷ÒÔϵÄÓï·¨±àÒ룺
Integer i = new Integer(100);
ËäÈ»´Ë¹¦Äܷܺ½±ã£¬µ«ÔÚ³ÌÐòÔËÐн׶ÎÄúµÃÁ˽âJavaµÄÓïÒå¡£ÈçÏÂÃæµÄ³ÌÐòÄܱàÒëͨ¹ý£º
Integer i = null;
int j = i;
´Ë³ÌÐò±àÒëʱͨ¹ý£¬µ«ÔËÐÐʱ»áÓдíÎó¡£ÒòΪÕâÖÖд·¨Ï൱ÓÚ£º
Integer i = null;
int j = i.intValue();
ÓÉÓÚiʵ¼ÊÉÏûÓвο¼ÖÁÈκεĶÔÏó£¬ËùÒÔ²»ÄܲÙ×÷intValue()·½·¨£¬ÉÏÃæ³ÌÐòÔËÐÐʱ»á³öÏÖNullPointerException´íÎó¡£
×Ô¶¯×°Ïä¡¢²ðÏäµÄ¹¦ÄÜÌṩÁË·½±ãÐÔ£¬µ«Òþ²ØÁËһϸ½Ú£¬ËùÒÔ±ØÐëСÐÄ¡£ÈçÏÂÁдúÂë1£º
public class AutoBoxDemo2
{
public static void main(String[] args)
{
Ïà¹ØÎĵµ£º
ÍøÉÏתÌùµÄJavaÕýÔòºÜÈÃÈËʧÍû£¬Ò»ÆªJavaScriptÕýÔò¼¯Â¼±»ºÜ¶à²»¸ºÔðÈεÄÈËתÀ´×ªÈ¥£¬²¢´òÉÏJavaÕýÔòµÄ±êÌ⣬º¹£¬ÕæÊÇÀÃÈËÒ»¶Ñ¡£
// urlÕýÔò
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegularExpressionTest {
public static void main(String[] args) {
Pa ......
import java.io.File;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.Iterator;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
public class ReadSetting {
......
1£©Java Language Specification, Third Edition (by James Gosling)
±¾ÊéÓÉJava¼¼ÊõµÄ·¢Ã÷Õß±àд£¬ÊÇJava TM±à³ÌÓïÑÔµÄȨÍþÐÔ¼¼ÊõÖ¸ÄÏ¡£Èç¹ûÄãÏëÖªµÀÓïÑÔÖ®¹¹ÔìµÄ¾«È·º¬Ò壬±¾ÊéÊÇ×îºÃµÄ×ÊÔ´¡£
&nbs ......
ʲôÊÇJavaÐéÄâ»ú
JavaÐéÄâ»ú£¨Java Virtual Machine) ¼ò³ÆJVM
¡¡¡¡JavaÐéÄâ»úÊÇÒ»¸öÏëÏóÖеĻúÆ÷,ÔÚʵ¼ÊµÄ¼ÆËã»úÉÏͨ¹ýÈí¼þÄ£ÄâÀ´ÊµÏÖ¡£JavaÐéÄâ»úÓÐ×Ô¼ºÏëÏóÖеÄÓ²¼þ,Èç´¦ÀíÆ÷¡¢¶ÑÕ»¡¢¼Ä´æÆ÷µÈ,»¹¾ßÓÐÏàÓ¦µÄÖ¸Áîϵͳ¡£
JavaÐéÄâ»úµÄÌØµã
¡¡¡¡JavaÓïÑÔµÄÒ»¸ö·Ç³£ÖØÒªµÄÌØµã¾ÍÊÇÓëÆ½Ì¨µÄÎÞ¹ØÐÔ¡£¶øÊ¹ÓÃJavaÐéÄâ»úÊÇÊµÏ ......
Ìá¸ßJAVAµÄÐÔÄÜ£¬Ò»°ã¿¼ÂÇÈçϵÄËĸöÖ÷Òª·½Ã棺
£¨1£© ³ÌÐòÉè¼ÆµÄ·½·¨ºÍģʽ
Ò»¸öÁ¼ºÃµÄÉè¼ÆÄÜÌá¸ß³ÌÐòµÄÐÔÄÜ£¬ÕâÒ»µã²»½öÊÊÓÃÓÚJAVA£¬Ò²ÊÊÓÃÒ²Èκεıà³ÌÓïÑÔ¡£ÒòΪËü³ä·ÖÀûÓÃÁ˸÷ÖÖ×ÊÔ´£¬ÈçÄڴ棬CPU,¸ßËÙ»º´æ£¬¶ÔÏó»º³å³Ø¼°¶àỊ̈߳¬´Ó¶øÉè¼Æ³ö¸ßÐÔÄܺͿÉÉìËõÐÔÇ¿µÄϵͳ¡£
µ±È»£¬ÎªÁËÌá¸ß³ÌÐòµÄÐÔÄܶø¸Ä±äÔÀ´µÄÉè¼ÆÊÇ ......