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

JavaỊ̈߳º¸ÅÄîÓëÔ­Àí

JavaỊ̈߳º¸ÅÄîÓëÔ­Àí
 
SCJP5ѧϰ±Ê¼Ç
 
Ò»¡¢²Ù×÷ϵͳÖÐÏ̺߳ͽø³ÌµÄ¸ÅÄî
ÏÖÔڵIJÙ×÷ϵͳÊǶàÈÎÎñ²Ù×÷ϵͳ¡£¶àÏß³ÌÊÇʵÏÖ¶àÈÎÎñµÄÒ»ÖÖ·½Ê½¡£
½ø³ÌÊÇÖ¸Ò»¸öÄÚ´æÖÐÔËÐеÄÓ¦ÓóÌÐò£¬Ã¿¸ö½ø³Ì¶¼ÓÐ×Ô¼º¶ÀÁ¢µÄÒ»¿éÄÚ´æ¿Õ¼ä£¬Ò»¸ö½ø³ÌÖпÉÒÔÆô¶¯¶à¸öÏ̡߳£±ÈÈçÔÚWindowsϵͳÖУ¬Ò»¸öÔËÐеÄexe¾ÍÊÇÒ»¸ö½ø³Ì¡£
 
Ïß³ÌÊÇÖ¸½ø³ÌÖеÄÒ»¸öÖ´ÐÐÁ÷³Ì£¬Ò»¸ö½ø³ÌÖпÉÒÔÔËÐжà¸öÏ̡߳£±ÈÈçjava.exe½ø³ÌÖпÉÒÔÔËÐкܶàÏ̡߳£Ïß³Ì×ÜÊÇÊôÓÚij¸ö½ø³Ì£¬½ø³ÌÖеĶà¸öÏ̹߳²Ïí½ø³ÌµÄÄÚ´æ¡£
 
“ͬʱ”Ö´ÐÐÊÇÈ˵ĸоõ£¬ÔÚÏß³ÌÖ®¼äʵ¼ÊÉÏÂÖ»»Ö´ÐС£
 
¶þ¡¢JavaÖеÄÏß³Ì
ÔÚJavaÖУ¬“Ïָ߳̔Á½¼þ²»Í¬µÄÊÂÇ飺
1¡¢java.lang.ThreadÀàµÄÒ»¸öʵÀý£»
2¡¢Ï̵߳ÄÖ´ÐС£
 
ʹÓÃjava.lang.ThreadÀà»òÕßjava.lang.Runnable½Ó¿Ú±àд´úÂëÀ´¶¨Ò塢ʵÀý»¯ºÍÆô¶¯ÐÂÏ̡߳£
 
Ò»¸öThreadÀàʵÀýÖ»ÊÇÒ»¸ö¶ÔÏó£¬ÏñJavaÖеÄÈÎºÎÆäËû¶ÔÏóÒ»Ñù£¬¾ßÓбäÁ¿ºÍ·½·¨£¬ÉúËÀÓÚ¶ÑÉÏ¡£
 
JavaÖУ¬Ã¿¸öÏ̶߳¼ÓÐÒ»¸öµ÷ÓÃÕ»£¬¼´Ê¹²»ÔÚ³ÌÐòÖд´½¨ÈκÎеÄỊ̈߳¬Ïß³ÌÒ²ÔÚºǫ́ÔËÐÐ×Å¡£
 
Ò»¸öJavaÓ¦ÓÃ×ÜÊÇ´Ómain()·½·¨¿ªÊ¼ÔËÐУ¬mian()·½·¨ÔËÐÐÔÚÒ»¸öÏß³ÌÄÚ£¬Ëü±»³ÆÎªÖ÷Ï̡߳£
 
Ò»µ©´´½¨Ò»¸öеÄỊ̈߳¬¾Í²úÉúÒ»¸öеĵ÷ÓÃÕ»¡£
 
Ïß³Ì×ÜÌå·ÖÁ½ÀࣺÓû§Ï̺߳ÍÊØºòÏ̡߳£
µ±ËùÓÐÓû§Ïß³ÌÖ´ÐÐÍê±ÏµÄʱºò£¬JVM×Ô¶¯¹Ø±Õ¡£µ«ÊÇÊØºòÏß³ÌÈ´²»¶ÀÁ¢ÓÚJVM£¬ÊغòÏß³ÌÒ»°ãÊÇÓɲÙ×÷ϵͳ»òÕßÓû§×Ô¼º´´½¨µÄ¡£


Ïà¹ØÎĵµ£º

java servlet ÂÒÂë

javaдÎļþÂÒÂë
StringBuffer sb = new StringBuffer();
  sb.append("<table  border=\"0\" width=\"100%\" cellpadding=\"0\" cellspacing=\"1\" bgcolor=\"b5d6e6\"");
  sb.append("<tr>");
  sb.append("<td bgcolor=\"#FFFFFE\" height=\"42\" colspan=\""+ (jsd ......

Java³ÌÐòÔ±µÄ֪ʶ¼Ü¹¹Ç³Îö

×÷ΪJava³ÌÐòÔ±À´Ëµ£¬×îÍ´¿àµÄÊÂÇéιýÓÚ¿ÉÒÔÑ¡ÔñµÄ·¶Î§Ì«¹ã£¬¿ÉÒÔ¶ÁµÄÊéÌ«¶à£¬ÍùÍùÈÝÒ×ÎÞËùÊÊ´Ó¡£ÎÒÏë¾ÍÎÒ×Ô¼º¶Á¹ýµÄ¼¼ÊõÊé¼®ÖÐÌôÑ¡³öÀ´Ò»Ð©£¬°´ÕÕѧϰµÄÏȺó˳Ðò£¬ÍƼö¸ø´ó¼Ò£¬ÌرðÊÇÄÇЩÏë²»¶ÏÌá¸ß×Ô¼º¼¼ÊõˮƽµÄJava³ÌÐòÔ±ÃÇ¡£
¡¡¡¡Ò»¡¢Java±à³ÌÈëÃÅÀà
¡¡¡¡¶ÔÓÚûÓÐJava±à³Ì¾­ÑéµÄJava³ÌÐòÔ±ÒªÈëÃÅ£¬Ëæ±ã¶ÁʲôÈëÃÅÊé ......

¹ØÓÚInitializing java tooling£¨1%£©

´ò¿ªeclipse£¬·¢ÏÖeclipseå´µôÁË£¬²¢ÇÒ³öÏÖÕâÑùµÄÌáʾ£º¹ØÓÚInitializing java tooling£¨1%£©...
ÖØÆôÁ˼¸´ÎÖ®ºó·¢ÏÖÎÊÌâÈÔÈ»´æÔÚ£¬Òò¶ø¿ñËÑÁËÒ»°Ñ£¬ÖÕÓÚÕÒµ½ÕýÈ·µÄ½â¾ö°ì·¨£¬ÈçÏ£º
ÕÒµ½eclipseĿ¼£¬±à¼­eclipse.iniÎļþ£¬ÔÚ-vmargs²ÎÊý֮ǰÌí¼ÓÉÏÈçϲÎÊý£¨Ò»¶¨ÒªÏñÏÂÃæÕâÑùд³ÉÁ½ÐУ©£¬È»ºóÖØÆô¾ÍokÁË
-vm
C:\Progr ......

JAVA³ÌÐòµÄÐÔÄܲâÊÔ·½·¨

Java 1.5ÒÔÉ϶¼ÔÚÐéÄâ»úÀïÄÚ½¨Á˳ÌÐòÐÔÄܸú×ٵŦÄÜ£¬²¢ÌṩÁËJava Profiling API£¬¼ò³ÆJPA£¬Äã¿ÉÒÔËÑË÷'java
profiling'¡£JavaÒ²ÌṩÁ˼òµ¥µÄÐÔÄÜÐÔÄܸú×Ù¹¤¾ßJConsole£¬ÄÜÏÔʾÄڴ棬Ï̵߳ÈʹÓÃ×´¿ö¡£ÁíÍâÒ²ÊÇÓÉSunÌṩ£¬µ«²»°üº¬ÔÚjdk
ÀïµÄ¹¤¾ßvisualgc¿ÉÒÔͼÐη½Ê½ÏÔʾÀ¬»øÊÕ¼¯µÄÔËÐÐÇé¿ö£¬ÎªÐÔÄÜ·ÖÎöÌṩ֧³Ö¡£µÚÈý· ......

javaÖÐ== ÓëequalsµÄÇø±ð

public class test1
{
 public static void main(String[] args){
  //== ÓëequalsµÄÇø±ð
  //1.nullµÄ±È½Ï£ºÖ»ÄÜÓÃ==
  System.out.println("1.nullµÄ±È½Ï£ºÖ»ÄÜÓÃ==");
  Object o1=null,o2=null;
  System.out.println(null==null&&o1==null& ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ