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

javaÈÕÆÚ´¦ÀíSystem£¨1£©

È¡µÃµ±Ç°ÏµÍ³Ê±¼ä   System.currentTimeMillis()
·µ»ØºÁÃëʱ¼ä£¬ÎªlongÐÍÕûÊý£¬
¸Ãº¯ÊýÔÚ½øÐÐϵͳÐÔÄÜ¼à¿ØÊ±×î³£Óõ½
Àý£º
  long start = System.currentTimeMillis();
  //Òª¼à¿ØµÄ´úÂë¶Î
  long end = System.currentTimeMillis();
  System.out.println(end-start);
ÓÐʱҪ¼à¿ØµÄ´úÂë·Ö²¼ÔÚ¸÷¸öÀàÖУ¬¿ÉÒÔ
System.out.println("µ±Ç°Î»ÖÃXX"+System.currentTimeMillis());
¿ÉÒÔ¿´³öÔÚÄÄЩ´úÂëÖ´ÐеÄʱ¿ÌÊǶàÉÙ£¬¾Í¿ÉÒԾݴ˷ÖÎö³öÄÄÒ»¶Î´úÂëÖ´ÐеÄʱ¼ä³¤£¬´Ó¶ø·ÖÎöϵͳÐÔÄܵį¿¾±ËùÔÚ


Ïà¹ØÎĵµ£º

JAVA´úÂëÓÅ»¯

ͨ¹ýʹÓÃһЩ¸¨ÖúÐÔ¹¤¾ßÀ´ÕÒµ½³ÌÐòÖÐµÄÆ¿¾±£¬È»ºó¾Í¿ÉÒÔ¶ÔÆ¿¾±²¿·ÖµÄ´úÂë½øÐÐÓÅ»¯¡£Ò»°ãÓÐÁ½ÖÖ·½°¸£º¼´ÓÅ»¯´úÂë»ò¸ü¸ÄÉè¼Æ·½·¨¡£ÎÒÃÇÒ»°ã»áÑ¡ÔñºóÕߣ¬ÒòΪ²»È¥µ÷ÓÃÒÔÏ´úÂëÒª±Èµ÷ÓÃһЩÓÅ»¯µÄ´úÂë¸üÄÜÌá¸ß³ÌÐòµÄÐÔÄÜ¡£¶øÒ»¸öÉè¼ÆÁ¼ºÃµÄ³ÌÐòÄܹ»¾«¼ò´úÂ룬´Ó¶øÌá¸ßÐÔÄÜ¡£
ÏÂÃæ½«ÌṩһЩÔÚJAVA³ÌÐòµÄÉè¼ÆºÍ±àÂëÖУ¬ÎªÁËÄܹ» ......

ʹÓÃjavaÖÐµÄ synchronized½øÐÐÏß³Ìͬ²½

ÔÚjava±à³Ì˼ÏëÖжÔsynchronizedµÄÒ»µã½âÊÍ:
1¡¢synchronized¹Ø¼ü×ÖµÄ×÷ÓÃÓòÓжþÖÖ£º
1£©ÊÇij¸ö¶ÔÏóʵÀýÄÚ£¬synchronized aMethod(){}¿ÉÒÔ·ÀÖ¹¶à¸öÏß³Ìͬʱ·ÃÎÊÕâ¸ö¶ÔÏóµÄsynchronized·½·¨£¨Èç¹ûÒ»¸ö¶ÔÏóÓжà¸ösynchronized·½·¨£¬Ö»ÒªÒ»¸öÏ̷߳ÃÎÊÁËÆäÖеÄÒ»¸ösynchronized·½·¨£¬ÆäËüÏ̲߳»ÄÜͬʱ·ÃÎÊÕâ¸ö¶ÔÏóÖÐÈκÎÒ»¸ö ......

JavaÃæÊÔÌâÿÈÕÎåÌâ(2010/02/26)


ÎÊÌâ1.
public static void append(String str){
str += " Append!";
}
public static void append(StringBuffer sBuffer){
sBuffer.append(" Append!");
}
public void test(){
String str = "Nothing";
append(str);
System.out.println(str);
StringBuffer sBuffer = new StringBuffer("Nothing" ......

AndroidС֪ʶһ: ´ÓÃüÁîÐÐÆô¶¯JavaÓ¦ÓÃ&Ôö¼ÓJavaÓ¦ÓÃ


1.              
Ôö¼ÓJavaÓ¦ÓÃ
ÔÚandroid_2.1/packages/appsÔö¼Ó¸ÃÏîÄ¿£»
ÔÚbuild/target/product/generic.mkµÄPRODUCT_PACKAGESºóÃæÔö¼Ó¶ÔÓ¦°üµÄÃû×Ö¡£
 
1.1          
´ÓÃüÁîÐ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ