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

»ñÈ¡ÆÕͨJava¶ÔÏó´óС

»º´æ¶ÔÏóÐèÒªÖªµÀ¶ÔÏóÕ¼ÓÿռäµÄ´óС,¿ÉÒÔÊÂÏÈÉèÖúÃÿÖÖÀàÐ͵ĴóС,´Ë·½·¨¶ÔÆÕͨµÄ¶ÔÏóÆðЧ,JiveÂÛ̳ÖеĶÔÏóÒ²ÊDzÉÓÃÕâÖÖ°ì·¨À´»ñÈ¡¶ÔÏóµÄ´óСµÄ(È¡×ÔJive).
public class CacheSizes {
/**
* Returns the size in bytes of a basic Object. This method should only
* be used for actual Object objects and not classes that extend Object.
*
* @return the size of an Object.
*/
public static int sizeOfObject() {
return 4;
}
/**
* Returns the size in bytes of a String.
*
* @param string the String to determine the size of.
* @return the size of a String.
*/
public static int sizeOfString(String string) {
if (string == null) {
return 0;
}
return 4 + string.length()*2;
}
/**
* Returns the size in bytes of a primitive int.
*
* @return the size of a primitive int.
*/
public static int sizeOfInt() {
return 4;
}
/**
* Returns the size in bytes of a primitive char.
*
* @return the size of a primitive char.
*/
public static int sizeOfChar() {
return 2;
}
/**
* Returns the size in bytes of a primitive boolean.
*
* @return the size of a primitive boolean.
*/
public static int sizeOfBoolean() {
return 1;
}
/**
* Returns the size in bytes of a primitive long.
*
* @return the size of a primitive long.
*/
public static int sizeOfLong() {
return 8;
}
/**
* Returns the size in bytes of a primitive double.
*
* @return the size of a primitive double.
*/
public static int sizeOfDouble() {
return 8;
}
/**
* Returns the size in bytes of a Date.
*
* @return the size of a Date.
*/
public static int sizeOfDate() {
return 12;
}
/**
* Returns the size in bytes of a Properties object


Ïà¹ØÎĵµ£º

javaʹÓÃrocksawºÍvserv tcpipʵÏÖ»ùÓÚICMPµÄPing¹¦ÄÜ

Ò»£º×¼±¸ www.savarese.org download
 1.  rocksaw-1.0.0-src.tar.gz
 2.  vserv-tcpip-0.9.2-src.tar.gz
¶þ£º±àÒëÔ´ÎļþµÃµ½jar°ü ʹÓÃAnt
 1.  build vserv-tcpip-0.9.2-src
      ÔÚvserv-tcpip-0.9.2Ŀ¼ÏÂÃæ½¨Ò»¸ötestsĿ¼£¬È»ºóÔÚcmd´°¿ÚϽøÈë ......

Java Êý¾ÝÁ÷2(PipedInputStream,PipedOutputStream)

Java Êý¾ÝÁ÷2(PipedInputStream,PipedOutputStream...)
2007-08-18 17:30
×Ö½ÚÁ÷µÄ¸ß¼¶Ó¦ÓÃ
?       ¹ÜµÀÁ÷
¹ÜµÀÓÃÀ´°ÑÒ»¸ö³ÌÐò¡¢Ï̺߳ʹúÂë¿éµÄÊä³öÁ¬½Óµ½ÁíÒ»¸ö³ÌÐò¡¢Ï̺߳ʹúÂë¿éµÄÊäÈë¡£java.ioÖÐÌṩÁËÀàPipedInputStreamºÍPipedOutputStream×÷Ϊ¹ÜµÀµÄÊäÈë/Êä³öÁ÷
¹ÜµÀÊäÈëÁ÷×÷ ......

Java¶ÔÏóÐòÁл¯ºÍ·´ÐòÁл¯

µ±Á½¸ö½ø³ÌÔÚ½øÐÐÔ¶³ÌͨÐÅʱ£¬±Ë´Ë¿ÉÒÔ·¢Ë͸÷ÖÖÀàÐ͵ÄÊý¾Ý¡£ÎÞÂÛÊǺÎÖÖÀàÐ͵ÄÊý¾Ý£¬¶¼»áÒÔ¶þ½øÖÆÐòÁеÄÐÎʽÔÚÍøÂçÉÏ´«ËÍ¡£·¢ËÍ·½ÐèÒª°ÑÕâ¸öJava¶ÔÏóת»»Îª×Ö½ÚÐòÁУ¬¼´Java¶ÔÏóÐòÁкţ¬²ÅÄÜÔÚÍøÂçÉÏ´«ËÍ£»½ÓÊÕ·½ÔòÐèÒª°Ñ×Ö½ÚÐòÁÐÔÙ»Ö¸´ÎªJava¶ÔÏ󣬼´·´ÐòÁл¯¡£
°ÑJava¶ÔÏóת»»Îª×Ö½ÚÐòÁеĹý³Ì³ÆÎª¶ÔÏóµÄÐòÁл¯¡£
°Ñ×Ö½ ......

ÈÏʶÀí½âJavaÖÐnative·½·¨

Java²»ÊÇÍêÃÀµÄ£¬JavaµÄ²»×ã³ýÁËÌåÏÖÔÚÔËÐÐËÙ¶ÈÉÏÒª±È´«Í³µÄC++ÂýÐí¶àÖ®Í⣬JavaÎÞ·¨Ö±½Ó·ÃÎʵ½²Ù×÷ϵͳµ×²ã£¨ÈçϵͳӲ¼þµÈ)£¬Îª´ËJavaʹÓÃnative·½·¨À´À©Õ¹Java³ÌÐòµÄ¹¦ÄÜ¡£
¡¡¡¡¿ÉÒÔ½«native·½·¨±È×÷Java³ÌÐòͬ£Ã³ÌÐòµÄ½Ó¿Ú£¬ÆäʵÏÖ²½Ö裺
¡¡¡¡£±¡¢ÔÚJavaÖÐÉùÃ÷native()·½·¨£¬È»ºó±àÒ룻
¡¡¡¡£²¡¢ÓÃjavah²úÉúÒ»¸ö.h ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ