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

java SystemµÄÊôÐÔ²ÎÊý´óÈ«

Properties props=System.getProperties(); //ϵͳÊôÐÔ  
   System.out.println("JavaµÄÔËÐл·¾³°æ±¾£º"+props.getProperty("java.version"));  
   System.out.println("JavaµÄÔËÐл·¾³¹©Ó¦ÉÌ£º"+props.getProperty("java.vendor"));  
   System.out.println("Java¹©Ó¦É̵ÄURL£º"+props.getProperty("java.vendor.url"));  
   System.out.println("JavaµÄ°²×°Â·¾¶£º"+props.getProperty("java.home"));  
   System.out.println("JavaµÄÐéÄâ»ú¹æ·¶°æ±¾£º"+props.getProperty("java.vm.specification.version"));  
   System.out.println("JavaµÄÐéÄâ»ú¹æ·¶¹©Ó¦ÉÌ£º"+props.getProperty("java.vm.specification.vendor"));  
   System.out.println("JavaµÄÐéÄâ»ú¹æ·¶Ãû³Æ£º"+props.getProperty("java.vm.specification.name"));  
   System.out.println("JavaµÄÐéÄâ»úʵÏÖ°æ±¾£º"+props.getProperty("java.vm.version"));  
   System.out.println("JavaµÄÐéÄâ»úʵÏÖ¹©Ó¦ÉÌ£º"+props.getProperty("java.vm.vendor"));  
   System.out.println("JavaµÄÐéÄâ»úʵÏÖÃû³Æ£º"+props.getProperty("java.vm.name"));  
   System.out.println("JavaÔËÐÐʱ»·¾³¹æ·¶°æ±¾£º"+props.getProperty("java.specification.version"));  
   System.out.println("JavaÔËÐÐʱ»·¾³¹æ·¶¹©Ó¦ÉÌ£º"+props.getProperty("java.specification.vender"));  
   System.out.println("JavaÔËÐÐʱ»·¾³¹æ·¶Ãû³Æ£º"+props.getProperty("java.specification.name"));  
   System.out.println("JavaµÄÀà¸ñʽ°æ±¾ºÅ£º"+props.getProperty("java.class.version"));  
   System.out.println("JavaµÄÀà·¾¶£º"+props.getProperty("java.class.path"));  
   System.out.println("¼ÓÔØ¿âʱËÑË÷µÄ·¾¶ÁÐ±í£º"+props.getProperty("java.library.path"));  
   System.out.println("ĬÈϵÄÁÙʱÎļþ·¾¶£º"+props.getProperty("java.io.tmpdir"));  
   System.o


Ïà¹ØÎĵµ£º

javaÐéÄâ»ú·½Ãæ

Ò»¡¢Àà×°ÔØÆ÷£ºÍ¨¹ý·Ö±ðʹÓò»Í¬µÄÀà×°ÔØÆ÷×°ÔØ¿É¿¿µÄ°üºÍ²»¿É¿¿µÄ°üÀ´ÊµÏÖ°² È«ÐÔ¡£
 
ÔÚ1.2°æ±¾µÄJavaÐéÄâ»ú¿ªÊ¼ÔËÐÐʱ£¬ÔÚÓ¦ÓóÌÐòÆô¶¯ÒÔǰ£¬ËüÖÁÉÙ´´½¨Ò»¸öÓû§×Ô¶¨ÒåÀà×°ÔØÆ÷£¬Ò²¿ÉÄÜÊǶà¸ö¡£ËùÓÐÕâЩÀà×°ÔØÆ÷±»Á¬½ÓÔÚÒ»¸öË«Ç×--º¢×ӵĹØÏµÁ´ÖУ¬ÔÚÕâÌõÁ´µÄ¶¥¶ËÊÇÆô¶¯Àà×°ÔØÆ÷£¬Ä©¶ËÊÇÒ»¸ö±»³ÆÎª“ϵͳÀà× ......

javaÒì³£´¦Àí¼¼ÇÉ´óÈ«

¡¡¡¡Java±à³ÌÖеÄÒì³£´¦ÀíÊÇÒ»¸öºÜ³£¼ûµÄ»°ÌâÁË£¬¼¸ºõÈκÎһÎéÉÜÐÔµÄJava¿Î³Ì¶¼»áÌáµ½Òì³£´¦Àí¡£²»¹ý£¬ÎÒÈÏΪºÜ¶àÈËÆäʵ²¢Ã»ÓÐÕæÕýÕÆÎÕÕýÈ·´¦ÀíÒì³£Çé¿öµÄ·½·¨ºÍ²ßÂÔ£¬×î¶àÒ²¾Í²»¹ýÁ˽â¸ö´ó¸Å£¬ÖªµÀµã¸ÅÄî¡£±¾ÎľͶÔÈýÖÖ²»Í¬³Ì¶ÈºÍÖÊÁ¿µÄJavaÒì³£´¦Àí½øÐÐÁËÌÖÂÛ£¬Ëù²ûÊöµÄ´¦ÀíÒì³£µÄ·½Ê½°´ÊÖ·¨µÄ¸ßÏ·ÖΪ£ººÃ£¬²»ºÃºÍ¶ñÁÓ ......

JAVA²ÎÊý´«µÝÖµ´«µÝµÄÀí½â¡£

Ê×ÏÈÃ÷ȷһϣºjavaÀïÃæÖ»ÓÐÖµ´«µÝ£¬ÒýÓô«µÝÖ»ÊÇÒ»Ö»Îó¶Á¶øÒÑ¡£
À´¿´Ò»¸öÀý×Ó£º
public static void main(String[] args)
{
StringBuffer str1 = new StringBuffer("hello");
test(str1);
System.out.println("main : " + str1);
}
public static void test(StringBuffer s ......

JavaÕ»Óë¶ÑµÄ˼¿¼£¨×ªÔØ£©

1. Õ»(stack)Óë¶Ñ(heap)¶¼ÊÇJavaÓÃÀ´ÔÚRamÖдæ·ÅÊý¾ÝµÄµØ·½¡£ÓëC++²»Í¬£¬Java×Ô¶¯¹ÜÀíÕ»ºÍ¶Ñ£¬³ÌÐòÔ±²»ÄÜÖ±½ÓµØÉèÖÃÕ»»ò¶Ñ¡£ 2. Õ»µÄÓÅÊÆÊÇ£¬´æÈ¡ËٶȱȶÑÒª¿ì£¬½ö´ÎÓÚÖ±½ÓλÓÚCPUÖеļĴæÆ÷¡£µ«È±µãÊÇ£¬´æÔÚÕ»ÖеÄÊý¾Ý´óСÓëÉú´æÆÚ±ØÐëÊÇÈ·¶¨µÄ£¬È±·¦Áé»îÐÔ¡£ÁíÍ⣬ջÊý¾Ý¿ÉÒÔ¹²Ïí£¬Ïê¼ûµÚ3µã¡£¶ÑµÄÓÅÊÆÊÇ¿ÉÒÔ¶¯Ì¬µØ·ÖÅäÄÚ ......

JavaÁ÷


//Îå¸öÀà
--|fileÀֱࣺ½ÓÓëÎļþ±¾ÉíÓйØÏµ
--|×Ö½ÚÁ÷ OutputStream InputStream 
--|×Ö·ûÁ÷ Writer Reader
´æ·ÅÔÚÎļþÖеͼÊÇ×Ö½Ú¡£¶ø¶Áµ½ÄÚ´æÖвſÉÄܱä³É×Ö·û
´òÓ¡Á÷£ºprintStream/PrintWriter:ÌṩÁ˸÷ÖÖ´òÓ¡¹¦ÄÜ£¬¿ÉÒÔÊä³öÈÎÒâµÄÄÚÈÝ£¬¸ù¾ÝʵÀý»¯¶ÔÏóµÄ²»Í¬
Êä³öµÄλÖÃÒ²²»Í¬

package java11.I ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ