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--------------------- | --------------------- System Runtime Comparable ThreadLocal --------------------- System | --------------------- # Àà ¡ª¡ªÏµÍ³Àà # ûÓй¹Ô캯Êý£¬²»Äܱ»ÊµÀý»¯¡£ÀïÃæµÄ·½·¨È«ÊǾ²Ì¬µÄ¡£ # ¾²Ì¬·½·¨ static void arraycopy(Object src, int srcPos, Object dest, int destPos, int length) * ´ÓÖ¸¶¨Ô´Êý×éÖи´ÖÆÒ»¸öÊý×飬¸´ÖÆ´ÓÖ¸¶¨µÄλÖÿªÊ¼£¬µ½Ä¿±êÊý×éµÄÖ¸¶¨Î»ÖýáÊø¡£ long currentTimeMillis() ·µ»ØÒÔºÁÃëΪµ¥Î»µÄµ±Ç°Ê±¼ä¡£ void exit(int status) ÖÕÖ¹µ±Ç°ÕýÔÚÔËÐÐµÄ Java ÐéÄâ»ú¡£ void gc() ÔËÐÐÀ¬»ø»ØÊÕÆ÷¡£ --------------------- Runtime | --------------------- # ûÓй¹Ô캯Êý£¬²»Äܱ»ÊµÀý»¯¡£ # ËüÆäʵÊÇÒ»¸öµ¥Àý¡£ÓÐÒ»¸ö¾²Ì¬·½·¨£¬¿ÉÒÔ»ñÈ¡ËüµÄ¶ÔÏó£¡ # ¸Ã·½·¨ÊÇ Runtime runtime = Runtime.getRuntime(); # Runtime Process exec("CMD/shellÃüÃû"); * ¿ÉÒÔÖ´ÐÐÒ»¶Îµ±Ç°²Ù×÷ϵͳµÄÃüÁî¡£ long maxMemory() * ·µ»Ø Java ÐéÄâ»úÊÔͼʹÓõÄ×î´óÄÚ´æÁ¿¡£ long totalMemory() * ·µ»Ø Java ÐéÄâ»úÖеÄÄÚ´æ×ÜÁ¿¡£ # Process void prop.destroy(); * ɱËÀ½ø³Ì¡£(Ö»ÄÜŪËÀËüÆô¶¯µÄ³ÌÐò) InputStream prop.getInputStream(); * ¿ÉÒÔ»ñÈ¡µ½cmdµÄÒ»¸öÊäÈëÁ÷,Ö´ÐÐÁËcmdÃüÃûºó¿ÉÒÔ¶ÁÈ¡µ½cmdÏÔʾ³öÀ´µÄÄÚÈÝ InputStream getErrorStream() * »ñÈ¡×Ó½ø³ÌµÄ´íÎóÁ÷¡£ InputStream getInputStream() * »ñȡдÈëÁ÷ int exitValue(); * ´Ë Process ¶ÔÏó±íʾµÄ×Ó½ø³ÌµÄ³ö¿ÚÖµ¡£¸ù¾Ý¹ßÀý£¬Öµ 0 ±íʾÕý³£ÖÕÖ¹¡£ int waitFor(); * µ±ÆÚÏ̻߳áÒ»Ö±×èÈû,Ö±µ½ Process ¶ÔÏó±íʾµÄ½ø³ÌÒѾ­ÖÕ --------------------- Comparable | --------------------- # int compareTo(T o) * ±È½Ï´Ë¶ÔÏóÓëÖ¸¶¨¶ÔÏóµÄ˳Ðò¡£ -------------------- ThreadLocal | -------------------- Õâ¸ö¶«Î÷ÀïÃæÆäʵÊÇÒ»¸öMap¼¯ºÏ ÒÔµ±Ç°Ïß³ÌΪ¼ü! ÿ¸öÏß³ÌÖ»ÄÜÈ¡³ö/ÉèÖÃ×Ô¼ºÏ̵߳Ķ«Î÷£¡ Map map = new HashMap(); set(); get(); remove(); ͨ³£ÓÃÔÚÒ»¸öÀàµÄ³ÉÔ±ÉÏ,¶à¸öÏ̷߳ÃÎÊËüʱ ÿ¸öÏ̶߳¼ÓÐ×Ô¼ºµÄ¸±±¾¡£»¥²»¸ÉÈÅ SpringÖÐ,°Ñ Connection ·Åµ½ÁË ThreadLocal ÖС£