JavaÓïÑÔÖÐthis, super, synchronized
1.
superÊǵ÷Óø¸ÀàµÄ¹¹Ô캯Êý
2.
thisµ÷ÓõÄͬÀàµÄ¹¹Ô캯Êý.
3.
3.1
synchronized¹Ø¼ü×ÖµÄ×÷ÓÃÓòÓжþÖÖ
3.1.1
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»¸ösynchronized·½·¨£©¡£Õâʱ£¬²»Í¬µÄ¶ÔÏóʵÀýµÄsynchronized·½·¨ÊDz»Ïà¸ÉÈŵġ£Ò²¾ÍÊÇ˵£¬ÆäËüÏß³ÌÕÕÑù¿ÉÒÔͬʱ·ÃÎÊÏàͬÀàµÄÁíÒ»¸ö¶ÔÏóʵÀýÖеÄsynchronized·½·¨£»
3.1.2
ÊÇij¸öÀàµÄ·¶Î§£¬synchronized static aStaticMethod{}·ÀÖ¹¶à¸öÏß³Ìͬʱ·ÃÎÊÕâ¸öÀàÖеÄsynchronized static ·½·¨¡£Ëü¿ÉÒÔ¶ÔÀàµÄËùÓжÔÏóʵÀýÆð×÷Óá£
3.2
³ýÁË·½·¨Ç°ÓÃsynchronized¹Ø¼ü×Ö£¬synchronized¹Ø¼ü×Ö»¹¿ÉÒÔÓÃÓÚ·½·¨ÖеÄij¸öÇø¿éÖУ¬±íʾֻ¶ÔÕâ¸öÇø¿éµÄ×ÊԴʵÐл¥³â·ÃÎÊ¡£Ó÷¨ÊÇ: synchronized(this){/*Çø¿é*/}£¬ËüµÄ×÷ÓÃÓòÊǵ±Ç°¶ÔÏó£»
3.3
synchronized¹Ø¼ü×ÖÊDz»Äܼ̳еģ¬Ò²¾ÍÊÇ˵£¬»ùÀàµÄ·½·¨synchronized f(){} Ôڼ̳ÐÀàÖв¢²»×Ô¶¯ÊÇsynchronized f(){}£¬¶øÊDZä³ÉÁËf(){}¡£¼Ì³ÐÀàÐèÒªÄãÏÔʽµÄÖ¸¶¨ËüµÄij¸ö·½·¨Îªsynchronized·½·¨£»
Ïà¹ØÎĵµ£º
ÀàµÄ³õʼ»¯ºÍ¶ÔÏó³õʼ»¯ÊÇ JVM ¹ÜÀíµÄÀàÐÍÉúÃüÖÜÆÚÖзdz£ÖØÒªµÄÁ½¸ö»·½Ú£¬Google ÁËÒ»±éÍøÂ磬ÓйØÀà×°ÔØ»úÖƵÄÎÄÕµ¹ÊDz»ÉÙ£¬È»¶øÀà³õʼ»¯ºÍ¶ÔÏó³õʼ»¯µÄÎÄÕ²¢²»¶à£¬ÌرðÊÇ´Ó×Ö½ÚÂëºÍ JVM ²ã´ÎÀ´·ÖÎöµÄÎÄÕ¸üÊÇÏÊÓÐËù¼û¡£
±¾ÎÄÖ÷Òª¶ÔÀàºÍ¶ÔÏó³õʼ»¯È«¹ý³Ì½øÐзÖÎö£¬Í¨¹ýÒ»¸öʵ¼ÊÎÊÌâÒýÈ룬½«Ô´´úÂëת»»³É JVM ×Ö½ÚÂëºó£¬ ......
JavaÓïÑԵĹؼü×Ö£¬ÓÃÀ´±íʾһ¸öÓò²»ÊǸöÔÏó´®Ðл¯µÄÒ»²¿·Ö¡£µ±Ò»¸ö¶ÔÏó±»´®Ðл¯µÄʱºò£¬transientÐͱäÁ¿µÄÖµ²»°üÀ¨ÔÚ´®Ðл¯µÄ±íʾÖУ¬È»¶ø·ÇtransientÐ͵ıäÁ¿ÊDZ»°üÀ¨½øÈ¥µÄ
¡¡¡¡Java´úÂë
¡¡¡¡class A implements Serializable {
¡¡¡¡private String name;
¡¡¡¡transient private String address;
¡¡¡¡}
¡¡¡¡ÄÇÃ´Ä ......
ǰЩʱºò£¬°Ñ¡¶Thinking in Java¡·ÖÐÒì³£ÕâÒ»Õ·³öÀ´ÔÙ´ÎÑжÁ£¬±¾ÈËÓÐЩÊÕ»ñ£¬²¢ÇÒÓÐЩ¹ÛµãºÍ×÷Õ߹۵㲻̫һÖ£¬¹²ÏíÖ®
1.Òì³£µÄ¶¨Òå
Ò»¸öϵͳÖж¨ÒåÒì³£Ó¦×ñÑÈçϼ¸¸öÔÔò£º
a. ϵͳÖÐÈç¹ûij¸öÄ£¿é¹¦ÄܱȽϵ¥Ò»£¬½¨Ò齫ËùÓÐÒì³£·ÅÔÚÒ»¸öpackageÄÚ£»Èç¹ûij¸öÄ£¿éÓкܶà×ÓÄ£¿é£¬ ......
1¡¢ÈçºÎ½«×Ö·û´®Stringת»¯ÎªÕûÊýint
int i = Integer.parseInt(str);
int i = Integer.valueOf(my_str).intValue();
×¢: ×Ö´®×ª³ÉDouble, Float, LongµÄ·½·¨´óͬСÒì¡£
2¡¢ÈçºÎ½«×Ö·û´®Stringת»¯ÎªInteger
Integer integer=Integer.valueOf(i)
3¡¢ÈçºÎ½«ÕûÊý ......