Java Serializable(ÐòÁл¯£©µÄÀí½âºÍ×ܽá
1¡¢ÐòÁл¯ÊǸÉʲôµÄ£¿
¼òµ¥Ëµ¾ÍÊÇΪÁ˱£´æÔÚÄÚ´æÖеĸ÷ÖÖ¶ÔÏóµÄ״̬£¨Ò²¾ÍÊÇʵÀý±äÁ¿£¬²»ÊÇ·½·¨£©£¬²¢ÇÒ¿ÉÒ԰ѱ£´æµÄ¶ÔÏó״̬ÔÙ¶Á³öÀ´¡£ËäÈ»Äã¿ÉÒÔÓÃÄã×Ô¼ºµÄ¸÷ÖÖ¸÷ÑùµÄ·½·¨À´±£´æobject states£¬µ«ÊÇJava¸øÄãÌṩһÖÖÓ¦¸Ã±ÈÄã×Ô¼ººÃµÄ±£´æ¶ÔÏó״̬µÄ»úÖÆ£¬ÄǾÍÊÇÐòÁл¯¡£
2¡¢Ê²Ã´Çé¿öÏÂÐèÒªÐòÁл¯
a£©µ±ÄãÏë°ÑµÄÄÚ´æÖеĶÔÏó״̬±£´æµ½Ò»¸öÎļþÖлòÕßÊý¾Ý¿âÖÐʱºò£»
b£©µ±ÄãÏëÓÃÌ×½Ó×ÖÔÚÍøÂçÉÏ´«ËͶÔÏóµÄʱºò£»
c£©µ±ÄãÏëͨ¹ýRMI´«Êä¶ÔÏóµÄʱºò£»
3¡¢µ±¶ÔÒ»¸ö¶ÔÏóʵÏÖÐòÁл¯Ê±£¬¾¿¾¹·¢ÉúÁËʲô£¿
ÔÚûÓÐÐòÁл¯Ç°£¬Ã¿¸ö±£´æÔÚ¶Ñ£¨Heap£©ÖеĶÔÏó¶¼ÓÐÏàÓ¦µÄ״̬£¨state£©£¬¼´ÊµÀý±äÁ¿£¨instance ariable£©±ÈÈ磺
java ´úÂë
Foo myFoo = new Foo();
myFoo .setWidth(37);
myFoo.setHeight(70);
µ± ͨ¹ýÏÂÃæµÄ´úÂëÐòÁл¯Ö®ºó£¬MyFoo¶ÔÏóÖеÄwidthºÍHeightʵÀý±äÁ¿µÄÖµ£¨37£¬70£©¶¼±»±£´æµ½foo.serÎļþÖУ¬ÕâÑùÒÔºóÓÖ¿ÉÒÔ°ÑËü ´ÓÎļþÖжÁ³öÀ´£¬ÖØÐÂÔÚ¶ÑÖд´½¨ÔÀ´µÄ¶ÔÏó¡£µ±È»±£´æÊ±ºò²»½ö½öÊDZ£´æ¶ÔÏóµÄʵÀý±äÁ¿µÄÖµ£¬JVM»¹Òª±£´æÒ»Ð©Ð¡Á¿ÐÅÏ¢£¬±ÈÈçÀàµÄÀàÐ͵ÈÒÔ±ã»Ö¸´ÔÀ´µÄ¶Ô Ïó¡£
java ´úÂë
FileOutputStream fs = new FileOutputStream("foo.ser");
ObjectOutputStream os = new ObjectOutputStream(fs);
os.writeObject(myFoo);
4¡¢ÊµÏÖÐòÁл¯£¨±£´æµ½Ò»¸öÎļþ£©µÄ²½Öè
a£©Make a FileOutputStream
java ´úÂë
FileOutputStream fs = new FileOutputStream("foo.ser");
b£©Make a ObjectOutputStream
java ´úÂë
ObjectOutputStream os = new ObjectOutputStream(fs);
c£©write the object
java ´úÂë
os.writeObject(myObject1);
os.writeObject(myObject2);
os.writeObject(myObject3); &n
Ïà¹ØÎĵµ£º
ava IOѧϰ±Ê¼Ç£º¸ÅÄîÓëÔÀí
Ò»¡¢¸ÅÄî
JavaÖжÔÎļþµÄ²Ù×÷ÊÇÒÔÁ÷µÄ·½Ê½½øÐеġ£Á÷ÊÇJavaÄÚ´æÖеÄÒ»×éÓÐÐòÊý¾ÝÐòÁС£Java½«Êý¾Ý´ÓÔ´£¨Îļþ¡¢ÄÚ´æ¡¢¼üÅÌ¡¢ÍøÂ磩¶ÁÈëµ½ÄÚ´æÖУ¬ÐγÉÁËÁ÷£¬È»ºó½«ÕâЩÁ÷»¹¿ÉÒÔдµ½ÁíÍâµÄÄ¿µÄµØ£¨Îļþ¡¢ÄÚ´æ¡¢¿ØÖÆÌ¨¡¢ÍøÂ磩£¬Ö®ËùÒÔ³ÆÎªÁ÷£¬ÊÇÒòΪÕâ¸öÊý¾ÝÐòÁÐÔÚ²»Í¬Ê±¿ÌËù²Ù ......
Java IOѧϰ±Ê¼Ç£º×Ö½ÚÁ÷
×Ö½ÚÁ÷ÊÇ×î»ù±¾µÄÁ÷£¬ÎļþµÄ²Ù×÷¡¢ÍøÂçÊý¾ÝµÄ´«ÊäµÈµÈ¶¼ÒÀÀµÓÚ×Ö½ÚÁ÷¡£¶ø×Ö·ûÁ÷³£³£ÓÃÓÚ¶ÁÈ¡Îı¾ÀàÐ͵ÄÊý¾Ý»ò×Ö·û´®Á÷µÄ²Ù×÷µÈµÈ¡£
¹ØÓÚ×Ö½ÚÁ÷µÄAPI£¬Ã»Ê²Ã´ºÃ˵µÄ£¬¿´¿´¾ÍÖªµÀÁË¡£ÕâÀïÌô¼¸¸ö¹Ø¼üµã£º
Ò»¡¢InputStreamµÄAPI
1¡¢public int read()
´ÓÊäÈëÁ÷¶ÁÈ¡ÏÂÒ»¸ö ......
JAVAËÄÖÖ»ù±¾ÅÅÐò,°üÀ¨Ã°ÅÝ·¨,²åÈë·¨,Ñ¡Ôñ·¨,SHELLÅÅÐò·¨.ÆäÖÐÑ¡Ôñ·¨ÊÇðÅÝ·¨µÄ¸Ä½ø,SHELLÅÅÐò·¨ÊÇ ²åÈë·¨µÄ¸Ä½ø.ËùÒÔ´Ó¸ù±¾ÉÏÀ´Ëµ¿ÉÒÔ¹éÄÉΪÁ½ÖÖ²»Í¬µÄÅÅÐò·½·¨:¼´:²åÈë·¨£¦Ã°ÅÝ·¨
Ò» ²åÈë·¨:±éÀúÅÅÐò¼¯ºÏ£¬Ã¿µ½Ò»¸öÔªËØÊ±£¬¶¼Òª½«Õâ¸öÔªËØÓëËùÓÐËü֮ǰµÄÔªËØ±éÀú±È½ÏÒ»±é£¬È÷ûºÏÅÅÐò˳ÐòµÄÔªËØ°¤¸öÒÆ¶¯µ½µ ......
ºÜÓôÃÆ Ò»¶ÎºÜ¼òµ¥µÄ´úÂë °ÑARGBתΪRGBA£¬½á¹ûͼÏñÑÕɫƫºì¡£
¸ãÁ˺ܾ㬲ÅÖªµÀÎÊÌâ³öÔÚÁËbyteÉíÉÏ¡£
Ò»¸öÑÕÉ«·ÖÁ¿8룬Ï뵱ȻµÄÓÃÁËbyte£¬×éºÏ³ÉÒ»¸öÏñËØ32룬¾ÍÊÇ
(r<<24)|(g<<16)|(b<<8)|(a)
ÎÊÌâ¾Í³öÔÚÁËbyteµ½intµÄת»»ÉÏ
byteÔÚJavaÖÐÊÇÓзûºÅµÄ £¨win32ÖÐÊÇunsigned char£©
Õ ......
½ñÌìÔÚCSDN¹äÂÛ̳µÄʱºòÎÞÒâÖз¢ÏÖÓÐÈËÎÊÔÚJavaÖÐÊÇ·ñÓÐReadOnly²Ù×÷·½Ê½µÄ¼¯ºÏ£¬ËµÊµ»°ÔÚÒÔÍù¿ª·¢Öи÷ÖÖ¼¯ºÏÓõĺܶ࣬µ«ÊÇÕâ¸öÎÊÌâ»¹ÕæÃ»ÓÐ×¢Òâ¹ý¡£È¥JavaµÄ¹Ù·½APIÎĵµ²éÁËһϣ¬CollectionsÖл¹ÕæÓÐÕâô¸ö·½·¨Ö§³Ö£¬·½·¨ÔÐÍÈçÏ£º
unmodifiableCollection
public static <T> Collection<T> unmodifiable ......