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

JavaÖеÄÉÏÏÂתÐÍ

¼ûϱߵijÌÐò¶Î
package test;
class A {
    public String f(A obj)
    {
        return("A");
    }
}
class B extends A {
    public String f(B obj)
    {
        return("C");
    }
    public String f(A obj)
    {
        return("D");
    }
}
ÎÒÃÇʹÓÃ×ÓÀà´´½¨Ò»¸ö¶ÔÏó£º
B b = new B();
È»ºóÔÙ½«Õâ¸ö×ÓÀàµÄÒýÓ÷ŵ½¸¸Àà¶ÔÏóÖУº
A a;
a = b;
ÄÇôÕâ¸ö¸¸Àà¶ÔÏóaÊÇ×ÓÀà¶ÔÏóbµÄÉÏתÐͶÔÏ󣬶ÔÏóµÄʵÌåÓÉ×ÓÀฺÔð½¨Á¢£¬ÊµÖÊ»¹ÊÇ×ÓÀֻ࣬ÊÇËðʧÁËһЩ¹¦ÄܶøÒÑ£¬ÕâÑùµÄµÃʧ¾ßÌåÈçÏ£º
µÃ£ºÉÏתÐͶÔÏó¿ÉÒÔ²Ù×÷ºÍʹÓÃ×ÓÀà¼Ì³Ð»òÕßÖØÐ´µÄ·½·¨¡£
ʧ£ºÉÏתÐͶÔÏóɥʧÁ˶Ô×ÓÀàÐÂÔö³ÉÔ±±äÁ¿»òÐÂÔöµÄ·½·¨µÄ²Ù×÷ºÍʹÓá£
ÄÇôϱߵÄÕâ¶Î²âÊÔ´úÂëµÄ´òÓ¡½á¹û¾ÍÊÇ“D”£¬ÒòΪa2Ö»ÄÜÓÐpublic String f(A obj) Õâ¸ö·½·¨ÊÇ¿ÉÒÔÓõġ£
public class TestObj
{
    public static void main(String args[])
    {  A a1 = new A();
        A a2 = new B(); //×ÓÀà¶ÔÏóת»¯Îª¸¸À࣬³ÆÎªÉÏתÐÍ£¬²»ÐèÒªÇ¿ÖÆ×ª»»¡£
        B b = new B();
        System.out.println(a2.f(b)); //“D”
        System.out.println();
         if (a2 instanceof B) {
             B b1 = (B) a2;  //¸¸Àà¶ÔÏóת»¯ÎªÏÂתÐÍ£¬´ËʱÐèҪʹÓÃÇ¿ÖÆ×ª»»£¬´ËʱÐèÒªÏÈÅжÏҪת»»µÄÕâ¸ö¶ÔÏó£¨Ò²¾ÍÊÇa2Ö¸ÏòµÄÕâ¸ö¶ÔÏó£©ÊDz»ÊÇBÀàµÄʵÀý
            System.out.println(b1.f(b));//"C"
      


Ïà¹ØÎĵµ£º

javaÈëÃÅ

 Javaѧϰ´ÓÈëÃŵ½¾«Í¨ 
Ò»¡¢ JDK (Java Development Kit) 
JDKÊÇÕû¸öJavaµÄºËÐÄ£¬°üÀ¨ÁËJavaÔËÐл·¾³£¨Java Runtime Envirnment£©£¬Ò»¶ÑJava¹¤¾ßºÍJava»ù´¡µÄÀà¿â(rt.jar)¡£²»ÂÛʲôJavaÓ¦Ó÷þÎñÆ÷ʵÖʶ¼ÊÇÄÚÖÃÁËij¸ö°æ±¾µÄJDK¡£Òò´ËÕÆÎÕJDKÊÇѧºÃJavaµÄµÚÒ»²½¡£×îÖ÷Á÷µÄJ ......

java Óë c# 3des ¼Ó½âÃÜ

 
java Óë c# 3des ¼Ó½âÃÜ 
Ö÷Òª²îÒìÈçÏ£º
1¡¢ ¶ÔÓÚ´ý¼ÓÃܽâÃܵÄÊý¾Ý£¬¸÷×ÔµÄÌî³äģʽ²»Ò»Ñù
C#µÄģʽÓУºANSIX923¡¢ISO10126¡¢None¡¢PKCS7¡¢Zero£¬¶øJavaÓУºNoPadding¡¢PKCS5Padding¡¢SSL3Padding
2¡¢ ¸÷×ÔĬÈϵÄ3DESʵÏÖ£¬Ä£Ê½ºÍÌî³ä·½Ê½²»Ò»Ñù
C#µÄĬÈÏģʽΪCBC,ĬÈÏÌî³ä·½Ê½ÎªPKCS7; javaµÄĬÈÏģʽ ......

Javaѧϰ

     ÎÒÏÖÔÚÊÇÈí¼þѧԺ´ó¶þµÄѧÉú£¬ÎÒÃÇѧµÄ½Ì²ÄÊÇ¡¶JavaÓïÑÔ³ÌÐòÉè¼Æ¡·£¬ÏÖÔÚѧµÄÊǽø½×ƪ£¬¿ÉÊÇÎҸоõºÃÏñ»¹ÊÇʲô¶¼²»»á°¡£¡Èç¹ûÕæ¸øÎÒÒ»¸öÌâÄ¿ÈÃÎÒ×Ô¼ºÈ¥×ö£¬ÎÒÏëÎÒ»á×ö²»³öÀ´¡£²»¹ýÈç¹û¿´×ÅÊéȥʵÏÖÒ»¸ö¹¦ÄÜÎÒ»¹ÒªÏëºÜ¾Ã²Å»á×ö³öÀ´£¬Ò²ÐíÊÇÎÒѧϰ»¹²»¹ýÈÏÕæ£¬×Ô¼º¶¯ÊÖµÄÄÜÁ¦»¹Ã»ÓÐÑø³É£¬Ò²ÐíÊÇÎÒ´ ......

JAVAÓëactionscriptͨÐÅ ±ðÈ˵ľ­Ñé

 ÎÊÌ⣺
·þÎñÆ÷ÊÇÓÃjavaдµÄ£¬¿Í»§¶ËÊÇÓÃactionscript(ʹÓÃamf3)дµÄ£¬µ«ÊÇ·þÎñÆ÷¶ËÖ»·¢ËÍÁËÁ½´ÎÐÅÏ¢£¬
¿Í»§¶ËÈ´½ÓÊÕµ½Èý´ÎÊý¾Ý£¬·þÎñÆ÷¶ËÒ²ÊÇͬÑùµÄÎÊÌ⣬½ÓÊÕµ½¿Í»§¶ËµÄÈý´ÎÊý¾Ý£¬µ«Êǿͻ§¶ËÒ²Ö»·¢ÁË
Á½´ÎÐÅÏ¢¡£
ÓÉÓÚsocket´«ÊäÊý¾ÝʱÊǰ´¹Ì¶¨µÄ´óС´«ËÍ×Ö½ÚÊý¾ÝµÄ£¬µ«ÊÇÔÚflash¿Í»§¶Ë¶ÁÈ¡µÄ
ʱºòÊÇ¿¿Ò» ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ