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

javaËæ»úÊýµÄ²úÉú

1. import java.util.*; 
2.(A) public class Test
       { public static void main(String[] args)
         { 
         //Éú³É [0-n) ¸ö²»Öظ´µÄËæ»úÊý  st ÓÃÀ´±£´æÕâÐ©Ëæ»úÊý 
         ArrayList list = new ArrayList();  
         int n = 10; 
         Random rand = new Random();          
         boolean[] bool = new boolean[n];  
         int num =0;   
         for (int i = 0; i<n; i++)
                 { 
               do{//Èç¹û²úÉúµÄÊýÏàͬ¼ÌÐøÑ­»· 
                 num = rand.nextInt(n);     
             }while(bool[num]);  
             bool[num] =true;  
             list.add(num);
         } 
         System.out.println (list);     
    }
(B)        
    public class Test 
 { 
    public static void main(String[] args) 
     { 
      &


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 ......

javaÖÐÈ«½Çת»»Îª°ë½ÇµÄ·½·¨

ÔÚ»ñÈ¡Îı¾µÄʱºò£¬¾­³£Óöµ½Êý¾Ý¸ñʽµÄÎÊÌ⣬ÐèÒªÅжϻòת»»¡£
±¾ÎÄÖ¼ÔÚ½â¾öÈ«½Ç·ûºÅת»»Îª°ë½Ç·ûºÅµÄÎÊÌâ¡£
ÍøÉÏ´óÌåÓÐÁ½ÖÖ·½·¨£º×ª»»±àÂë»òÔòÌæ»»¡£
ÎÒʹÓõÄÊÇת»»±àÂë
1. string checkStr="£±£²£³456";
2. //ÅжÏÊÇ·ñ°üº¬È«½Ç×Ö·û[1]
3. if(checkStr.length() != checkStr.getBytes().length) ......

ÅÐ¶Ï Java ÖеĿÕ×Ö·û´®


ÒÔÏÂÊÇ Java ÅжÏ×Ö·û´®ÊÇ·ñΪ¿ÕµÄÈýÖÖ·½·¨.
·½·¨Ò»: ×î¶àÈËʹÓõÄÒ»¸ö·½·¨, Ö±¹Û, ·½±ã, µ«Ð§ÂʺܵÍ.
·½·¨¶þ: ±È½Ï×Ö·û´®³¤¶È, ЧÂʸß, ÊÇÎÒÖªµÀµÄ×îºÃÒ»¸ö·½·¨.
·½·¨Èý: Java SE 6.0 ²Å¿ªÊ¼ÌṩµÄ·½·¨, ЧÂʺͷ½·¨¶þ¼¸ºõÏàµÈ, µ«³öÓÚ¼æÈÝÐÔ¿¼ÂÇ, ÍÆ¼öʹÓ÷½·¨¶þ.
ÒÔÏ´úÂëÔÚÎÒ»úÆ÷ÉϵÄÔËÐнá¹û: (»úÆ÷ÐÔÄܲ»Ò», ½ö¹ ......

Javaѧϰ´ÓÈëÃŵ½¾«Í¨

Javaѧϰ´ÓÈëÃŵ½¾«Í¨
ѧϰǰÁ˽â
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÷µÄJDKÊÇSun¹«Ë¾·¢²¼µÄJDK£¬³ýÁËSunÖ®Í⣠......

[×îÖøÃû]µÄ¹úÍâJavaÍøÕ¾

Õ⼸Ì죬ÔÚÍøÉÏËÑÁËºÜ¶à¹ØÓÚjavaµÄ¶«Î÷£¬ÏÖÔÚ¸ø´ó¼Ò×ܽáһϣ¬·Ç³£ÓÐÓÃŶ£¬ºÜ¶à¶«Î÷ÎÒÃÇÔÚ¹úÄÚÊÇÎÞ·¨Á˽⵽µÄ
java³ÌÐòÔ±±ØÈ¥µÄ¹úÍâÍøÕ¾
http://www.onjava.com
ÿÖܶ¼ÓÐÐÂÎÄÕ·¢±í
http://www.developer.com/java
ÓÉGamelan.com ά»¤µÄJava¼¼ÊõÎÄÕÂÍøÕ¾
http://www.java.net
Sun¹«Ë¾Î¬»¤µÄÒ»¸öJavaÉçÇøÍøÕ¾
http:/ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ