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Chapter I.
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(1) ×îÃ÷ÏԵĺô¦ÊÇ£¬Ñ§»áJava£¬¿ÉÒԲμÓJava Challenge  
(2) ¶ÔÓÚÊìϤC/C++µÄ³ÌÐòÔ±À´Ëµ£¬Java ²¢²»ÄÑѧ£¬ÕÒ±¾Ê飬һÁ½ÖÜÒµÓàʱ¼ä¾Í¿ÉÒԸ㶨ÁË¡£µ±È»£¬ÕâÀïÖ»ÊÇÖ¸Ò»°ã±à³Ì£¬ÏëÊìϤËùÓеÄJava¿â»¹ÊÇÐèҪЩʱ¼äµÄ¡£ÊÂʵÉÏ£¬Java Ö»Ï൱ÓÚC++µÄÒ»¸ö¸Ä½ø°æ£¬ËùÓеÄÓï·¨¶¼¼¸ºõÊÇC++µÄ£¬ºÜÉÙÓб䶯¡£
(3) ÔÚÒ»°ã±ÈÈüÖУ¬Java³ÌÐò»áÓжîÍâµÄʱ¼äºÍ¿Õ¼ä£¬¶øÊµ¼ÊÉϾ­¹ýʵÑ飬ÔÚÖ´ÐмÆËãÃܼ¯ÈÎÎñµÄʱºòJava²¢²»±ÈC/C++Âý¶àÉÙ£¬Ö»ÊÇIO²Ù×÷½ÏÂý¶øÒÑ¡£
(4) Java ¼òµ¥¶ø¹¦ÄÜÇ¿´ó£¬ÓÐЩ¶«Î÷ÓÃJavaʵÏÖÆðÀ´¸üΪ·½±ã£¬±ÈÈç¸ß¾«¶È¡£
(5) ÓÃJava²»Ò×·¸Ï¸Î¢µÄ´íÎ󣬱ÈÈçC/C++ÖеÄÖ¸Õ룬 “if (n = m) ... ” µÈ
(6) ĿǰÀ´¿´EclipseÒѳɻù±¾ÅäÖã¬Ð´Java³ÌÐò·´¶ø±ÈC/C++¸ü·½±ãµ÷ÊÔ¡£ÔÚ¾ßÌ徺ÈüʱҲËã¶àÒ»ÖÖÑ¡Ôñ¡£
(7) ѧ»áJava¶ÔÒÔºó¹¤×÷Óкô¦¡£ÏÖÔÚ¹úÍâºÜ¶àµØ·½»áJavaµÄÈ˱ȻáC/C++µÄÈ˶ࡣ
(8) »áJava¿ÉÒÔʹÄã¿´ÆðÀ´¸üÏñżÌãÀදÎţ£©    hoho~
Chapter II.
ÏÂÃæËµÒ»ÏÂACM-ICPC¶ÓÔ±³õÓÃJava±à³ÌËùÓöµ½µÄһЩÎÊÌ⣺
1. »ù±¾ÊäÈëÊä³ö£º
(1) JDK 1.5.0 ÐÂÔöµÄScannerÀàΪÊäÈëÌṩÁËÁ¼ºÃµÄ»ù´¡£¬¼òÖ±¾ÍÊÇΪACM-ICPC¶øÉèµÄ¡£
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import java.io.*
import java.util.*
public class Main
{
     public static void main(String args[])
     {
         Scanner cin = new Scanner(new BufferedInputStream(System.in));
         ...
     }
}
µ±È»Ò²¿ÉÒÔÖ±½Ó Scanner cin = new Scanner(System.in);
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(2)
¶ÁÒ»¸öÕûÊý£º   int n = cin.nextInt();         Ï൱ÓÚ   scanf("%d", &n);   »ò cin >> n;
¶ÁÒ»¸ö×Ö·û´®£ºString s = cin.next();         Ï൱ÓÚ   scanf("%s", s);    »ò cin >> s;
¶ÁÒ»¸ö¸¡µãÊý£ºdouble t = cin.nextDouble();   Ï൱ÓÚ   scanf("%lf", &t); »ò cin >> t;
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