java emun µÄ±ðÑùÓ÷¨£¬¿ÉÒÔѧϰÏ£¬
package com.zwc.www.test;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
public class OperateEnum {
//first emun
enum PeopleTypeOne{RED,YELLOW,BLACK};
//second emun
public enum PeopleTypeTwo{
RED("a","#111111"),
YELLOW("b","#222222"),
BLACK("c","#333333");
private String value1;
×¢Ò⣺ÕâÀïµÄ¶¨Òå¿ÉÒÔ¶¨ÒåΪfinal ÍêÈ«¿ÉÒÔ±àÒëͨ¹ý£¬¿ÉÒÔÔËÐУ¬ºÃÏñÕâÊÇjavaµÄÒ»¸öbug
private String value2;
×¢ÒâÕâÀïµÄ¹¹Ôì·½·¨£¬Ó¦¸ÃÓëÄãÉÏÃæµÄ¶¨Ò壬±£³ÖÒ»Ö£¬
»¹ÓУº²»Äܶ¨ÒåΪpublic £¬Ö»ÄÜÊÇĬÈϵÄȨÏÞ£¬»òÕßÊÇprivate
PeopleTypeTwo(String value1,String value2){
this.value1 = value1;
this.value2 = value2;
}
×¢Ò⣺ÕâÀïµÄ·½·¨µÄ¶¨Ò壬ÍêÈ«ÊÇΪÁ˳ÌÐòÍâÃæµÄ·ÃÎÊ£¬ÈçÏÂÃæmainº¯ÊýµÄµ÷Óã¬
ÕâÀÆäʵÍêÈ«¿ÉÒÔÓÃÒ»¸öget·½·¨£¬Ö±½Ó·µ»Ø¶ÔÓ¦µÄÖµ£¬Èç #222222 £¬µ«ÊÇΪÁ˲âÊÔÕâÀïÊÇ·ñÖ§³Ömap£¬ËùÒÔ£¬¾ÍÓÃÁËmap£¬ÏÂÃæµÄÀý×Ó£¬Ò²µ÷ÓÃÁËmap£¬¾ßÌå¿ÉÒÔ£¬²Î¿¼ÏÂÃæµÄ´úÂ룬
public Map<String,String> getMap(){
Map<String,String> map = new HashMap<String,String>();
map.put(this.value1, this.value2);
return map;
}
}
public static void main(String[] args) {
//first emun
PeopleTypeOne p1 = PeopleTypeOne.BLACK;
System.out.println("tradition:" + (p1.ordinal() + 1));
//second emun
PeopleTypeTwo p2 = PeopleTypeTwo.RED;
Map<String,String> map = p2.getMap();
Iterator<String> i = p2.getMap().keySet().iterator();
while(i.hasNext()){
String key = i.next();
String value = map.get(key);
System.out.println("key=" + key + " value=" + value);
}
}
}
Ïà¹ØÎĵµ£º
ÏÂÃæµÄÃÕÌâÒÔ¼°ËæºóµÄÎå¸öÃÕÌâ¶ÔÄãÀ´ËµÊÇŤתÁ˾ÖÃæ£¬ËüÃDz»ÊÇÏòÄãչʾijЩ´úÂ룬ȻºóѯÎÊÄãÕâЩ´úÂ뽫×öЩʲô£¬ËüÃÇÒªÈÃÄãȥд´úÂ룬µ«ÊÇÊýÁ¿»áºÜÉÙ¡£ÕâЩÃÕÌâ±»³ÆÎª“Ñ»·Õߣ¨looper£©”¡£ÄãÑÛǰ»áչʾ³öÒ»¸öÑ»·£¬Ëü¿´ÆðÀ´Ó¦¸ÃºÜ¿ì¾ÍÖÕÖ¹µÄ£¬¶øÄãµÄÈÎÎñ¾ÍÊÇдһ¸ö±äÁ¿ÉùÃ÷£¬ÔÚ½«Ëü×÷ÓÃÓÚ¸ÃÑ»·Ö®ÉÏʱ£¬Ê¹µÃ¸Ã ......
javaÓëmysqlÂÒÂëµÄÎÊÌâ
javaÓëmysqlÂÒÂëµÄÎÊÌâ
¹Ø¼ü×Ö: javaÓëmysqlÂÒÂëµÄÎÊÌâ
½â¾ö·½·¨Ò»:(×îÖØÒªµÄÒ»ÖÖ·½·¨)
Äã¿´ÏÂmy.ini£¬ÓÐÎÞ
[mysql]
default-character-set=utf8
[client]
default-character-set=utf8
[mysqld]
default-character-set=utf8
È»ºó½¨Á¢±íʱ£¬Ò²ÒªÓ㨱ÈÈ磩
DROP TABLE IF ......
ÇëÌṩһ¸ö¶ÔiµÄÉùÃ÷£¬½«ÏÂÃæµÄÑ»·×ª±äΪһ¸öÎÞÏÞÑ»·¡£Õâ¸öÑ»·²»ÐèҪʹÓÃÈκÎ5.0°æµÄÌØÐÔ£º
while (i != 0 && i == -i) {
}
ÕâÈÔÈ»ÊÇÒ»¸öÑ»·¡£ÔÚ²¼¶û±í´ïʽ(i != 0 && i == -i)ÖУ¬Ò»Ôª¼õºÅ²Ù×÷·û×÷ÓÃÓÚi£¬ÕâÒâζ×ÅËüµÄÀàÐͱØÐëÊÇÊý×ÖÐ͵ģºÒ»Ôª¼õºÅ²Ù×÷·û×÷ÓÃÓÚÒ»¸ö·ÇÊý×ÖÐͲÙ×÷ÊýÊÇ·Ç·¨µÄ¡£Òò´Ë£ ......
ÏÂÃæÕâ¸ö¿ÉÁ¯µÄС³ÌÐò²¢²»ÄܺܺõØ×ö³öÆä×Ô¼ºµÄ¾ö¶¨¡£ËüµÄdecision·½·¨½«·µ»Øtrue£¬µ«ÊÇËü»¹·µ»ØÁËfalse¡£ÄÇô£¬Ëüµ½µ×´òÓ¡µÄÊÇÊ²Ã´ÄØ£¿ÉõÖÁ£¬ËüÊǺϷ¨µÄÂð£¿
public class Indecisive {
public static void main(String[] args) {
System.out.println(decision());
}
static boolean decision( ......
±¾ÃÕÌâÖеijÌÐòËù½¨Ä£µÄϵͳ£¬½«³¢ÊÔ×Å´ÓÆä»·¾³ÖжÁȡһ¸öÓû§ID£¬Èç¹ûÕâÖÖ³¢ÊÔʧ°ÜÁË£¬ÔòȱʡµØÈÏΪËüÊÇÒ»¸öÀ´±öÓû§¡£¸Ã³ÌÐòµÄ×÷Õß½«Ãæ¶ÔÓÐÒ»¸ö¾²Ì¬ÓòµÄ³õʼ»¯±í´ïʽ¿ÉÄÜ»áÅ׳öÒì³£µÄÇé¿ö¡£ÒòΪJava²»ÔÊÐí¾²Ì¬³õʼ»¯²Ù×÷Å׳ö±»¼ì²éÒì³££¬ËùÒÔ³õʼ»¯±ØÐë°ü×°ÔÚtry-finallyÓï¾ä¿éÖС£ÄÇô£¬ÏÂÃæµÄ³ÌÐò»á´òÓ¡³öÊ²Ã´ÄØ£¿
pu ......