javaÖÐ stringÀàÐÍת»»³ÉUTF 8
1¡¢²âÊÔ·½·¨ÈçÏ£º
public static String toUtf8(String str) {
return new String(str.getBytes("UTF-8"),"UTF-8"):
}
±¸×¢ËµÃ÷£º
str.getBytes("UTF-8"); µÄÒâ˼ÊÇÒÔUTF-8µÄ±àÂëÈ¡µÃ×Ö½Ú
new String(XXX,"UTF-8"); µÄÒâ˼ÊÇÒÔUTF-8µÄ±àÂëÉú³É×Ö·û´®
Ïà¹ØÎĵµ£º
Õâ¶Îʱ¼äΪ¹«Ë¾ÄÚ²¿µÄÊý¾Ý´¦Àí¿ª·¢ÁËÒ»¸ö¹¤¾ß£¬Ç£Éæµ½ÔÚOracleÖм¯³ÉjavaÓ¦Óã¬×ܽáÁËһЩ¾Ñ飬ÒÔ¹©´ó¼Ò²Î¿¼ÁË£¡
³ÌÐò·ÖÁ½²¿·Ö£¬Ç°¶Ë½çÃæÓÉVB/VC¿ª·¢£¬Ö÷ҪʵÏÖÊý¾Ý´¦ÀíÅäÖü°³£¹æ¼Ç¼ÔËË㣬Õⲿ·ÖûÓÐʲôºÃ˵µÄÁË¡£
ºǫ́ÒÔOracleΪÊý¾Ý»ù´¡´¦ÀíÍйÜƽ̨£¬ÔÚÊý¾Ý´¦Àí¹ý³ÌÖУ¬ÐèÒª¶ÔһЩÃû³Æ¡¢µØַʲôµÄ½øÐÐÕªÒªÌáÈ¡¡¢² ......
java ͨ¹ýSystem.getProperties()»ñȡϵͳ²ÎÊý
Properties props=System.getProperties(); //ϵͳÊôÐÔ
System.out.println("JavaµÄÔËÐл·¾³°æ±¾£º"+props.getProperty("java.version"));
System.out.println("JavaµÄÔËÐл·¾³¹©Ó¦ÉÌ£º"+props.getProperty("java.vendor"));
......
×÷ΪJava³ÌÐòÔ±À´Ëµ£¬×îÍ´¿àµÄÊÂÇéĪ¹ýÓÚ¿ÉÒÔÑ¡ÔñµÄ·¶Î§Ì«¹ã£¬¿ÉÒÔ¶ÁµÄÊéÌ«¶à£¬ÍùÍùÈÝÒ×ÎÞËùÊÊ´Ó¡£ÎÒÏë¾ÍÎÒ×Ô¼º¶Á¹ýµÄ¼¼ÊõÊé¼®ÖÐÌôÑ¡³öÀ´Ò»Ð©£¬°´ÕÕѧϰµÄÏȺó˳Ðò£¬ÍƼö¸ø´ó¼Ò£¬ÌرðÊÇÄÇЩÏë²»¶ÏÌá¸ß×Ô¼º¼¼ÊõˮƽµÄJava³ÌÐòÔ±ÃÇ¡£
Ò»¡¢Java±à³ÌÈëÃÅÀà
¶ÔÓÚûÓÐJava±à³Ì¾ÑéµÄ³ÌÐòÔ±ÒªÈëÃÅ£¬Ëæ±ã¶ÁʲôÈëÃÅÊé¼®¶¼Ò»Ñù£¬Õâ ......
JavaÄÚ´æ·ÖÅä:
1. ¼Ä´æÆ÷£ºÎÒÃÇÔÚ³ÌÐòÖÐÎÞ·¨¿ØÖÆ
2. Õ»£º´æ·Å»ù±¾ÀàÐ͵ÄÊý¾ÝºÍ¶ÔÏóµÄÒýÓ㬵«¶ÔÏó±¾Éí²»´æ·ÅÔÚÕ»ÖУ¬¶øÊÇ´æ·ÅÔÚ¶ÑÖÐ
3.
¶Ñ£º´æ·ÅÓÃnew²úÉúµÄÊý¾Ý
4. ¾²Ì¬Óò£º´æ·ÅÔÚ¶ÔÏóÖÐÓÃstatic¶¨ÒåµÄ¾²Ì¬³ÉÔ±
5. ³£Á¿³Ø£º´æ·Å³£Á¿
6. ·ÇRAM(Ëæ»ú´æÈ¡´æ´¢Æ÷)´æ´¢£ºÓ²Å̵ÈÓÀ¾Ã´æ´¢¿Õ¼ä
------------------------- ......
JAVAÖÐλÔËËã·û°üÀ¨: & | ~ ^ << >> >>>
Ò»¡¢Ê×ÏÈÒª¸ãÇå³þ²ÎÓëÔËËãµÄÊýµÄλÊý£º
javaµÄ8ÖÖ»ù±¾ÀàÐÍ£ºbyte,short, char, int, long,float,double,boolean.
ÔÚÄÚ´æÖй̶¨³¤¶È(×Ö½Ú)£º1&nbs ......