java StringÓëunicode
java StringÓëunicode
java.nio.charset.Charset
public static Charset defaultCharset()
´Ë·½·¨µÄ×÷Ó㺷µ»ØjavaÐéÄâ»úµÄĬÈÏ×Ö·û¼¯£¬Ä¬ÈϵÄ×Ö·û¼¯È¡¾öÓÚ²Ù×÷ϵͳµÄ×Ö·û¼¯¡£
java.lang.String
public byte[] getBytes()
´Ë·½·¨µÄ×÷Ó㺱àÂë×Ö·û´®µ½Ò»¸ö×Ö½ÚÁ÷ÐòÁУ¬´Ëʱ²ÉÓõıàÂëÊÇÆ½Ì¨Ä¬ÈϵıàÂ룬Èç¹ûÏë»ñµÃÖ¸¶¨±àÂëµÄ×Ö½ÚÐòÁÐ,¿ÉÓÃÏÂÃæÕâ¸ö·½·¨£º
public byte[] getBytes(String charsetName)
°´ÕÕÖ¸¶¨±àÂë·µ»Ø´Ë×Ö·û´®µÄ±àÂë¸ñʽ¡£
Ö¤¾ÝÈçÏ£º
String str = "ÎÒ";
System.out.println(Integer.toHexString(codePoint));
byte[] bs = str.getBytes();
System.out.println(Charset.defaultCharset());
for (int i=0; i<bs.length; i++) {
System.out.print(bs[i] + " ");
£ý
System.out.println();
6211
GBK
-50 -46
µ±Ö¸¶¨±àÂëΪUTF-8ʱ£º
6211
GBK
-26 -120 -111
µ±Ö¸¶¨ÎªUTF-16ʱ£º
-2 -1 98 17
×¢Òâ´Ë´¦Êä³öÁËËĸö×Ö½Ú£¬ÊÇÒòÎªÇ°ÃæÁ½¸ö×Ö½ÚÊÇÓÃÀ´±íʾ×Ö·ûµÄ±àÂëÐòÁÐ.
public int codePointAt(int index)
·µ»ØÖ¸¶¨Ë÷Òý´¦µÄ×Ö·û£¨Unicode ´úÂëµã£©¡£¸ÃË÷ÒýÒýÓà char Öµ£¨Unicode ´úÂëµ¥Ôª£©£¬Æä·¶Î§´Ó 0 µ½length()- 1¡£
×¢Òâ×Ö·û´®ÔÚÄÚ´æÖÐÊÇÒÔunicode´úÂëµãµÄ·½Ê½´æ´¢µÄ¡£
public String(byte[] bytes, String charsetName)
throws UnsupportedEncodingException
¹¹ÔìÒ»¸öÐ嵀 String£¬·½·¨ÊÇʹÓÃÖ¸¶¨µÄ×Ö·û¼¯½âÂëÖ¸¶¨µÄ×Ö½ÚÊý×é¡£Ð嵀 String µÄ³¤¶ÈÊÇÒ»¸ö×Ö·û¼¯º¯Êý£¬Òò´Ë²»ÄܵÈÓÚ×Ö½ÚÊý×éµÄ³¤¶È¡£
public String[] split(String regex)
¸ù¾Ý¸ø¶¨µÄÕýÔò±í´ïʽµÄÆ¥ÅäÀ´²ð·Ö´Ë×Ö·û´®¡£
¸Ã·½·¨µÄ×÷ÓþÍÏñÊÇʹÓøø¶¨µÄ±í´ïʽºÍÏÞÖÆ²ÎÊý 0 À´µ÷ÓÃÁ½Òò´Ë£¬½á¹ûÊý×éÖв»°üÀ¨½áβ¿Õ×Ö·û´®¡£
ÀýÈ磬×Ö·û´® "boo:and:foo" ²úÉú´øÓÐÏÂÃæÕâЩ±í´ïʽµÄ½á¹û£º
Regex
½á¹û
:
{ "boo", "and", "foo" }
o
{ "b", "", ":and:f" }
ÊÔÑéÖ¤Ã÷£º
String str = "boo:and:foo";
String[] tr = str.split(":");
for (String s : tr) {
System.out.println(s);
}
Êä³ö½á¹û£º
boo
and
foo
public String[] split(String regex,
in
Ïà¹ØÎĵµ£º
×÷Õß:cleverpig(×÷ÕßµÄBlog:http://blog.matrix.org.cn/page/cleverpig)
ÔÎÄ:http://www.matrix.org.cn/resource/article/44/44055_Java+Annotation+Reflect.html
¹Ø¼ü×Ö:java,annotation,reflect
ǰÑÔ£º
ÔÚÉÏÆªÎÄÕ¡¶Java AnnotationÈëÃÅ¡·ÖиÅÒªÐԵĽéÉÜÁËAnnotationµÄ¶¨Ò塢ʹÓ㬷¶Î§º¸Ç½Ï¹ã£¬µ«ÊÇÉî¶È²»¹»¡£ËùÒÔ ......
JavaÈí¼þ¿ª·¢¹æ·¶
°æ±¾ËµÃ÷
°æ±¾
×÷Õß
ÈÕÆÚ
±¸×¢
Õ÷Çó°æ
ÑîÕÂÔÆ¡¢ÌÆÃ÷ʤ
2006-09-05
Ìá³ö³õʼ°æ±¾£¬·Ö·¢¸÷Ïà¹ØÈËÔ±
ÐÞ¶©°æ
ÌÆÃ÷ʤ
2006-09-29
Õ÷Çó´ó¼ÒÒâ¼ûµÄ»ù´¡ÉÏ£¬Öƶ©µÄÐÞ¶©°æ
1.0°æ
ÌÆÃ÷ʤ
2007-09-18
×ܽáǰÆÚ¿ª·¢¾Ñ飬¶Ô¿ª·¢¹æ·¶½øÐÐÉý¼¶¡£¼Ó´Öº£ÂÌɫΪÐÞ¶©ÄÚÈÝ£¬À¶É«ÎªÐÂÔöÄÚÈÝ¡£
2.0°æ
ÌÆÃ÷ʤ ......
PHP£¬JavaºÍ.NETµÄ¹ýÈ¥£¬ÏÖÔÚºÍδÀ´
±¾ÎĶÔWeb±à³ÌÓïÑÔ½øÐÐÁËÒ»·ÌÖÂÛ£¬ÌÖÂ۵ĶÔÏóÖ÷ÒªÊÇPHP£¬JavaºÍ.NETƽ̨ÉϵÄVB.NETºÍC#¡£ÎÄÕ¶ÔËÄÖÖÓïÑÔÔÚWeb¿ª·¢ÉϵÄÌØµã½øÐÐÁ˼òÂÔµÄÃèÊö£¬²¢Ö÷ÒªÔÚÐÔÄÜ·½Ãæ½øÐÐÁ˱Ƚϡ£
¡¾51CTO¾«Ñ¡ÒëÎÄ¡¿PHP£¬JavaºÍ.NETÒѾ³ÉΪÁËδÀ´ÎåÄêÄÚ³ÌÐòÔ±±ØÐë¾ß±¸µÄ¼¼ÄÜ£¬¶øÕâÈýÖÖÓïÑÔ£¨»òÕß¿ÉÒÔ³ÆÖ®Î ......
×òÈÕÔÚÉòÑôÏû·ÀËù×ö²úÆ·Ëͼ죬¶Ô·½Ìá³öÒâ¼û£¬ÒªÇóÔÚÊó±ê»ò¼üÅÌ£¨USBµÄ£©²å°Îʱ£¬ÐëÓÐϵͳÌáʾ¡£ ÓÉÓÚJAVA×ÔÉí¶ÔÓ²¼þµÄÖ§³Ö½ÏÈõ£¬ÕÒÁ˺ܶà²ÄÁÏ£¬Î´µÃÆä¹û¡£ ÏÈ·ÅÉÏÀ´£¬¼Çϰɣ¬ÆÚ´ý¸ßÊÖÖ¸µã¡£ PS: ÓÃLIBUSB-WIN32£¬×öÁ˸ö³¢ÊÔ£¬Äܼì²â³öÊó±ê²å°ÎÁË£¬µ«ÊÇÊó±êÈ´²»ÄÜʹÓÃ~~ ......
ÏÂÃæÕâ¶Î³ÌÐòÊÇʵÏÖÁËÁ½¸ö²Ù×÷Êý¼Ó·¨µÄ²Ù×÷ÔËËã
/**
*the First Java
*@author wanglei
*@version 1.0
*/
import java.util.Scanner;
public class FirstJava{
public static void main(String[] args){
/**ÉùÃ÷Á½¸öÕûÐͱäÁ¿*/
int opA ......