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

JAVAÅжÏ×Ö·û´®ÊÇ·ñΪÊý×Ö

StringתCharacterÊý×飬ÓÃCharacterµÄisDigitºÍisLetterº¯ÊýÈ¥Åжϡ£
public static boolean isNumeric(String str) {
for (int i = str.length(); i = 0;) {
if (!Character.isDigit(str.charAt(i))) {
return false;
}
}
return true;
}
public static boolean isNumeric(String str) {
Pattern pattern = Pattern.compile("[0-9]*");
return pattern.matcher(str).matches();
}
public static boolean isNumeric(String str) {
if (str.matches("““d*")) {
return true;
}
return false;
}
public static boolean isNumeric(String str) {
for (int i = str.length(); i = 0;) {
int chr = str.charAt(i);
if (chr 48chr 57)
return false;
}
return true;
}


Ïà¹ØÎĵµ£º

java´¦Àíwin word¡¢excelµÄ²»Í¬·½Ê½

      http://danadler.com/jacob/
¡¡¡¡http://jakarta.apache.org/poi/
¡¡¡¡http://www.onjava.com/pub/a/onjava/2003/01/22/poi.html
¡¡¡¡http://www.csdn.net/develop/article/15/15311.shtm
¡¡¡¡http://forum.java.sun.com/thread.jsp?forum=40&thread=382666&tstart=0&trang ......

JAVAÖÐתÒå×Ö·û


1.°Ë½øÖÆ×ªÒåÐòÁУº\ + 1µ½3λ5Êý×Ö£»·¶Î§'\000'~'\377'
      \0£º¿Õ×Ö·û
2.UnicodeתÒå×Ö·û£º\u + ËĸöÊ®Áù½øÖÆÊý×Ö£»0~65535
     \u0000£º¿Õ×Ö·û
3.ÌØÊâ×Ö·û£º¾Í3¸ö
      \"£ºË«ÒýºÅ
     \'£ºµ¥ÒýºÅ
 &nbs ......

java »ù±¾µÄio²Ù×÷

×ªÔØ£º
±¾ÎÄÀ´×ÔCSDN²©¿Í£¬×ªÔØÇë±êÃ÷³ö´¦£ºhttp://blog.csdn.net/xuchanghao/archive/2009/01/16/3796276.aspx
Ò»¡¢¶àÖÖ·½Ê½¶ÁÎļþÄÚÈÝ¡£
1¡¢°´×Ö½Ú¶ÁÈ¡ÎļþÄÚÈÝ
2¡¢°´×Ö·û¶ÁÈ¡ÎļþÄÚÈÝ
3¡¢°´ÐжÁÈ¡ÎļþÄÚÈÝ
4¡¢Ëæ»ú¶ÁÈ¡ÎļþÄÚÈÝ
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputS ......

java IO²Ù×÷ (¶Áд¡¢×·¼Ó¡¢É¾³ý¡¢Òƶ¯¡¢¸´ÖƵÈ)


Ò»¡¢¶àÖÖ·½Ê½¶ÁÎļþÄÚÈÝ¡£
1¡¢°´×Ö½Ú¶ÁÈ¡ÎļþÄÚÈÝ
2¡¢°´×Ö·û¶ÁÈ¡ÎļþÄÚÈÝ
3¡¢°´ÐжÁÈ¡ÎļþÄÚÈÝ
4¡¢Ëæ»ú¶ÁÈ¡ÎļþÄÚÈÝ
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java ......

javaÖÐÊý×éÓëListÏ໥ת»»µÄ·½·¨

1.Listת»»³ÉΪÊý×é¡££¨ÕâÀïµÄListÊÇʵÌåÊÇArrayList)
¡¡¡¡µ÷ÓÃArrayListµÄtoArray·½·¨¡£
¡¡¡¡toArray
¡¡¡¡public <T> T[] toArray(T[] a)·µ»ØÒ»¸ö°´ÕÕÕýÈ·µÄ˳Ðò°üº¬´ËÁбíÖÐËùÓÐÔªËØµÄÊý×飻·µ»ØÊý×éµÄÔËÐÐʱÀàÐ;ÍÊÇÖ¸¶¨Êý×éµÄÔËÐÐʱÀàÐÍ¡£Èç¹ûÁбíÄÜ·ÅÈëÖ¸¶¨µÄÊý×飬Ôò·µ»Ø·ÅÈë´ËÁбíÔªËØµÄÊý×é¡£·ñÔò£¬½«¸ù¾ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ