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

JAVA ѧϰ

ΪÁ˰Ñѧµ½ÖªÊ¶×ܽáÆðÀ´£¬ÌØ¿ª´ËÎÄ¡£Ö÷ÒªÊǰÑÿÌìѧµ½µÄ¶«Î÷¼ÓÒԼǼ£¬²»ÖÁÓÚ±ä³É´ó¹·ÐÜ¡£
20100310
½ñÌìÔÚÂÛ̳¿´ÈË·¢ÁËÁ½µÀjavaÌ⣬²»´í£¬°ÑÎÊÌâºÍ´ð°¸¶¼¼Ó½øÀ´£¬ÒÔ±ãÒÔºó²Î¿¼¡£
ÎÊÌâ:
ÒªÇóʵÏÖ·½·¨ÀïÃæµÄ´úÂ룺
1. function1()
  ·µ»ØÏàͬ闊¶È數×ÖÐÍ×Ö´®. Àý:
  function1(“000000”) => “000001”
  function1(”0023")  => “0024”
  function1(“0009”)  => “0010”
  function1(“000099”) => “000100”
  function1(“9”) => “0” //號碼Ñ­環ÔÙÓÃ
  ³Ìʽ½Ó¿Ú:
  public static String function1(String num){....}
2. function2()
  將數×ÖËÄ捨ÎåÈëÖÁijС數λ, 並·µ»ØÖ¸¶¨Î»數×Ö´®
  function2(123.455,2) => 123.46
  function2(123.449,2) => 123.45
  function2(123.44,3) => 123.440 
  function2(123.4455,3) => 123.446
  function2(123.4499,3) => 123.450
  function2(123.9,0) => 124
  ³Ìʽ½Ó¿Ú:
  public static double function2(double value,int decimalPlaces){....}
-------------------------------------------------------------------------------------
´ð°¸£º
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.RoundingMode;
import java.text.NumberFormat;
public class test {
 public String function1(String str){
  String rstr="";
  int snum = Integer.parseInt(str);
  int len =str.length();
  snum++;
  rstr =String.format("%0"+len+"d",(int)(snum % Math.pow(10,len)));
  return rstr;
 }
 public double function2(double value, int decimalPlaces) {
     NumberFormat nf = NumberFormat.getNumberInstance();
     nf.setRoundingMode(RoundingMode.HALF_UP); // ËÄÉáÎåÈë
     nf.setMax


Ïà¹ØÎĵµ£º

JAVAÕýÔò±í´ïʽ PatternºÍMatcher

JAVAÕýÔò±í´ïʽ--PatternºÍMatcher
×÷Õߣº³Â¹ã¼Ñ    ÎÄÕÂÀ´Ô´£ºwww.fooldock.com
·¢²¼ÈÕÆÚ£º2004Äê11ÔÂ19ÈÕ    ä¯ÀÀ´ÎÊý£º2585´Î
ÏÖÔÚJDK1.4ÀïÖÕÓÚÓÐÁË×Ô¼ºµÄÕýÔò±í´ïʽAPI°ü£¬JAVA³ÌÐòÔ±¿ÉÒÔÃâÈ¥ÕÒµÚÈý·½ÌṩµÄÕýÔò±í´ïʽ¿âµÄÖÜÕÛÁË£¬ÎÒÃÇÏÖÔÚ¾ÍÂíÉÏÀ´Á˽âÒ»ÏÂÕâ¸öSUNÌṩµÄ³Ù ......

java HttpClient PostʵÀý

private void postMethod(String url) throws IOException
 {    
  url = "http://www.newsmth.net/bbslogin2.php";
  PostMethod postMethod = new PostMethod(url);
  // ÌîÈë¸÷¸ö±íµ¥ÓòµÄÖµ
  NameValuePair[] data = { new NameValuePair("id ......

Óà javaµ÷ÓÃoracle´æ´¢¹ý³Ì×ܽá

1¡¢Ê²Ã´ÊÇ´æ´¢¹ý³Ì¡£´æ´¢¹ý³ÌÊÇÊý¾Ý¿â·þÎñÆ÷¶ËµÄÒ»¶Î³ÌÐò£¬ËüÓÐÁ½ÖÖÀàÐÍ¡£Ò»ÖÖÀàËÆÓÚSELECT²éѯ£¬ÓÃÓÚ¼ìË÷Êý¾Ý£¬¼ìË÷µ½µÄÊý¾ÝÄܹ»ÒÔÊý¾Ý¼¯µÄÐÎʽ·µ
»Ø¸ø¿Í»§¡£ÁíÒ»ÖÖÀàËÆÓÚINSERT»òDELETE²éѯ£¬Ëü²»·µ»ØÊý¾Ý£¬Ö»ÊÇÖ´ÐÐÒ»¸ö¶¯×÷¡£ÓеķþÎñÆ÷ÔÊÐíͬһ¸ö´æ´¢¹ý³Ì¼È¿ÉÒÔ·µ»ØÊý¾ÝÓÖ¿ÉÒÔÖ´Ðж¯×÷¡£
2¡¢Ê²Ã´Ê±ºòÐèÒªÓô洢¹ý³Ì
......

java¶ÁÈ¡ÎļþÄÚÈÝ£¨ÖÐÎÄÎļþ½â¾ö°ì·¨£©

ÖÚËùÖÜÖª£¬javaµÄÖÐÎÄÎÊÌâÒ»Ö±ÊÇÒ»¸öÀÏ´óÄѵÄÎÊÌ⣬Õâ¸öÏÖÏó¿ÉÒÔÔÚcsdnÖÐjavaÂÛ̳Àï¹ØÓÚÖÐÎÄÂÒÂëµÄÌáÎÊÂʾͿÉÒÔÁ˽⵽£¬ÉõÖÁÈí¼þ¾ÞÈËIBMרÃÅ¿ª±ÙÁËÒ»¸ö½â¾öÖÐÎÄÎÊÌâµÄ×¨Çø£¬×÷Ϊһ¸öË×ÈË£¨Ò»Ö±ÃÎÏëÏ£ÍûÏë½ð¿­ÀûÄÇÑù³ÉΪһ¸ö“Ã°ÅÆÌìÉñ”£¬Ö»ÊÇһֱûÓгɹ¦£¬Ò²ÐíÊÇÒòΪÉϵ۲»ÕÕ¹ËÖйú°É£©£¬ÎÒҲΪͬÒâµÄÎÊÌâÀ§ÈÅ£ ......

Java ÆÁÄ»½ØÈ¡³ÌÐò

import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
import java.io.File;
public class captureScreen{
public captureScreen(String fileName) throws Exception
{
......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ