Code segment: access Cookie
Abstract: The code segment: access Cookie
</ Td> </ tr> <tr> <td height="35" valign="top" class="ArticleTeitle"> <table width="753" border="0"> <tr> <td> </ td> </ tr> </ table>
Protected void setCookie (HttpServletResponse response, String cookieName, String value) (
Cookie cookie = new Cookie (cookieName, value);
Cookie.setPath ("/");
Response.addCookie (cookie);
)
Protected Cookie getCookie (HttpServletRequest request, String name) (
Cookie [] = cookies request.getCookies ();
Cookie returnCookie = null;
If (cookies! = Null) (
For (int i = 0; i <cookies.length; i + +) (
Cookie thisCookie [i] = cookies;
If (thisCookie.getName (). Equals (name)) (
ReturnCookie = thisCookie;
Break;
)
)
)
Return returnCookie;
) </ Td> </ tr> <tr>
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String paging code
Abstract: string paging code
</ Td> </ tr> <tr> <td width="527" height="35" valign="top" class="ArticleTeitle"> use examples:
StringPager pager = new StringPager ();
Pager.setSizePerPage (5); / / characters per page
Pager.setText ( "12345678901 ");// need a long text paging
Pager.setCurrentPage (2); / / Current Page
System.out.println (pager.getTotalPage ());// total number of pages
System.out.println (pager.getCurrentPagedText pages of the current string ());//
Note: Java-based concept of the length of the string, each page is displayed in English and Chinese, as are the length of a page.
All source documents:
Package examples;
/ *
* @ (#) StringPager.java 1.00 2004-10-10
*
* Copyright 2004 All rights reserved.
* PROPRIETARY / CONFIDENTIAL. Use is subject to license terms.
* /
/ **
* StringPager, string tabs.
*
* @ Author Liuchangjiong
* @ Version 1.00 2004-10-10
* /
(Public class StringPager
/ ** Current page number * /
Private int currentPage = 1;
/ ** Paging needs of the long string * /
Private String text;
/ ** Characters per page, the default is 200 * /
Private int sizePerPage = 200;
/ ** Total number of pages * /
Private int totalPage;
Public StringPager () ()
/ **
* Return to the pages of string.
* @ Return
* /
Public String getCurrentPagedText () (
Try (
If (getCurrentPage () <getTotalPage ()) (
Return getText (). Substring ((getCurrentPage () - 1) * getSizePerPage (),
GetCurrentPage () * getSizePerPage ());
) Else if (getTotalPage ()> 0) (
Return getText (). Substring ((getCurrentPage () - 1) * getSizePerPage ());
)
) Catch (Exception e) (
E.printStackTrace ();
)
Return null;
)
/ **
* @ Return Returns the current page number.
* /
Public int getCurrentPage () (
If (currentPage <= 0) currentPage = 1;
Return currentPage;
)
/ **
* Set up the current page, from the beginning.
*
* @ Param currentPage
* The number to set the current page number.
* /
Public void setCurrentPage (int currentPage) (
If (currentPage <= 0) (
CurrentPage = 1;
)
This.currentPage = currentPage;
)
/ **
* @ Return Returns the total number of pages, if there is no data on a return.
* /
Public int getTotalPage () (
If (getText () == null) totalPage = 0;
TotalPage = (int) Math.ceil (1.0 * getText (). Length () / getSizePerPage ()) / / total number of pages
If (totalPage == 0)
TotalPage = 1;
Return totalPage;
)
/ **
* @ Param totalPage
* The totalPage to set.
* /
Public void setTotalPage (int totalPage) (
This.totalPage = totalPage;
)
Public static void main (String [] args) (
StringPager pager = new StringPager ();
Pager.setSizePerPage (5);
Pager.setText ( "12345678901");
Pager.setCurrentPage (2);
System.out.println (pager.getTotalPage ());
System.out.println (pager.getCurrentPagedText ());
)
/ **
* @ Return Returns the number of characters per page.
* /
Public int getSizePerPage () (
Return sizePerPage;
)
/ **
* @ Param sizePerPage
* The number of characters per page to set.
* /
Public void setSizePerPage (int sizePerPage) (
This.sizePerPage = sizePerPage;
)
/ **
* @ Return Returns the paging needs of the long string.
* /
Public String getText () (
Return text;
)
/ **
* @ Param text
* The need for paging long strings to set.
* /
Public void setText (String text) (
This.text = text;
)
)
Below are the jsp call: testpage.jsp (download)
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</ Td> </ tr> <tr> <td height="25" colspan="2" valign="top" class="ArticleTeitle">
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Information shows that the client code
Abstract: The information showed that the client code
</ Td> </ tr> <tr> <td width="437" height="35" valign="top" class="ArticleTeitle"> client information shows that the code, including client ip, region, operating system and browser types.
Jsp following documents: Other code download.
<% @ Page contentType = "text / html; GBK charset ="%>
<% @ Page language = "java" import = "ip .*"%>
<%
String ip = request.getRemoteAddr ();
String [] addr = IPLocalizer.search (request);
/ / String ua = request.getHeader ( "User-Agent");
/ / Out.println (ua + "
");
Out.println ( "Your IP is:" + ip + "from:" + addr [0] + addr [1 ]+","
+ OLUser.getUserSystem (request.getHeader ( "User-Agent "))+","
+ OLUser.getUserBrowser (request.getHeader ( "User-Agent ")));
%> </ Td> <td width="247" valign="top" class="ArticleTeitle">
</ Td> </ tr> <tr> <td height="25" colspan="2" valign="top" class="ArticleTeitle">
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Generate authentication code Servlet
Abstract: generate authentication code Servlet
</ Td> </ tr> <tr> <td height="35" valign="top" class="ArticleTeitle"> <table width = "100%" border = "0" cellspacing = "0" cellpadding = " 0 "> <tr> <td width="476" height="86" align="center" valign="top">
Servlet generate authentication code, and Figure:
/ / Fig. 5.6_02: ImageCodeMakerServlet.java / / read image files and generate the code of Servlet package com.fatcat.webchart; import javax.servlet .*; import javax.servlet.http .*; import java.io. *; import java.util .*; import java.awt.image .*; import java.awt .*; import javax.imageio .*; public class ImageCodeMakerServlet extends HttpServlet (String codeNumbers = ""; int width = 240, height = 60; / / HTTP get requests public void doGet (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException (/ / empty buffer response.reset (); / / MIME type of attention here response.setContentType ( "image / png "); / / Set the page does not cache response.setHeader (" Pragma "," No-cache "); response.setHeader (" Cache-Control "," no-cache "); response.setDateHeader (" Expires ", 0) / / create a 240 X60 Image BufferedImage image = new BufferedImage (width, height, BufferedImage.TYPE_INT_RGB); / / graphics environment be targeted g Graphics g = image.getGraphics (); / / fill background g.setColor (Color.WHITE); g.fillRect (0, 0, width, height); for (int i = 0; i <4; i + +) (drawCode (g, i, request);) / / drawNoise (g, 30 ); / / Draw borders g.setColor (Color.black); g.drawRect (0, 0, width - 1, height - 1) / / Save the code into session in the HttpSession session = request.getSession (true ); session.setAttribute ( "codeNumbers" codeNumbers); / / Reset codeNumbers string = "" / / write use ImageIO category of image coding method ServletOutputStream sos = response.getOutputStream (); ImageIO.write (image , "PNG" sos); sos.close ();) / / loading image files and the mapping of the code public void drawCode (Graphics graphics, int i, HttpServletRequest request) (int number = (int) (Math.random ( ) * 10); String imageFilePath =
Request.getRealPath ( "\ \ images \ \" + + number. "Gif"; File imageFile = new File (imageFilePath); Image gifFile = null; try gifFile = (ImageIO.read (imageFile);) catch (Exception e) (System.out.println (e);) graphics.drawImage (gifFile, i * 60, 0, null); codeNumbers + = number;) / / Line Drawing interference public void drawNoise (Graphics graphics, int lineNumber) (graphics. setColor (Color.YELLOW) for (int i = 0; i <lineNumber; i + +) (int pointX1 = 1 + (int) (Math.random () * width); int pointY1 = 1 + (int) (Math. random () * height); int pointX2 = 1 + (int) (Math.random () * width); int pointY2 = 1 + (int) (Math.random () * height); graphics.drawLine (pointX1, pointY1 , pointX2, pointY2);)) / / HTTP post request, and the same public void doPost doGet (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException (doGet (request, response);)) /******* ************************************************** ***************** * (C) Copyright 2004-2005 by Jingkui Zhong (Beijing Zhong Kui) and Huan Tang (Tanghuan) * All Rights Reserved. * * * * DISCLAIMER: The authors of this code have used their * * best efforts in preparing the code. These efforts include the * * development, research, and testing of the theories and programs * * to determine their effectiveness. The authors and publisher make * * no warranty of any kind, expressed or implied, with regard to these * * programs or to the documentation contained in these codes. The authors * * shall not be liable in any event for incidental or consequential * * damages in connection with, or arising out of, and the furnishing, * * performance, or use of these programs. * The following ******************************************/
Please download other documents.
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His code procedures
Abstract: his code procedures
</ Td> </ tr> <tr> <td width="489" height="35" valign="top" class="ArticleTeitle"> procedure code below his output java runtime environment attributes, and help us to analyse some procedural issues:
If the file separators, the default file encoding format.
(Public class TestProperties
Public static void main (String [] args) (
System.getProperties (). List (System.out);
)
)
In the output on my machine:
C: \ java> javac TestProperties.java
C: \ java> java TestProperties
— Listing properties –
Java.runtime.name = Java (TM) 2 Runtime Environment, Stand …
Sun.boot.library.path = C: \ Program Files \ Java \ j2re1.4.2_03 \ bin
Java.vm.version = 1.4.2_03-b02
Java.vm.vendor = Sun Microsystems Inc.
Java.vendor.url = http://java.sun.com/
Path.separator =;
Java.vm.name = Java HotSpot (TM) Client VM
File.encoding.pkg = sun.io
User.country = CN
Sun.os.patch.level = Service Pack 1
Java.vm.specification.name = Java Virtual Machine Specification
User.dir = C: \ java
Java.runtime.version = 1.4.2_03-b02
Java.awt.graphicsenv = sun.awt.Win32GraphicsEnvironment
Java.endorsed.dirs = C: \ Program Files \ Java \ j2re1.4.2_03 \ li …
Os.arch x86 =
Java.io.tmpdir = C: \ DOCUME ~ 1 \ cwb \ LOCALS ~ 1 \ Temp \
Line.separator =
Java.vm.specification.vendor = Sun Microsystems Inc.
User.variant =
Os.name = Windows XP
Sun.java2d.fontpath =
Java.library.path = C: \ WINDOWS \ system32;. C: \ WINDOWS \ Syst …
Java.specification.name = Java Platform API Specification
Java.class.version = 48.0
Java.util.prefs.PreferencesFactory = java.util.prefs.WindowsPreferencesFac …
Os.version = 5.1
User.home = C: \ Documents and Settings \ cwb
User.timezone =
Java.awt.printerjob = sun.awt.windows.WPrinterJob
File.encoding = GBK
Java.specification.version = 1.4
User.name = cwb
Java.class.path = d: \ j2sdk1.4.2 \ lib; c: \ j2ee1.3.1 \ lib \ j2 …
Java.vm.specification.version = 1.0
Sun.arch.data.model = 32
Java.home = C: \ Program Files \ Java \ j2re1.4.2_03
Java.specification.vendor = Sun Microsystems Inc.
User.language = zh
Awt.toolkit = sun.awt.windows.WToolkit
Java.vm.info mixed mode =
Java.version = 1.4.2_03
Java.ext.dirs = C: \ Program Files \ Java \ j2re1.4.2_03 \ li …
Sun.boot.class.path = C: \ Program Files \ Java \ j2re1.4.2_03 \ li …
Java.vendor = Sun Microsystems Inc.
File.separator = \
Java.vendor.url.bug = http://java.sun.com/cgi-bin/bugreport …
Sun.cpu.endian little =
Sun.io.unicode.encoding = UnicodeLittle
Sun.cpu.isalist = pentium i486 i386
C: \ java> </ td> <td width="195" valign="top" class="ArticleTeitle">
</ Td> </ tr> <tr> <td height="25" colspan="2" valign="top" class="ArticleTeitle">
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With a few lines of code to achieve sort
Abstract: A few lines of code to sort
</ Td> </ tr> <tr> <td height="35" valign="top" class="ArticleTeitle">
<table Width="680" border="0"> <tr> <td width="394"> [original]
Abstract: Some people still take the trouble often see the use of the edge (the most common!) Or exchanged do sort, in fact with a few lines of code can be faster to achieve good sort, regardless of type or category is simple, Java array or Collection (Collection).
Simple types of sort
Simple types are no more than byte, char, short, int, long, float, double, and other data types, these types can not concentrate on only the use of the array. Java.util.Arrays methods provide these types of sort of way (in fact there are many other useful method), the following is a simple sort int array:
Int arr [] = (2, 3, 1,10,7,4); </ td> <td width="276" align="center"> </ td> </ tr> </ table>
System.out.print ( "before sort:");
For (int i = 0; i <arr.length; i + +)
System.out.print (arr [i] + "");
System.out.println ();
Arrays.sort (arr);
System.out.print ( "after sort:");
For (int i = 0; i <arr.length; i + +)
System.out.print (arr [i] + "");
System.out.println ();
Output:
Before sort: 2 3 1 10 7 4
After sort: 1 2 3 4 7 10
We have seen the results in accordance with the order of ascending, and so are the following sort.
Object sort
Objects can be placed on the array, the same call Arrays.sort (Object [] arr) may It can also be put in the set, with the java.util.Collections
Sort (List list).
But this must implement the java.lang.Comparable interface. There is only one way this interface: int compartTo (Object o)
When the object than the object of the introduction, returns a positive integer. Programmer to class as an example:
Class Programmer implements Comparable (
Private String name;
Private String language;
Private double pay;
Public Programmer (String name, String language, double pay) (
This.name = name;
This.language = language;
This.pay = pay;
)
Public int compareTo (Object o) (
Programmer other = (Programmer) o;
Return (int) pay - (int) other.pay;
)
Public String toString () (
Return "(name:" + name + "language:" + + language, "money:" + pay + ")";
)
)
Its sort:
ArrayList list = new ArrayList ();
List.add (new Programmer ( "San", "C", 12000));
List.add (new Programmer ( "Si" and "Java", 200));
List.add (new Programmer ( "Wang 5", "C + +", 5000));
List.add (new Programmer ( "money 6", "VB", 3000));
System.out.println ( "before sort:" + list);
Collections.sort (list);
System.out.println ( "after sort:" + list);
Output:
Before sort: [(name: Zhang, language: C, money: 12000.0), (name: Paul Lee, language: Java, money: 200.0)
(Name: Wang 5, language: C + +, money: 5000.0), (name: money 6. Language: VB, money: 3000.0)]
After sort: [(name: Paul Lee, language: Java, money: 200.0), (name: money 6. Language: VB, money: 3000.0),
(Name: Wang 5, language: C + +, money: 5000.0), (name: Zhang, language: C, money: 12000.0)]
Simple enough! Comparable can look up the javadoc know that there are many types of the interface has been achieved, such as the sequencing of these few lines of code can get.
Recently see C # System.Array.sort found to sort the array, applicable to all to achieve the target of the IComparable interface, it seems that Microsoft's ability to draw is really strong ah!
Have the sort of
The above method, there is one question that has been in existence for a class, and did not realize Comparable interface, the use of a subset of a package?
Very troublesome (you can try the following example). There is also a situation that is impossible to achieve on a variety of categories to sort. To File Class as an example, it implements the Comparable interface,
However, in accordance with the sort of name. If we sort according to size, or by modification time to sort? In both cases, the use of java.util package Comparator interface:
Arrays.sort (Object [] arr, Comparator com)
Collections.sort (Object [] arr, Comparator com)
Comparator interface:
Public int compare (Object o1, Object o2) When o1 than o2 large return a positive integer
Public boolean equals (Object obj) to determine whether the obj and the Comparator with an object
Below use Comparator achieved according to the document file size or modified sort:
(Class FileUtils
Static class CompratorByLastModified implements Comparator (
Public int compare (Object o1, Object o2) (
File file1 = (File) o1;
File file2 = (File) o2;
File1.lastModified long diff = () - file2.lastModified ();
If (diff> 0)
Return 1;
Else if (diff == 0)
Return 0;
Else
Return -1;
)
Public boolean equals (Object obj) (
Return true; / / simple approach
)
)
Static class CompratorBySize implements Comparator (
Public int compare (Object o1, Object o2) (
File file1 = (File) o1;
File file2 = (File) o2;
File1.length long diff = () - file2.length ();
If (diff> 0)
Return 1;
Else if (diff == 0)
Return 0;
Else
Return -1;
)
Public boolean equals (Object obj) (
Return true; / / simple approach
)
)
)
Call examples:
File dir = new File ( "C: \ \ temp");
File = [] files dir.listFiles ();
System.out.print ( "before sort:");
For (int i = 0; i <files.length; i + +)
System.out.print (files [i] + "");
System.out.println ();
Arrays.sort (files);
System.out.print ( "sort by name:");
For (int i = 0; i <files.length; i + +)
System.out.print (files [i] + "");
System.out.println ();
Arrays.sort (files, new FileUtils.CompratorBySize ());
System.out.print ( "sort by size:");
For (int i = 0; i <files.length; i + +)
System.out.print (files [i] + "");
System.out.println ();
Arrays.sort (files, new FileUtils.CompratorByLastModified ());
System.out.print ( "sort by last modified:");
For (int i = 0; i <files.length; i + +)
System.out.print (files [i] + "");
System.out.println ();
Try to find its own directory of it. Java class libraries in the use of these methods, under normal circumstances is not to write a Sorting Algorithm?
Finally attached layout complete code of points:
Import java.io. *;
Import java.util .*;
(Public class TestSort
Public static void main (String [] args) (
SortSimpleType ();
SortComparable ();
SortComparator ();
)
Public static void sortSimpleType () (
Int arr [] = (2, 3, 1,10,7,4);
System.out.print ( "before sort:");
For (int i = 0; i <arr.length; i + +)
System.out.print (arr [i] + "");
System.out.println ();
Arrays.sort (arr);
System.out.print ( "after sort:");
For (int i = 0; i <arr.length; i + +)
System.out.print (arr [i] + "");
System.out.println ();
)
Public static void sortComparable () (
ArrayList list = new ArrayList ();
List.add (new Programmer ( "San", "C", 12000));
List.add (new Programmer ( "Si" and "Java", 200));
List.add (new Programmer ( "Wang 5", "C + +", 5000));
List.add (new Programmer ( "money 6", "VB", 3000));
System.out.println ( "before sort:" + list);
Collections.sort (list);
System.out.println ( "after sort:" + list);
)
Public static void sortComparator () (
File dir = new File ( "C: \ \ java");
File = [] files dir.listFiles ();
System.out.print ( "before sort:");
For (int i = 0; i <files.length; i + +)
System.out.println (files [i] + "");
System.out.println ();
Arrays.sort (files);
System.out.print ( "sort by name:");
For (int i = 0; i <files.length; i + +)
System.out.println (files [i] + "");
System.out.println ();
Arrays.sort (files, new FileUtils.CompratorBySize ());
System.out.print ( "sort by size:");
For (int i = 0; i <files.length; i + +)
System.out.println (files [i] + "");
System.out.println ();
Arrays.sort (files, new FileUtils.CompratorByLastModified ());
System.out.print ( "sort by last modified:");
For (int i = 0; i <files.length; i + +)
System.out.println (files [i] + "");
System.out.println ();
)
)
Class Programmer implements Comparable (
Private String name;
Private String language;
Private double pay;
Public Programmer (String name, String language, double pay) (
This.name = name;
This.language = language;
This.pay = pay;
)
Public int compareTo (Object o) (
Programmer other = (Programmer) o;
Return (int) pay - (int) other.pay;
)
Public String toString () (
Return "(name:" + name + "language:" + + language, "money:" + pay + ")";
)
)
(Class FileUtils
Static class CompratorByLastModified implements Comparator (
Public int compare (Object o1, Object o2) (
File file1 = (File) o1;
File file2 = (File) o2;
File1.lastModified long diff = () - file2.lastModified ();
If (diff> 0)
Return 1;
Else if (diff == 0)
Return 0;
Else
Return -1;
)
Public boolean equals (Object obj) (
Return true; / / simple approach
)
)
Static class CompratorBySize implements Comparator (
Public int compare (Object o1, Object o2) (
File file1 = (File) o1;
File file2 = (File) o2;
File1.length long diff = () - file2.length ();
If (diff> 0)
Return 1;
Else if (diff == 0)
Return 0;
Else
Return -1;
)
Public boolean equals (Object obj) (
Return true; / / simple approach
)
)
)
The result:
C: \ java> java TestSort
Before sort: 2 3 1 10 7 4
After sort: 1 2 3 4 7 10
Before sort: [(name: Zhang, language: C, money: 12000.0), (name: Paul Lee, language:
Java, money: 200.0), (name: Wang 5, language: C + +, money: 5000.0), (name: money 6. Language: VB, money: 3000.0)]
After sort: [(name: Paul Lee, language: Java, money: 200.0), (name: money 6. Language:
VB, money: 3000.0), (name: Wang 5, language: C + +, money: 5000.0), (name: Zhang, language: C, money: 12000.0)]
Before sort: C: \ java \ class.bat
C: \ java \ onlyfun
C: \ java \ build.xml
C: \ java \ 1.txt
C: \ java \ native.bat
C: \ java \ hib.bat
C: \ java \ hjar
C: \ java \ src
C: \ java \ xdoclet
C: \ java \ lib2
C: \ java \ jsf.bat
C: \ java \ struts.bat
C: \ java \ TestSort.java
C: \ java \ TestSort.class
C: \ java \ jar
C: \ java \ messages_zh_TW1.properties
C: \ java \ messages.properties
C: \ java \ messages_zh_TW.properties
C: \ java \ Programmer.class
C: \ java \ FileUtils $ CompratorByLastModified.class
C: \ java \ FileUtils $ CompratorBySize.class
C: \ java \ FileUtils.class
C: \ java \ lib
C: \ java \ bean.xml
Sort by name: C: \ java \ 1.txt
C: \ java \ bean.xml
C: \ java \ build.xml
C: \ java \ class.bat
C: \ java \ FileUtils $ CompratorByLastModified.class
C: \ java \ FileUtils $ CompratorBySize.class
C: \ java \ FileUtils.class
C: \ java \ hib.bat
C: \ java \ hjar
C: \ java \ jar
C: \ java \ jsf.bat
C: \ java \ lib
C: \ java \ lib2
C: \ java \ messages.properties
C: \ java \ messages_zh_TW.properties
C: \ java \ messages_zh_TW1.properties
C: \ java \ native.bat
C: \ java \ onlyfun
C: \ java \ Programmer.class
C: \ java \ src
C: \ java \ struts.bat
C: \ java \ TestSort.class
C: \ java \ TestSort.java
C: \ java \ xdoclet
Sort by size: C: \ java \ hjar
C: \ java \ jar
C: \ java \ lib
C: \ java \ lib2
C: \ java \ onlyfun
C: \ java \ src
C: \ java \ xdoclet
C: \ java \ 1.txt
C: \ java \ native.bat
C: \ java \ jsf.bat
C: \ java \ struts.bat
C: \ java \ class.bat
C: \ java \ FileUtils.class
C: \ java \ hib.bat
C: \ java \ messages.properties
C: \ java \ FileUtils $ CompratorBySize.class
C: \ java \ FileUtils $ CompratorByLastModified.class
C: \ java \ bean.xml
C: \ java \ Programmer.class
C: \ java \ messages_zh_TW.properties
C: \ java \ messages_zh_TW1.properties
C: \ java \ build.xml
C: \ java \ TestSort.class
C: \ java \ TestSort.java
Sort by last modified: C: \ java \ lib
C: \ java \ jar
C: \ java \ hjar
C: \ java \ onlyfun
C: \ java \ 1.txt
C: \ java \ hib.bat
C: \ java \ src
C: \ java \ xdoclet
C: \ java \ build.xml
C: \ java \ lib2
C: \ java \ bean.xml
C: \ java \ class.bat
C: \ java \ struts.bat
C: \ java \ messages.properties
C: \ java \ messages_zh_TW1.properties
C: \ java \ messages_zh_TW.properties
C: \ java \ jsf.bat
C: \ java \ native.bat
C: \ java \ TestSort.java
C: \ java \ FileUtils.class
C: \ java \ FileUtils $ CompratorBySize.class
C: \ java \ FileUtils $ CompratorByLastModified.class
C: \ java \ Programmer.class
C: \ java \ TestSort.class
C: \ java>
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Quanbing Chinese characters into the JAVA program source code.
Abstract: Quanbing Chinese characters into the JAVA program source code.
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Quanbing Chinese characters into the JAVA program source code.
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Java prepared by the simple download manager (with source code)
Abstract: java prepared by the simple download manager (with source code)
</ Td> </ tr> <tr> <td height="35" valign="top" class="ArticleTeitle"> simple download tools, GUI interface, it can download more than one file, and report downloaded bytes few, download progress and completion percentage download status. Xuchuan breakpoint support, to suspend, resume, cancel the download tasks.
This source of four documents: Download.java, DownloadManager.java, DownloadsTableModel.java, ProgressRenderer.java.
Commencement of the proceedings:
C: \ ja> javac *. java
C: \ ja> java DownloadManager
<table Width="731" border="0"> <tr> <td> </ td> </ tr> </ table>
Function TempSave (ElementID) (CommentsPersistDiv.setAttribute ( "CommentContent" document.getElementById (ElementID). Value); CommentsPersistDiv.save ( "CommentXMLStore");) function Restore (ElementID) (CommentsPersistDiv.load ( "CommentXMLStore"); document . getElementById (ElementID). CommentsPersistDiv.getAttribute value = ( "CommentContent");) </ td> </ tr> <tr>
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A BASIC language interpreter (with source code)
Abstract: A BASIC language interpreter (with source code)
</ Td> </ tr> <tr> <td width="470" height="35" valign="top" class="ArticleTeitle"> This is a java with a simple preparation of the BASIC language interpreter, only explain the following keywords: ↑ Back Abstract: a simple web browser source code - Source <link> Href ="../../ css / index.css "rel =" stylesheet "type =" text / css "> </ head> function valiform () (if (document.form2.keyword.value = =""){ alert ( "Please enter keywords!"); document.form2.keyword.focus (); return false;)) function valiform1 () (if (document.form5.pinjianame.value =="") (alert ( "Please enter names!"); document.form5.pinjianame.focus (); return false;) if (document.form5.pinjiacontent.value ==""){ alert ( "Please enter evaluation of the content!") ; document.form5.pinjiacontent.focus (); return false;)) <body bgcolor="#FFFFFF" background="../../images/background.gif" leftmargin="0" topmargin="0"> <table width="756" height="1146" border="0" align="center" cellpadding="0" cellspacing="0" bgcolor="#FFFFFF" class="LTR"> <tr> <td width = "754" height = "78"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width = "19%" height = "65" > </ td> <td width="81%"> <table width = "94%" height = "53" border = "0" align = "center" cellpadding = "0" cellspacing = "0" class = " LTR "> <tr> <td height="53">
PRINT INPUT IF THEN FOR NEXT
TO GOTO GOSUB RETURN END
Support digital, variable (A to Z), the operator (+-*/^=()<>>=<=<>), See Demo:
(Class SBDemo
Public static void main (String args [])
(
If (args.length! = 1) (
System.out.println ( "Usage: sbasic
Return;
)
Try (
SBasic ob = new SBasic (args [0]) / / input from the command line BASIC language source of
File name
Ob.run (); / / explain operation
) Catch (InterpreterException exc) (
System.out.println (exc);
)
)
)
Run:
C: \ java> java SBDemo TEST2.BAS
This program demonstrates nested GOSUBs.
Enter a number: 9
9.0 18.0 27.0 36.0 45.0 54.0 63.0 72.0 81.0
C: \ java>
Below are the BASIC language source: TEST2.BAS
PRINT "This program demonstrates nested GOSUBs."
INPUT "enter a number:" I
GOSUB 100
END
100 FOR T = 1 TO I
X = X + I
GOSUB 150
NEXT
RETURN
150 PRINT X;
RETURN function TempSave (ElementID) (CommentsPersistDiv.setAttribute ( "CommentContent" document.getElementById (ElementID). Value); CommentsPersistDiv.save ( "CommentXMLStore");) function Restore (ElementID) (CommentsPersistDiv.load ( "CommentXMLStore"); document.getElementById (ElementID). CommentsPersistDiv.getAttribute value = ( "CommentContent");) </ td> <td width="214" valign="top" class="ArticleTeitle">
</ Td> </ tr> <tr> <td height="25" colspan="2" valign="top" class="ArticleTeitle">
A simple web browser source code