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Java skills and code Articles


21: java study notes 7
Polymorphism Polymorphism (polymorphism) is also known as dynamic binding dynamic binding 『』, 『after binding late binding or run-time binding』 『』 run-time bingding. It means exactly what it should be run in a time when, according to th...

22: drag and drop java swing examples
I javaworld.com from java.sun.com and changed from the example of a file system tree, support for drag and drop, CTRL + V to copy the files import java.awt.AlphaComposite; import java.awt.Component; import java.awt.Graphics2D; import java.awt.Po...

23: Java keytool tool and how to use [zz]
Keytool is the key and certificate security management tools. It the management of a private key storage and verification of the corresponding public key associated with their chain of X.509 certificates keystore (quite a database). Keytool is a ke...

24: java applet drawing board
import java.awt .*; import javax.swing .*; import java.awt.event .*; public class HuaTu implements MouseMotionListener, ActionListener ( static final int r = 3; static int ox, oy; static int flag = 1; public static void main (String arg []) (...

25: java conversion of characters
1, converted to ASCII value of character char y = 'a'; int x = (int) y; System.out.println (x); Will be a more than the ascii value of 97 -------------------------------- 2, the decimal number into hexadecimal 16 Integer.toHexString (...

26: Java in the storage area classification
Java in the storage area is divided into 6 categories. Register, respectively (register), stack (stack), stack (heap), the static storage area (static storage), storage area constant (constant storage) as well as non-random access memory (Non-RAM). ...

27: java Tools Database Links
package spider.tools; import java.sql .*; public class DBTools ( public static final int ORACLE = 0; public static final int SQLSERVER = 1; private static String oracleDriver = "oracle.jdbc.driver.OracleDriver"; private static Strin...

28: java window to achieve
/************************************************* ********************** * Module: Caculater.java * Author: Administrator * Created: 2004-12-7 23:48:21 * Purpose: ************************************************** *********************/ packa...

29: Java Class mapping and practical tools complete source code
package com.elink.util; / * * <p> Company:software www.elingke.com </ p> * @ Author liubaojun * @ Version 1.0 * Created on 2004-11-29 * Part of the source code from elinkBSP * / import java.lang.reflect .*; import java.net .*; ...

30: Directory lists all the file name
/ * * Created on 2004-12-9 * I have not found any software used in this function, so writing this class * CD-ROM you can list the files in the txt file, to facilitate the future search, or print them out. * Do not have to find a CD-ROM in a file...

31: JavaCC installation
Installation and commissioning as a friend to help Dongdong needed JavaCC, so try using a bit. 1, JavaCC2.1 installation: (Here the assumption that you have the correct installation of Java2 JDK 1.4 or later.) JavaCC2.1 as a. Class files provided...

32: Java Network File Transfer
Range of readers: This article is a brief article entry. This article assumes that readers of Java and Java's IO system to understand the network system. Body: With regard to the question of file transfer, the actual reading and writing is al...

33: Interpretation of Java source code util.ArrayList
List interface is a variable length array to achieve. List interface to achieve all of the operation, and allow null values stored. In addition to not be synchronized, ArrayList basically the same as Vector. Vector for in almost all the methods are ...

34: Java I / O API's performance analysis
To: IO API scalability for the Web application has an extremely important significance. Java 1.4 version of the previous API, the blocking I / O so many people disappointed. J2SE 1.4 version from the beginning, Java has finally scalable I / O API. ...

35: The realization of a page using JAVA Class
Here I am a user from the user information query the table demonstrate its use as an example: 1. PageResultSet.java document will be compiled into class files, and put in your Web WEB-INF/classes/com/youngor/util application directory, you can do ...

36: Sql in java to achieve the function of select function
Sql in java to achieve the function of select function - Through a simple mechanism to achieve the target the choice of an array or collection, filtering, and sorting David Rappoport Abstract In the "filter collections" in, David Rappo...

37: Java has been a string of Unicode characters in the value of each
/ ** Java in the int type is 16 bit, char is 16 and can be expressed precisely in all types of Unicode characters So, in between characters and unicode value of the conversion, just to do the appropriate conversion char int it. * / class Unicode...

38: Java performance tests
1 Overview In the development, performance testing is designed to easily ignored the issue of the early developers in order to solve a problem of "unscrupulous", the author participated in the project has also encountered a similar proble...

39: Examples of Java user interface to explore the localization of
Internationalization is the process flexible enough to run anywhere in the world process. Internationalization of the inevitable result of the required local and - to make a program able to run the process in a particular region. This paper attempts...

40: some java coding experience and lessons
Time to regain focus on the past few days, the backup file format 388 studies, the use of the tool is NetBeans, 010 Editor, Excel. NetBeans analysis used to test the law, using java language; 010 Editor is a binary or hexadecimal form of the documen...


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