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Created by Dr. Xi on November 11, 2011 10:05:22
Last update: November 11, 2011 10:12:01
This is an HTML image tag filter using Java regex. It takes a string, finds the img tags, replaces the src attribute with one provided by the filter, then adds a class name to the class attribute.
import java.util.regex.*;
import java.io.*;
...
Test file:
<div id="HTML snippet">
<img src="img/big/txt-m...
Created by alfa on June 07, 2011 11:34:26
Last update: June 07, 2011 11:36:37
This is an example that uses dynamic proxies to trace method calls (in logging) and print out elapsed times for them. Because dynamic proxies can only be generated for interfaces, the service classes must be implemented with interface-implementation pairs. Create services A and B. A.java :
public interface A { public void service1()... AImpl.java : import java.util.Random; public class AImpl... B.java : public interface B { public void service1()... BImpl.java : public class BImpl implements B { public vo... The call trace proxy: import java.lang.reflect.*; class TraceProx... The performance proxy: import java.lang.reflect.*; class Performan... The service factory: import java.lang.reflect.*; public class Se... The test class: public class Test { public static void main... The output: Entering AImpl.service1 Entering BImpl.service1... The above example has no information...
Created by alfa on May 24, 2011 13:51:15
Last update: May 24, 2011 13:52:14
public static String capitalize(String s) {
...
Created by Dr. Xi on January 14, 2010 00:28:27
Last update: March 30, 2011 15:37:44
A task that a Java developer does so frequently is to find out where a certain class can be found - to resolve compilation errors, classpath issues, or version conflicts of the same class introduced by multiple class loaders. A long while back I wrote a simple Perl script to perform the task. Later I was informed that there are Swing based Jar Browser and Jars Browser . Then, there are a couple of shell one-liners:
# one liner 1 find -name "*.jar" -print0 | xarg... But all of them share the same problem: if a class is in a jar nested in another jar, it cannot be found. Such is the case for a class inside a jar under the WEB-INF/lib directory of a...
Created by Dr. Xi on October 16, 2008 20:45:40
Last update: March 28, 2011 20:23:22
Java's built-in classes are way too complex/flexible for a simple protocol like HTTP. This is a wrapper to simplify HTTP GET and POST.
import java.io.*;
import java.net.*;
imp...
A simple test:
import java.io.*;
import java.util.*;
...
Created by Captain on November 22, 2010 04:34:37
Last update: March 05, 2011 20:42:17
<!DOCTYPE html>
<html>
<head>
<style ...
Reference:
Custom Resolutions on Intel Graphics
Created by Dr. Xi on September 11, 2008 22:55:01
Last update: January 11, 2011 19:48:19
<html>
<head>
<script language="JavaScript">...
Created by Dr. Xi on November 29, 2010 13:08:05
Last update: November 30, 2010 08:51:34
This sample code sets up a server socket on a specified address and port. I use it to test port binding conflicts.
import java.net.*;
public class SocketBind ...
Note: " netstat -ano " also gives you information on active TCP connections, including listening ports. But there are cases where netstat reports nothing and bind still fails.
Created by Fang on March 23, 2010 01:43:47
Last update: September 03, 2010 14:21:15
This is a bare bones, no frills, just the facts tutorial on JSTL. I will not bother you with theories, principles, best practices, anecdotes, or any other junk, because JSTL is shallow and simple, and I don't want to make it sound deep or complex. Getting ready JSTL/JSP Expression Language JSTL implicit variables A simple test application for JSTL Expanding the simple JSTL test application Core Tags Basic tags : <c:out> , <c:set> , <c:remove> , <c:catch> Flow control tags : <c:if> , <c:choose> , <c:when> , <c:otherwise> , <c:forEach> , <c:forTokens> URL Tags : <c:import> , <c:url> , <c:redirect> , <c:param> Internationalization (i18n) and formatting tags I18N Overview Set locale : <fmt:setLocale> , <fmt:requestEncoding> Format messages : <fmt:message> , <fmt:bundle> , <fmt:setBundle> , <fmt:param>...
Created by Dr. Xi on July 21, 2010 22:14:53
Last update: July 21, 2010 22:14:53
This is a Java program to test XPATH expressions with namespace option. It's been tested with JDK1.6.
import java.io.FileInputStream;
import java.uti...
Following Getting Started with XML Security , these are the test files:
Without namespace (patient.xml).
<PatientRecord>
<Name>John Doe</Nam...
With namespace (patient_ns.xml).
<med:PatientRecord xmlns:med="http://www.medic...
Test results:
C:\>java XPathExample patient.xml /PatientRecord/V...
