Differences

This shows you the differences between two versions of the page.

--- java:index [2014/01/07 07:51] – rlunaro
+++ java:index [2024/10/05 17:13] (current) – rlunaro
@@ Line 1: / Line 1: @@
 ====== Apuntes de Java ======
-Varias notas sobre java. Al que quiera entender, que entienda.
+Varias notas sobre java.
-  * [[http://docs.oracle.com/javase/specs/#251530|ESTANDAR JAVA]]
-  * [[http://wiki.metawerx.net/wiki/Web.xml]] - toda la documentación sobre "web.xml"
+<WRAP column 30%>
-  * [[howToMakeALinkLookLikeAButton|How to make a link look like a button]]
+**Application servers**
-  * [[webdav|Java webdav]]
-  * [[javadoc|Javadoc made easy]]
+  * [[Jboss|Jboss]]
-  * [[jsp|JSP]]
+  * [[Tomcat|Tomcat]]
+**Frameworks and Tools**
+  * [[eclipse|Eclipse]]
   * [[maven|Maven]]
+  * [[jsf|JSF]]
+  * [[jsp|JSP]]
+  * [[JUnit4|Junit4]]
   * [[spring|Spring]]
   * [[hibernate|Hibernate]]
+  * [[log4j|Example of configuration of log4j]]
+  * [[log4j:notProcessSafe|Log4j is not process safe]]
+**Standards**
+  * [[http://docs.oracle.com/javase/specs/#251530|ESTANDAR JAVA]]
+  * [[http://wiki.metawerx.net/wiki/Web.xml]] - toda la documentación sobre "web.xml"
+  * [[webxml|Web.xml]]
+  * [[javadoc|Javadoc made easy]]
   * [[javaBeans|Java Beans]]
-  * [[jsf|JSF]]
-  * [[JUnit4|Junit4]]
-  * [[eclipse|Eclipse]]
-  * [[Jboss|Jboss]]
-  * [[Tomcat|Tomcat]]
-  * [[Ayuda|Ayuda]]
-  * [[JDBC|JDBC]]
-  * [[ficheros|Ficheros]]
   * [[MimeTypes|MimeTypes]]
-  * [[NumerosAleatorios|Números Aleatorios]]
+</WRAP>
+**Recipes**
+  * [[howToMakeALinkLookLikeAButton|How to make a link look like a button]]
+  * [[http://java67.blogspot.com.es/2015/07/how-to-stop-thread-in-java-example.html|How to stop a thread]]
   * [[DevelopmentMode|Configurar modo desarrollo]]
-  * [[webxml|Web.xml]]
+  * [[NumerosAleatorios|Números Aleatorios]]
-  * [[Infocenter|Setting up an Infocenter -or help system- for a project]]
+  * [[concurrentQueue|A concurrent version of a queue]]
-  * [[log4j|Example of configuration of log4j]]
+  * [[writingErrorsInLog|Writing properly errors in log file]]
-  * [[log4j:notProcessSafe|Log4j is not process safe]]
   * [[durationToText|Convert a time duration into a text]]
-  * [[java7onLinux|Install java 7 on linux by hand]]
   * [[javaService|Create your own java windows services using the Jboss service wrapper]]
-  * [[writingErrorsInLog|Writing properly errors in log file]]
+  * [[javaServiceLinux|A simple script for creating a service in linux]]
-  * [[concurrentQueue|A concurrent version of a queue]]
   * [[searchInsideAJarFile|How to search inside a Jar file]]
   * [[allAvailableTimeZones|List all available timezones that are in your JVM]]
-  * [[NotasSobrePluginsEclipse|Mis notas sobre plugins eclipse]]
   * [[CreateMd5HashInJavaWithSpring|Create a md5 hash in java with eclipse]]
+**Projects**
   * [[TestPi4J|TestPI4J: A testing framework for your PI4J Projects]]
-  * [[MiningTheSocialWeb|Mining the Social Web]]
+  * [[2by2RubikCube|The Rubik's cube 2 by 2]]
+**Miscellaneous**
+  * [[Ayuda|Ayuda]]
+  * [[JDBC|JDBC]]
+  * [[ficheros|Ficheros]]
+  * [[Infocenter|Setting up an Infocenter -or help system- for a project]]
+  * [[java7onLinux|Install java 7 on linux by hand]]
+  * [[http://www2.sys-con.com/ITSG/virtualcd/Java/archives/0612/mair/index.html|Xproperties]]
+  * [[Minecraft|Minecraft]]
+  * [[Sonar|Sonar]]
@@ Line 79: / Line 105: @@
 </code>
-==== ¿Qué tarda más??? ====
-Con frecuencia veo construcciones como ésta:
-<code java>
-if(logger.isInfoEnabled()){
-	logger.info("Prueba de log");
-}
-</code>
-En el código Java de otros. "Es para que vaya más rápido" me dicen. Muy bien. Vamos a comprobarlo: he hecho un programa de prueba (ver abajo) a ver qué construcción tarda más: si con el isInfo or isDebug o lo que sea, o sin él.
-Me he llevado la sorpresa de que es más rápido sin el ''if''... justo lo que yo pensaba.
-Otra mas: para el ejemplo del programa (1.000.000 de ejecuciones) la diferencia es de un segundo. Es decir, la comprobación tarda un microsegundo en hacerse.
-**No merecería la pena, aunque el resultado fuera al revés:** la legibilidad del código es mejor cuanto más simple.
-<code java>
-import java.io.File;
-import java.util.Date;
-import org.apache.log4j.Logger;
-import org.apache.log4j.PropertyConfigurator;
-public class App {
-	public static final int ERROR_CODE = -1;
-	public static final int OPERATION_OK = 0;
-	/**
-	 * @param args
-	 */
-	public static void main(String[] args) {
-		String log4jFile = "c:/workspace/LogTester/src/log4j.properties";
-		// deletes the log file prior to do the test
-		File deleter = new File("c:/temp/logtester.log");
-		deleter.delete();
-		// start the logger tester
-		Logger logger = Logger.getLogger("tester");
-		PropertyConfigurator.configure(log4jFile);
-		Date start1 = new Date();
-		for( long count1 = 0; count1 < 1000000; count1++ )
-		{
-			if(logger.isInfoEnabled()){
-				logger.info("Prueba de log");
-			}
-		}
-		Date end1 = new Date();
-		Date start2 = new Date();
-		for( long count2 = 0; count2 < 1000000; count2++ )
-		{
-			logger.info("Prueba de log");
-		}
-		Date end2 = new Date();
-		System.out.println( "con comprobacion tardó: " + (end1.getTime() - start1.getTime())/1000 + " segundos " );
-		System.out.println( "SIN comprobacion tardó: " + (end2.getTime() - start2.getTime())/1000 + " segundos " );
-	}
-}
-</code>
@@ Line 244: / Line 197: @@
 ~~DISQUS~~