Java Stuff 1 Web Performance Reports * http://www.webperformanceinc.com/ 1 java.util.Date Gotchas * http://www.mindprod.com/jgloss/gotchas.html#DATE ...and more by Rodey Green on Dates: * http://www.mindprod.com/jgloss/calendar.html 1 Jar Dependencies Analyzer * http://www.it-eye.nl/weblog/2005/07/01/finding-jar-library-dependencies-using-jarjar/ 1 A Great Free Java Profiler * http://www.khelekore.org/jmp/index.html Running it: Make sure libjmp.dll is on your library path or java process home directory (note: Windows doesn't support LD_LIBRARY_PATH - it simply uses PATH). Then start up your VM like: java -Xrunjmp my.fine.java.Program 1 LaunchAnywhere Error "Can't launch executable" This can happen if LaunchAnywhere selects an incompatible JRE or JDK on your hard-drive to run its installer. This was the case on my machine with IBM RAD (Rational Application Developer installed). To solve the problem, insert the path to a "neutral" Java home "bin" directory in front of your PATH environment variable. I.e. simply install a JRE or JDK from the Java home page and insert the path to the 'bin' directory of that installation at the beginning of your user PATH environment variable. By the way, you can launch a diagnostic console window for LaunchAnywhere by pressing the left control key during LaunchAnywhere start-up. 1 Sharing Java objects between applet class loader instances This is not easily possible. Refer to the following links for more information: * http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4225434 and * http://java.sun.com/products/plugin/1.3.1_01a/new.html However, the page [Sharing Java objects between class loader instances] presents a solution. 1 Self-Signed Java Applets {anchor:Self-Signing Java Code} Generate a new keystore "testkey.keystore" as follows: {code:none} keytool -genkey -keyalg RSA -sigalg MD5withRSA -keystore testkey.keystore -alias testkey -validity 1460 {code} Using this command, the keytool will generate a new keypair and create a self signed certificate for its public key. To create the certificate, the keytool will prompt for the necessary bits of X.509 information. To sign the applet, use code similar to this (this code snipped was copied out of an Ant script): {code:xml} <exec executable="${env.JAVA_HOME}/bin/jarsigner.exe"> <arg value="-keystore"/> <arg value="testkey.keystore"/> <arg value="-storepass"/> <arg value="changeit"/> <arg value="-signedjar"/> <arg value="output.jar"/> <arg value="input.jar"/> <arg value="testkey"/> </exec> {code} In order to run an applet signed with this key, the generated certificate may have to be imported into the Java plugin. For this, the certificate must be exported and stored in a file (e.g. 'testkey.cer'). The command line used to do this is: {code:none} keytool -export -alias testkey -file testkey.cer -keystore testkey.keystore {code} The default keystore password is 'changeit' 2008-08-19 09:22:54.762 2005-06-01 23:48:38.927