Java Cryptography Extension (JCE) Unlimited Strength

To use AES-256 in Java, you need to install extra policy file. As

If you exported your PKCS#12 file from your browser and used a password that is greater than 7 characters, you may need to download and install the Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files so that Java applications such as the GSI-SSHTerm can read this file. This is a matter of U.S. policy and U.S. export controls (not due to technical reasons).

It seems there are no such restriction in OpenJDK.

http://www.ngs.ac.uk/tools/jcepolicyfiles
http://blogs.adobe.com/ADEP/2011/10/configuring-the-jdk-for-rights-management-encryption-using-aes-256-bit-keys.html

Force IPv4 usage in Java program (eg. zookeeper)

Bug #888643 in zookeeper (Ubuntu): “Zookeeper listen only to IPv6 interface"

  JAVA_OPTS="-Djava.net.preferIPv4Stack=true"

Anti-alias / smooth font for Java swing program

add "-J-Dswing.aatext=true -J-Dawt.useSystemAAFontSettings=on" into your java commands


p.s. It works for various Java program, eg. Netbeans

Ref:
http://ubuntuforums.org/showthread.php?t=909327
http://forums.netbeans.org/post-63860.html
http://docs.oracle.com/javase/6/docs/technotes/guides/2d/flags.html#aaFonts

Offline map generator for RMap -- TrekBuddy Atlas Creator

Dr. TYT 的 Android 地圖: Android 離線地圖系列(三)：離線地圖製作器 TrekBuddy Atlas Creator 1.2 beta 1 (android-map.blogspot.com Version 1)
http://android-map.blogspot.com/2009/07/gps-trekbuddy-atlas-creator.html

 PC 端離線地圖製作軟體 Mobile Atlas Creator 1.8 正式版
http://android-map.blogspot.com/2010/11/mobile-atlas-creator-18.html

All In One 整合版 Mobile_Atlas_Creator_1.8_SQLite.zip

Mobile Atlas Creator
http://mobac.dnsalias.org/