在Ubuntu的Opera啟用Java

１.先檢查Ubuntu中是否有安裝Java

dpkg --get-selections | egrep java

2.在Opera中啟用Java

ref:http://www.opera.com/support/kb/view/459/

• Go to Tools > Preferences > Advanced > Content.
• Click the "Java options" button. If this button is dimmed, first check the "Enable Java" option.
• Click the "Choose" button for the "Java path" field.
• Navigate to the Java directory and click "OK". The path you are looking for is the directory of your Java installation containing the files libjava.so and libawt.so. On the command line, type: find / -name libjava.so 2> /dev/null 
  For example, on a Debian system, the path is: /usr/lib/jvm/java-1.5.0-sun/jre/lib/i386
• Click the "Validate Java path" button. If you get an error message, try again with a different path.
• Click "OK" to save your changes and exit the Java dialog.
• Click "OK" to save your changes and exit the Preferences dialog.