start scala in ubuntu

1. install jdk5.0
2. set env
vi .bashrc
export PATH=the path/scala-2.8.0.final/bin:$PATH

3. test
You may test the distribution by running the following commands:

$  sbaz install scala-devel-docs
$  scalac your path/doc/scala-devel-docs/examples/sort.scala
$  scala examples.sort
[6,2,8,5,1]
[1,2,5,6,8]
$  scala
scala> examples.sort.main(null)
[6,2,8,5,1]
[1,2,5,6,8]
scala>:quit

it's ok now

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