download sdk and run emulator

What I have done tody:
-- download the sdk from http://developer.android.com/sdk/1.1_r1/index.html
-- run emulator as http://developer.android.com/guide/developing/tools/emulator.html
-- visit http://java.sun.com/javase/technologies/desktop/javawebstart/demos.html
It seems android's current browser did not support webstart.

so things need todo:
-- get to know how to write simple program and debug it on android.
-- get to know how to crack browser on android (how to write plugin, it maybe something from webkit)
-- get to know how to run/compile java/swing program on android