Take this opera mini software as example
THIS IS THE WAY
First you should download this software
Microemulator
Important :- Before install Microemulator you must have java intalled PC
MICROEMULATOR
Then you need to download this software
Opera Mini Web browser
THEN START
Starting and configuring the software:
double-click "microemulator.jar" to run it. If that doesn't work you'll have to type "java -jar microemulator.jar" on console. (Please note you need to have JRE installed for this to work
go to "Options > Select device", click "Add...", navigate to "microemulator\devices" and select "microemu-device-resizable.jar"
select the "Resizable device" profile you just added and click "Set as default"
click the "Resize" button in lower right to set the size you want
go to "File > Open JAD" and choose the Opera Mini jad you previously downloaded
"Opera Mini" now appears in the list of apps you can start, click the "Start" button to launch it