How to read Json Format

view story

http://stackoverflow.com – am a android application programmer and working on JSON right now, i have a format of json, shown in below. i am getting such format form server to my android program but the problem is am unable to show the result in listview. could provide me the logic to read that json format. { "1": { "sub1":{"marks":"10", "maxmarks":"60", "grade":"D" }, "sub2":{"marks":"", "maxmarks":"60", "grade":"" } }, "2": { "sub3":{"marks":"30", "maxmarks":"60", "grade":"B" (HowTos)