Simple java Question

Input

Year,Make,Model,Description,Price 1997,Ford,E350,"ac, abs, moon",3000.00 1999,Chevy,"Venture ""Extended Edition""","",4900.00 1996,Jeep,Grand Cherokee,"MUST SELL! air, moon roof, loaded",4799.00 ,,"Venture ""Extended Edition""","",4900.00

and the output should be

[Year,Make,Model,Description,Price] [1997,Ford,E350,ac,abs,moon,3000.00] [1999,Chevy,Venture "Extended Edition",null,4900.00] [1996,Jeep,Grand Cherokee,MUST SELL!] [air,moon roof,loaded,4799.00] [null,Venture "Extended Edition",null,4900.00]

read from input file (txt) and create output file with the result above