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So. you look quite happy now....'
You can also try to reduce no. of lines of code.....which helps to run your program little faster....'
(I read it somewhere while Googling)'
Declare all variables...

Also in line 14, 17 and 20, replace scan with scan1, scan2, scan3 respectively.'

Java is case sensitive. . .'
Your code contains nextint() and nextdouble() . . .'
Replace them with nextInt() and nextDouble(). . .'
('I' and 'D' are capital)'