Duke CPS 100E  What can you put into an Array List (4 pages)
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What can you put into an Array List
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 Cps 100e  Programming Design and Analysis II
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What can you put into an ArrayList Anything that derives from Object String ArrayList Counter int double char boolean NO What can we do if want a collection of int values Put an upper bound on the count and use array int index 0 int a new int HUGE NUMBER while if condition a index value CompSci 100E 5 1 What can you put into an ArrayList Use a wrapper class see java lang int double char boolean Integer Double Character Boolean ArrayList list new ArrayList while if condition list add new Integer value int a new int list size for int k 0 k list size k a k Integer list get k intValue CompSci 100E 5 2 What is a char Differences between unicode and ASCII Why is unicode used Why should we care What should we know How many of the details are important A char value can be treated like a 16 bit int value Add integer to it cast back to char Subtract character from it get int back counters z s charAt k Anatomy of the statement above CompSci 100E 5 3 Lydia Kavraki Awards Grace Murray Hopper Brilliant 10 I like to work on problems that will generally improve the quality of our life What s the thing you love most about science Working with students and interacting with people from diverse intellectual backgrounds Discovery and the challenge of solving a tough problem especially when it can really affect the quality of our lives I find the whole process energizing CompSci 100E 5 4
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