AP COMPUTER SCIENCE A

Array vs ArrayList Memory Resizing

Witness the internal array backing an ArrayList dynamically resize. Compare fixed memory bounds against O(N) copy operations when capacity is exceeded.

3,200 views

AP COMPUTER SCIENCE A

Heapsort Visualization

Visualize treating a flat array as a Complete Binary Tree. Watch the algorithm Build Max Heap, then extract elements to sort in O(N log N) time without extra memory.

2,700 views

AP COMPUTER SCIENCE A

Sorting Algorithms O(N^2) vs O(N log N)

Visualize Selection, Insertion, and Merge sort line-by-line. Track memory accesses, array swaps, and Big-O efficiency in real time.

2,100 views