implement min heap 1classMinHeap{2privateArrayList<Integer>arr;3privateintDEFAULT_LEN = 10;4publicMinHeap(){5arr =newArrayList<Integer>(DEFAULT_LEN);6}78//Use an existing array to build min heap9publicMinHeap(ArrayList<Integer>input){10this.arr =input;11buildMinHeap();12}1314publicMinHeap(...