Help in understanding some code

Question

I am new to java and need some help in understanding what the setHeapWithSize method does listed below. Thanks
public class HeapSort {
public void heapsort(int[] a){
          int [] A = setHeapWithSize(a, a.length);
          buildHeap(A);
          for (int i = a.length; i>1; i--){
               a[i-1] = A[0];
               A[0] = a[i-1];
               A=setHeapWithSize (A, A.length-1);
               heapify(a, 1);
               a[0] = A[0];
     public void buildHeap (int[] a) {
          for (int i = a.length/2; i>0; i--){
          heapify(a, i);
     public void heapify (int[] a, int i){
          int l = left(i);
          int r = right(i);
          int largest;
          if (l<= heapSize(a) && a[i-1]>a[i-1]){
          largest = l;
          else{
          largest=i;
          if (r<=heapSize(a) && a[r-1]> a[largest-1]){
          largest = r;
          if (largest != i){
          int tmp = a[i-1];
          a[i-1] = a[largest-1];
          a[largest-1] = tmp;
          heapify(a, largest);
     public int heapSize (int [] a){
     return a.length;
     public int parent (int i){
     return(i/2);
     public int left (int i){
     return (2*i);
     public int right (int i){
     return (2*i +1);
     }>

Answer 1

I am new to java and need some help in understanding
what the setHeapWithSize method does listed below.Don't you think it would be a smart move to show us the code for setHeapWithSize? Or do you want us to make a wild guess at what it does based on its name?