Stackoverflow with Quicksort Java implementation

Question

Having some problems implementing quicksort in java. I get a stackoverflow error when I run this program and I\'m not exactly sure why. If anyone can point out the error, it

Answer 1

//Just implemented the tester class for this and it'll work

public int[] sort(int[] A, int from, int to ){

if(from1)
        sort(A,from, pivot-1);

    if(pivot+1

}

public int partition(int A[ ], int from, int to){

while(from < to){
    int pivot=A[from];

    while(A[from]pivot)
        to--;


    if(from