java运行长度10000的数组堆栈溢出，c++和Delphi都没有

public class TestSort
{
void Sort(int Low,int High,int a[])
{
if (Low >= High) return;
int i, j;
j = a[Low];
for (i = Low + 1;i <= High; i++)
{
if (a[i] < j)
{
int k;
k = j;
j = a[i];
a[i] = k;
}
}
a[Low] = j;
Sort(Low + 1, High, a);
}
void QuickSort(int Low,int High,int a[])
{
if (Low >= High)
{
return;
}
int low, high;
low = Low;
high = High;
while(low < high)
{
while(low < high)
{
if(a[low] <= a[high])
{
high--;
}
else
{
int i;
i = a[low];
a[low] = a[high];
a[high] = i;
break;
}
}
low++;
while(low < high)
{
if (a[low] <= a[high])
{
low++;
}
else
{
int i;
i = a[low];
a[low] = a[high];
a[high] = i;
break;
}
}
high--;
}
QuickSort(Low, high, a);
QuickSort(low, High, a);
}
public static void main(String[]args)
{

int[] testArr = new int[1000];
for (int i = 0; i < testArr.length; i++) {
testArr[i] = Integer.parseInt(Util.genRandomNum(1));
}
for (int i = 0; i < testArr.length; i++) {
System.out.println("i="+i+":"+testArr[i]);
}
TestSort testsort = new TestSort();
testsort.Sort(0, testArr.length - 1, testArr);

System.out.print("Sort:/n");
int i;
for (i = 0; i < testArr.length; i++)
{
System.out.print(testArr[i]);
}
System.out.print("/n");

}

import java.util.Random;

public class Util {
public static void main(String[] args) {
System.out.println(Util.genRandomNum(1));
}
/**
* 生成随即密码
*
* @param pwd_len
*            生成的密码的总长度
* @return 密码的字符串
*/
public static String genRandomNum(int pwd_len) {
// 35是因为数组是从0开始的，26个字母+10个数字
final int maxNum = 10;
int i; // 生成的随机数
int count = 0; // 生成的密码的长度
/*char[] str = { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k',
'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };*/

char[] str = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };

StringBuffer pwd = new StringBuffer("");
Random r = new Random();
while (count < pwd_len) {
// 生成随机数，取绝对值，防止生成负数，

i = Math.abs(r.nextInt(maxNum)); // 生成的数最大为36-1

if (i >= 0 && i < str.length) {
pwd.append(str[i]);
count++;
}
}

return pwd.toString();
}