基于Java代码实现数字在数组中出现次数超过一半

public int MoreHalf(int[] nums) {
int result = 0;
int count = 1;
if (nums.length == 0)
return -1;
result = nums[0];
for (int i = 1; i < nums.length; i++) {
if (count == 0) {
result = nums[i];
count = 1;
continue;
}
if (result == nums[i])
count++;
else
count--;
}
return result;
}

public int Partition(int[] nums,int start,int end){
int pivotkey = nums[start];
int origin = start;
while(start<end){
while(start<end&&nums[end]>=pivotkey) end--;
while(start<end&&nums[start]<pivotkey) start++;
swap(nums,start,end);
} 
swap(nums,start,end);
swap(nums,origin,end);
return end;
}
public int[] swap(int[] ints, int x, int y) {
int temp = ints[x]; 
ints[x] = ints[y]; 
ints[y] = temp; 
return ints; 
} 
public int MoreThanHalf(int[] nums){
if(nums.length==0)
return -1;
int start = 0;
int end = nums.length-1;
int index = Partition(nums, start, end);
int mid = nums.length/2;
while(index!=mid){
if(index>mid)
//如果调整数组以后获得的index大于middle，则继续调整start到index-1区段的数组
index = Partition(nums, start, index-1);
else{
//否则调整index+1到end区段的数组 
index = Partition(nums, index+1, end);
}
}
return nums[index];
}