好吧，如果你想单号是第一位的，取代任何%2!=0与%2==0任何%2==0带%2!=0：
public static int[] seperator(int[] arr1, int left, int right){
int temp;
if(left>=right)
return arr1;
else if(arr1[left]%2==0 && arr1[right]%2!=0){
temp=arr1[left];
arr1[left]=arr1[right];
arr1[right]=temp;
return seperator(arr1, left+1, right-1);
}
else{
if(arr1[right]%2==0){//if right side is on even #, then decrease index
return seperator(arr1, left, right-1);
}
if(arr1[left]%2!=0){//if left side is on odd #, then increase index
return seperator(arr1, left+1, right);
}
}
return arr1;
}
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