Sort Colors
Given an array with n  objects colored red, white or blue, sort them in-place   so that objects of the same color are adjacent, with the colors in the order red, white and blue.   Here, we will use the integers 0, 1, and 2 to represent the color red, white, and blue respectively.   Note:  You are not suppose to use the library's sort function for this problem.   Example:   Input:  [2,0,2,1,1,0] Output:  [0,0,1,1,2,2]     class Solution {    public void sortColors(int[] nums) {         int low = 0;         int mid = 0;         int high = nums.length - 1;         int temp = 0;         while (mid <= high) {             switch (nums[mid]) {                 ca...