LeetCode Java First 400 题解-027

Remove Element    Easy

Given an array and a value, remove all instances of that value in place and return the new length.

Do not allocate extra space for another array, you must do this in place with constant memory.

The order of elements can be changed. It doesn't matter what you leave beyond the new length.

Example:
Given input array nums = [3,2,2,3], val = 3

Your function should return length = 2, with the first two elements of nums being 2.

public int removeElement(int[] nums, int val) {
    int j = 0;
    for (int i = 0; i < nums.length; ++i) {
        if (val != nums[i]) {
            nums[j++] = nums[i];
        }
    }
    return j;
}

思路：与上一题相同，顺序找与给定字符不同的，将其放到当前指针处，并计数。