[leetcode]Zigzag conversion

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public class Solution { public String convert(String s, int numRows) { if (numRows == 1) return s; String[] temp = new String[numRows]; Arrays.fill(temp, ""); int updown = 1; int current = 0; int curRow = 0; while (current < s.length()){ temp[curRow] += s.charAt(current++); if (curRow == numRows-1){ updown = -1; }else if (curRow == 0){ updown = 1; } curRow += updown; } String result = ""; for (int i = 0; i < temp.length; i++) result+=temp[i]; return result; } }