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Excel Sheet Column Title

Change-Id: Ic0bc978a6ca4a3bd065d8d60f58a089630e100bd

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	`1`	`+/*`
	`2`	`+ Author: King, wangjingui@outlook.com`
	`3`	`+ Date: Dec 19, 2014`
	`4`	`+ Problem: Excel Sheet Column Title`
	`5`	`+ Difficulty: Easy`
	`6`	`+ Source: https://oj.leetcode.com/problems/excel-sheet-column-title/`
	`7`	`+ Notes:`
	`8`	`+ Given a non-zero positive integer, return its corresponding column title as appear in an Excel sheet.`
	`9`	`+`
	`10`	`+ For example:`
	`11`	`+`
	`12`	`+ 1 -> A`
	`13`	`+ 2 -> B`
	`14`	`+ 3 -> C`
	`15`	`+ ...`
	`16`	`+ 26 -> Z`
	`17`	`+ 27 -> AA`
	`18`	`+ 28 -> AB`
	`19`	`+`
	`20`	`+ Solution: 1. Iteration.`
	`21`	`+ 2&3. recursion.`
	`22`	`+ */`
	`23`	`+publicclassSolution {`
	`24`	`+publicStringconvertToTitle(intn) {`
	`25`	`+StringBuffersb =newStringBuffer();`
	`26`	`+while (n >0) {`
	`27`	`+sb.insert(0,(char)((n -1)%26 +'A'));`
	`28`	`+n = (n -1) /26;`
	`29`	`+ }`
	`30`	`+returnsb.toString();`
	`31`	`+ }`
	`32`	`+}`

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