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字符串位移

闲来无事,想起上学时数据结构课程中有个字符串位移的小算法挺有意思,今天写了下,就测试了一个字符串,纯属娱乐。

public class Offset {	public static  void swap(char [] chars , int position1 , int position2){		if(position1 < chars.length && position2 < chars.length){			char t = chars[position1];			chars[position1] = chars[position2];			chars[position2] = t;		}	}	public static void reverse(char [] chars , int begin , int end){		int i = begin;		if (end < chars.length)			while (i < end) {				swap(chars , i++ , end--);			}	}	public static void offset(char [] chars  , int n){		n = n % chars.length;		reverse(chars , 0 , n - 1);		reverse(chars, n, chars.length - 1);		reverse(chars, 0, chars.length - 1);	}		public static void main(String[] args) {		char [] a = "abcdefg".toCharArray();		offset(a , 3);		for(char ch : a)			System.out.print(ch);	}}

  

字符串位移