java数据结构凯撒算法的实现

package string;
public class S_KaiSa {
	//凯撒密码的实现
	public char[] kaiSa(char[] s,int k){
		char[] t=new char[s.length];
		for(int i=0;i<s.length;i++){
			t[i]=(char) ('a'+(s[i]-'a'+k)%26);
		}
		return t;
	}
	public void disPlay(char[] t){
		for(char c:t){
			System.out.print(c);
		}
		System.out.println();
	}
	public static void main(String[] args) {
		S_KaiSa s=new S_KaiSa();
		char[] a={'a','b','c','d','e'};
		char[] t=s.kaiSa(a, 2);
		s.disPlay(t);
	}
}