判断一个字符串是否对称

package cn.itcast;

import java.util.Scanner;

public class test {
	public static boolean isarray(String s1){
		char[] ch=s1.toCharArray();
		for(int start=0,end=ch.length-1;start<=end;start++,end--){
			if(ch[start]!=ch[end]){
			return false;
			}
		}
		return true;
	}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc=new Scanner(System.in);
		System.out.println("please input number:");
		String s1=sc.nextLine();
		System.out.println(test.isarray(s1));
		
}
}