import java.util.Scanner;
public class EchoTest {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner sc=new Scanner(System.in);
System.out.print("请输入你要字符串:");
String str=sc.next();
boolean flag=true;
for(int x=0;x<str.length()/2;x++){
if(str.charAt(x)!=str.charAt(str.length()-x-1)){
flag=false;
break;
}
}
if(flag){
System.out.println("此是回文字符串");
}else{
System.out.println("此不是回文字符串");
}
}
}
