迴文字母卡片序列的基元素長度

package CommandPattern1.edu.com;
import java.util.Scanner;
public class Test4 
{
    public static boolean isHuiWen(String text) 
    {
        int length = text.length();
        for (int i = 0; i < length / 2; i++) 
        {
            if (text.toCharArray()[i] != text.toCharArray()[length - i - 1]) 
            {
                return false;
            }
        }
        return true;
    }
    
    public static void main(String[] args) {

        //String text = "abccba";
        //String text = "ABBAABBA";
    	//String text = "ABC";
    	Scanner scanner = new Scanner(System.in);  
    	String text = scanner.nextLine();  
        if(text.length()==0) {
        	System.out.println(0);
        }
        else 
        {
	        while(isHuiWen(text))
	         {
	         	String getSignInfo = text.substring(0, text.length()/2);
	         	text=getSignInfo;
	        }
	        System.out.println(text.length());
	    }
    }
}