去除字符找到最大回文

package huiwen;

import java.util.Stack;
/**
 * 找到回文，由于无状态转移
 * @author Administrator
 *
 */
public class RmHuiwen {
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		String str = "edaabcbaded";
		hui("",str.toCharArray(),0);
		System.out.println(longest);
	}
	static String longest = "";
	public static void hui(String s,char []data, int index){
		if(index>=data.length){
			return;
		}
		//判断回文
		if(judge(s) && longest.length()<s.length()){
			longest = s;
		}
		hui(s, data, index+1);
		hui(s+data[index], data, index+1);
	}
	public static boolean judge(String s){
		char[] data = s.toCharArray();
		for(int i=0; i<data.length/2; i++){
			if(data[i]!=data[data.length-1-i]){
				return false;
			}
		}
		return true;
	}
	
}