判断一个字符串是否是对称字符串，例如”abc”不是对称字符串，”aba”、”abba”、”aaa”、”mnanm”是对称字符串

public class Test {

    public static void main(String[] args) {
        System.out.println(isSymmetry("abac"));
    }
    
	
    public static boolean isSymmetry(String str) {
        return str.equals(new StringBuilder(str).reverse().toString()) ? true : false;
    }

}