java 反取字符串

public class demo2 {/*** 2 : 将字符串反取出来     新中国好  好国中新*/public static void main(String[] args) {String s = "新中国好";s = reverse1(s);System.out.println("方法一：" + s);s = reverse2(s);System.out.println("方法二：" + s);s = reverse3(s);System.out.println("方法三：" + s);}public static String reverse1(String s) {int len = s.length();if (len <= 1) {return s;}String left = s.substring(0, len / 2);String right = s.substring(len / 2, len);return reverse1(right) + reverse1(left);}public static String reverse2(String s) {  char[] array = s.toCharArray();  String reverse = "";  for (int i = array.length - 1; i >= 0; i--) {reverse += array[i];  }   return reverse;  }  public static String reverse3(String s) {return new StringBuffer(s).reverse().toString();  }  }