zoukankan      html  css  js  c++  java
  • 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();  
        }  
    
    }
  • 相关阅读:
    day17---无参装饰器
    day17---作业
    python面向过程的编程思想
    算法之二分法
    python递归函数
    pyth作业3/25
    三元表达式、生成式、生成器表达式
    python 3/24作业
    python生成器
    python 迭代器
  • 原文地址:https://www.cnblogs.com/Liang-Haishan216/p/6104475.html
Copyright © 2011-2022 走看看