字符串倒序输出的五种方法-ag真人游戏

//1. 使用数组循环
public static string array(string s){
        int length=s.length();
        char[] array=s.tochararray();
        for(int i=0;i=0;i--){
            sb.append(s.charat(i));
        }
        return sb.tostring();       
    } //stringbuilder比stringbuffer快，但线程不安全
//4.栈的后进先出
    public static string reversebystack(string str) {  
        if(str == null || str.length() == 0) {  
            return str;  
        }  
        stack strstack = new stack();  
        char[] charray = str.tochararray();  
        for(character ch: charray) {  
            strstack.push(ch);  
        }  
        int len = str.length();  
        for(int i= 0; i< len; i  ) {  
            charray[i] = strstack.pop();  
        }  
        return new string(charray);  
    }  
5.  迭代完成
    public static string reversebyrecursive(string str) {  
      if(str == null || str.length() == 0) {  
           return str;  }  
      int len = str.length();  
      if(len == 1) {  
         return str;  
      } else {  
return reversebyrecursive(str.substring(1))  str.charat(0);  
        }  
    }