字符串倒序输出的三种方法-java版

目录

法一(拆分字符数组):

public class MyTest { 
    public static void main(String[] args) { 

        String s = "abbdfaadqwedqfdad";
        //字符串转化为字符数组
        char[] charArray = s.toCharArray();

        char[] chars = new char[s.length()];

        for (int i = 0; i < charArray.length; i++) { 
            chars[i] = charArray[charArray.length - i - 1];
        }
        //直接利用字符串的构造方法将字符数组转化为字符串
        String s1 = new String(chars);

        System.out.println(s1);
    }
}

法二(利用字符串串联符号”+”特性):

  • 字符串+特性还可参考下面
    字符串加号拼接时,系统底层是创建StringBuilder对象然后调用append()拼接再通过toString()转换为String类型最后存于堆内存
public class MyTest { 
   public static void main(String[] args) { 

        String s = "abbdfaadqwedqfdad";
        String s2 = "";

        for (int i = s.length() - 1; i >= 0; i--) { 
            s2 += s.charAt(i);
        }
        System.out.println(s2);
    }
    }
}

法三(StringBuilder的reverse()方法):

    public static void main(String[] args) { 

        String s = "abbdfaadqwedqfdad";
        StringBuilder stringBuilder = new StringBuilder(s);

        stringBuilder.reverse();

        String s1 = stringBuilder.toString();

        System.out.println(s1);
    }
    原文作者:U12Euphoria
    原文地址: https://blog.csdn.net/U12Euphoria/article/details/123082670
    本文转自网络文章,转载此文章仅为分享知识,如有侵权,请联系博主进行删除。
点赞