反转字符串

最新推荐文章于 2025-03-28 09:27:16 发布

转载最新推荐文章于 2025-03-28 09:27:16 发布 · 120 阅读

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public class PaiXu {
public static void main(String[] args) {
  String str = "abcd";
  String strr = "";
  strr = new StringBuffer(str).reverse().toString();
  System.out.println(strr);
}
}

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public class Reverse{
    public static void main(String[]args){
    String s="abcd";
    String rs="";
    for(int i=s.length()-1;i>=0;i--)
    {
        rs+=s.charAt(i);
    }
    System.out.println(rs);
    }
}

***************************************************

public class Test5 {

    public static void main(String[] args) {
        String str = "123456789";
        System.out.println(reverse(str));
    }

    public static String reverse(String str) {
        if(str == null || str.length() < 2) {
            return str;
        }
        char[] chs = str.toCharArray();
        for(int i = 0, k = chs.length / 2; i < k; i++) {
            char c = chs[i];
            chs[i] = chs[chs.length - i - 1];
            chs[chs.length - i - 1] = c;
        }
        return new String(chs);
    }
}

***************************************************

***************************************************
public class PaiXu {
public static void main(String[] args) {
  String str = "abcd";
  String rstr = "";
  char[] nc = str.toCharArray();
  for (int a = 1; a <= nc.length ; a++) {
   rstr += nc[nc.length - a];
  }
  System.out.println(rstr);
}
}