苏小妍中国移动面试反转字符串

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苏小妍一面让我撕代码题反转字符串，我没做出来，哭了 # 反转字符串

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344. 反转字符串

把字符串 hello 转化为 olleh

package Threadlocal;

  public class test
  {
    
    
    public static void main(String[] args) {
    
    
     String s="hello";
      char[] chars=s.toCharArray();

     int l=0;
     int r=s.length()-1;
     while(l<r){
    
    
     char temp = chars[l];
      chars[l++] = chars[r];
      chars[r--] = temp;
     }
    System.out.println(String.valueOf(chars));
   }

}

方法2
StringBuilder sb=new StringBuilder(s);
  String a= sb.reverse().toString();
   System.out.println(a);