字符串反转

 1 public class strReverseWithArray{
 2     public static String strReverseWithArray(String string){
 3         if(string == null||string.length()==0) return string;
 4         int length = string.length();
 5         char[]array = string.toCharArray();
 6         for(int i=0;i<length;i++){
 7             //charAt() 方法用于返回指定索引处的字符。索引范围为从 0 到 length() - 1
 8             array[i] = string.charAt(length-i-1);
 9         }
10         return new String(array);
11     }
12 
13      public static void main(String []args){
14         String a = "1234" ;
15         System.out.println(strReverseWithArray(a));
16      }
17 }