CCI 1.2 反转字符串

反转字符串

package test;public class ReverseString {//java implementspublic static String reverseString(String str){if(str==null || str.length()==0)return str;char[] array = str.toCharArray();int i=0, j=array.length-1;while(i<j){char temp = array[i];array[i] = array[j];array[j] = temp;i++;j--;}return new String(array);}public static void main(String[] args) {// TODO Auto-generated method stubString case1 = null;String case2 = "";String case3 = "a";String case4 = "abcde";String result = reverseString(case4);System.out.println(case3);}}