字符串单词反转

输入：Many People In Room GHHSAaasABt

输出：Ynam Elpoep Ni Moor TBASAaasHHg 

package interview;

public class ReverseWord {
public static final StringBuffer sb = new StringBuffer();
public static void main(String[] args){
String str = "Many People In Room GHHSAaasABt";
String[] strArray = str.split(" ");
for (String temp : strArray) {
reverseArray(temp);
}
System.out.println(sb);

}
public static void reverseArray(String arr) {
// TODO Auto-generated method stub
char[] cha = arr.toCharArray();
for(int start=0,end=cha.length-1;start<end;end--,start++)
{
int[] flag = new int[cha.length];
int index = 0;
if(Character.isUpperCase(cha[start]) && Character.isUpperCase(cha[end]) ){ //如果交换的两个字符都是大写，则直接交换
char temp = cha[start];
cha[start] = cha[end];
cha[end] = temp;
}else{ //将大写字母的脚标记录下来，并且把大写字母转换成小写
char temp = cha[start];
if(Character.isUpperCase(temp)){
flag[index] = start;
index++;
temp = Character.toLowerCase(temp);
}
cha[start] = cha[end];
cha[end] = temp;
for (int i : flag) {
cha[i] = Character.toUpperCase(cha[i]);
}
}
}
sb.append(new String(cha)+" ");
}

}