Input: Annuity Lump sum from Annuity Target fund_20170918!
Output1: ytiunnA pmuL mus morf ytiunnA tegraT !81907102_dnuf慎皱，只翻轉(zhuǎn)單詞中的字符順序
Output2:!81907102_dnuf tegraT ytiunnA morf mus pmuL ytiunnA， 直接全部翻轉(zhuǎn)
/**
*
* @author Administrator
* date 06.May.2018
*/
public class RevDemo {
public static void swapStr(char[] arr, int begin, int end){
while (begin < end){
char tmp = arr[begin];
arr[begin] = arr[end];
arr[end] = tmp;
begin++;
end --;
}
}
public static void revStr(String s){
//initialize ret
String ret = " ";
//如果結(jié)尾沒有空格结闸，需要補(bǔ)上,否則最后一個(gè)單詞不會(huì)反轉(zhuǎn)
if(!s.endsWith(" ")){
s += " ";
}
char[] charArr = s.toCharArray();
int begin = 0;
for(int i = 0;i <= s.length()-1; i++){
if (charArr[i] == ' '){
swapStr(charArr,begin,i-1);
begin = i+1;
}
}
ret = new String(charArr);
System.out.println(ret);;
}
public static void revAll(String s){
for(int i = s.length()-1; i >=0; i--){
char c = s.charAt(i);
System.out.print(c);
}
//換行
System.out.println();
}
public static void main (String[] args){
String str = "Annuity Lump sum from Annuity Target fund_20170918!";
System.out.println(str);
revStr(str);
revAll(str);
}
}
//Annuity Lump sum from Annuity Target fund_20170918!
//ytiunnA pmuL mus morf ytiunnA tegraT !81907102_dnuf
//!81907102_dnuf tegraT ytiunnA morf mus pmuL ytiunnA
