import javax.xml.stream.events.Characters;

/**

* @auther: WJoe

* @Description: 浦发笔试题

* 给出一个字符串,由不同的单词用空格隔开的,然后呢,把这些单词的首字母取出并

* @Date : 10:29 2018/8/1

*/

public class StringTest {

public static String stringout(String s) {

if (s == null || s.length() == 0) {

return "";

}

StringBuilder stringBuilder = new StringBuilder();

for (int i = 0; i < s.length(); i++) {

if (!Character.isLetter(s.charAt(i)) && s.charAt(i) != ' ')

return "包含其他字符";

if (i == 0 && s.charAt(i) == ' ') {

stringBuilder.append(s.charAt(i));

} else if (i == 0 && Character.isLowerCase(s.charAt(i))) {

stringBuilder.append(Character.toUpperCase(s.charAt(i)));

}

if (i > 0 && s.charAt(i - 1) == ' ' && s.charAt(i) >= 'a' && s.charAt(i) <= 'z') {

stringBuilder.append(Character.toUpperCase(s.charAt(i)));

} else {

stringBuilder.append(s.charAt(i));

}

}

return stringBuilder.toString();

}

public static void main(String[] args) {

String s = " hefjasf dslkfj dkfjsl dfj ijfds s s fs";

System.out.println(stringout(s));

}

}