大厂Java笔试题之判断字母大小写

/*** 题目：如果一个由字母组成的字符串，首字母是大写，那么就统计该字符串中大写字母的数量，并输出该字符串中所有的大写字母。否则，就输出* 该字符串不是首字母大写*/
public class Demo2 {public static void main(String[] args) {
//        outputWordAscii();Scanner scanner = new Scanner(System.in);while (scanner.hasNextLine()) {String s = scanner.nextLine();char[] chars = s.toCharArray();if (isUpperCase(chars[0])) {int upperCaseCount = getUpperCaseCount(chars);System.out.print(upperCaseCount + " ");System.out.println();} else {System.out.println("不是首字母大写");}}scanner.close();}public static boolean isUpperCase(char aChar) {if (aChar >= 65 && aChar <= 90) {return true;} else {return false;}}public static int getUpperCaseCount(char[] chars) {int res = 0;for (int i = 0; i < chars.length; i++) {if (isUpperCase(chars[i])) {System.out.print(chars[i] + " ");res++;}}return res;}public static void outputWordAscii() {for (int i = 65; i <= 122; i++) {if (i > 90 && i< 97) {continue;}System.out.print((char) i + " ");}}
}

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