JavaSE8基础 Character.isXXX 判断一个字符是 数字 小写字母 大写字母

package jizuiku.t01;

public class Demo00 {
	public static void main(String[] args) {
		String str = "abc012345ABCD!@#$";

		int countOfDigit = 0;
		int countOfLower = 0;
		int countOfUpper = 0;
		int countOfOther = 0;

		for (int i = 0, stringLength = str.length(); i < stringLength; ++i) {
			if (Character.isDigit(str.charAt(i))) {
				++countOfDigit;//数字
			} else if (Character.isLowerCase(str.charAt(i))) {
				++countOfLower;//小写
			} else if (Character.isUpperCase(str.charAt(i))) {
				++countOfUpper;//大写
			} else {
				++countOfOther;//三种之外的类型
			}
		}

		System.out.println("countOfDigit:"+countOfDigit);
		System.out.println("countOfLower:"+countOfLower);
		System.out.println("countOfUpper:"+countOfUpper);
		System.out.println("countOfOther:"+countOfOther);
	}
}