charactertest.java

Java 程序设计源码 只提供了部分

public class CharacterTest {
	public static void main(String[] args) {
		char[] ch = {'a', 'A', '1', '/', ' '};

		for(int i = 0; i < ch.length; i++) {
			if(Character.isDigit(ch[i]))
				System.out.println(ch[i] + "是数字");
			if(Character.isLetter(ch[i]))
				System.out.println(ch[i] + "是字母");
			if(Character.isLowerCase(ch[i]))
				System.out.println(ch[i] + "是小写字母");
			if(Character.isUpperCase(ch[i]))
				System.out.println(ch[i] + "是大写字母");
		}
	}
}