//演示charater類方法的使用.
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]+" 是數字。");
			if(Character.isLetter(ch[i]))
				System.out.println(ch[i]+" 是字母。");
			if(Character.isLowerCase(ch[i]))
				System.out.println(ch[i]+" 是小寫字母。");
			if(Character.isUpperCase(ch[i]))
				System.out.println(ch[i]+" 是大寫字母。");
		}
	}
}