Character 详解

package api;

public class CharacterApi {

	public static void main(String[] args) {
		Character character = new Character('a');
		Character character1 = new Character('d');
		character1 = Character.valueOf('b');
		
		System.out.println(character.equals('a'));
		
		int n = character.compareTo(character1);  // 'a' - 'd';
		// 等效于 Character.compare(character, character1); -3
		//System.out.println(n);  // -3
		
		boolean b = Character.isWhitespace(' '); // 是否为空字符
		//System.out.println(b); // true
		
		char c3 = Character.toUpperCase(character); // 大写  不是英文字符返回本身
		//System.out.println(c3);  // 'A'  
		c3 = Character.toLowerCase('A');  // 'a'
		n = Character.toUpperCase(97); // 大写 'a'
		//System.out.println(n); // 65-- 'A'
		n = Character.toLowerCase(65); // 'a' 不是英文字符返回本身
		//System.out.println(n);         // 97 
		
		b = Character.isLetterOrDigit(' ');  // 判断是否是数字或字母
		System.out.println(b);
		b = Character.isLetterOrDigit('1');  // 
		System.out.println(b);
		
		b = Character.isLetter('a'); // 判断是否是字母
		System.out.println(b);
		
		b = Character.isDigit('2'); // 判断是否为数字
		System.out.println(b);
		
		b = Character.isUpperCase('A'); // 判断是否为大写
		b = Character.isLowerCase('a'); // 判断是否为小写
	}

}