package character;

public class TestChar {

    public static void main(String[] args) {

        char c1 = 'a';

        char c2 = '1';//字符1,而非数字1

        char c3 = '中';//汉字字符

        char c4 = 'ab'; //只能放一个字符

    }

}

package character;

public class TestChar {

    public static void main(String[] args) {

        char c1 = 'a';

        Character c = c1; //自动装箱

        c1 = c;//自动拆箱

    }

}

package character;

public class TestChar {

    public static void main(String[] args) {

        System.out.println(Character.isLetter('a'));//判断是否为字母

        System.out.println(Character.isDigit('a')); //判断是否为数字

        System.out.println(Character.isWhitespace(' ')); //是否是空白

        System.out.println(Character.isUpperCase('a')); //是否是大写

        System.out.println(Character.isLowerCase('a')); //是否是小写

        System.out.println(Character.toUpperCase('a')); //转换为大写

        System.out.println(Character.toLowerCase('A')); //转换为小写

        String a = 'a'; //不能够直接把一个字符转换成字符串

        String a2 = Character.toString('a'); //转换为字符串

    }

}

package character;

public class TestChar {

    public static void main(String[] args) {

        System.out.println("使用空格无法达到对齐的效果");

        System.out.println("abc def");

        System.out.println("ab def");

        System.out.println("a def");

        System.out.println("使用\\t制表符可以达到对齐的效果");

        System.out.println("abc\tdef");

        System.out.println("ab\tdef");

        System.out.println("a\tdef");

        System.out.println("一个\\t制表符长度是8");

        System.out.println("12345678def");

        System.out.println("换行符 \\n");

        System.out.println("abc\ndef");

        System.out.println("单引号 \\'");

        System.out.println("abc\'def");

        System.out.println("双引号 \\\"");

        System.out.println("abc\"def");

        System.out.println("反斜杠本身 \\");

        System.out.println("abc\\def");

    }

}