65

98

-33

c1 is smaller than c2!

a A

true

Character c1 = new Character('A');
        Character c2 = new Character('b');
        // 输出字符的ASCII码值
        System.out.println(c1.charValue() + 0);
        System.out.println(c2.charValue() + 0);
        // 比较两个字符ASSII码值大小
        int i = c1.compareTo(c2);
        System.out.println(i);
        if(i==0){
            System.out.println("c1 is equal c2!");
        }
        else if(i<0){
            System.out.println("c1 is smaller than c2!");
        }
        // 大小写转换
        System.out.println(Character.toLowerCase('A')+" "
                + Character.toUpperCase('a'));
        // 判断是否为数字
        System.out.println(Character.isDigit('9'));