java 输入一个字符输出字符的ASCII值并判断是什么类型的字符

public class Test1 {
    public static void main(String[] args) {
        Scanner input=new Scanner(System.in);
        String a=input.nextLine();
        char b=a.charAt(0);
        System.out.println("输入字符的ASCII值十进制："+(int)b);
        int c=b;
        if(97<=c && c<=122){
            System.out.println("小写字母");
        }
        else if(65<=c && c<=90){
            System.out.println("大写字母");
        }
        else if(48<=c && c<=57){
            System.out.println("数字字符");
        }
        else if(c==43 || c==45 || c==42 || c==47 || c==37){
            System.out.println("算术运算符");
        }
        else if(60<=c && c<=62){
            System.out.println("关系运算符");
        }
        else if(c==38 || c==124 || c==33 || c==94 ){
            System.out.println("逻辑运算符");
        }else
            System.out.println("其他运算符");
        input.close();
    }
}