Java小实验之数据转换

看到有人问如图的程序，就去写了几行代码，顺便复习一下条件语句和ASCII码

import java.util.Scanner;
public class test1 {

    public static void main(String[] args) 
    {
        Scanner sc = new Scanner(System.in);
        System.out.print("输入一个ASCII数值：");
        int ascii = sc.nextInt();
        sc.close();
        char ch = (char)ascii;
        //在‘a’~‘z’转成‘A’~‘Z’
        if(ch >= 'a' && ch <= 'z')
        {
            System.out.println((char)(ch-32));
        }
        //在‘A’~‘Z’转成‘a’~‘z’
        else if(ch >= 'A' && ch <= 'Z')
        {
            System.out.println((char)(ch+32));
        }
        //在‘0’~‘9’输出0~9
        else if(ch >= '0' && ch <= '9')
        {
            System.out.println(ch);
        }
        //输出“+ - * /”
        else if(ch == '+' || ch== '-' || ch == '*' || ch == '/')
        {
            System.out.println("属于算术运算符");
        }
        //输出“非法字符”
        else
        {
            System.out.println("非法字符");
        }
    }
}

作者：耑新新，发布于  博客园

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