字符转换为ASCII

Question

import java.util.Scanner;

public class ASCIIvalue
{
    public static void main(String[] arg)
    {
        Scanner input=new Scanner(System.in);
        char ch;

        int ascii=(int)ch;

        System.out.println("Enter you any character: ");

        ch=input.next().charAt(0);
        System.out.println("The ASCII for this character"+ ch +"is" +ascii);

        System.out.println("");

    }
}

在上面的代码中，我试图从用户获取输入(Char)，然后将其转换为它的ASCII值，但是我得到了错误Variable character might not have been initialized

Answer 1

该错误表示您正在尝试访问未初始化的变量。

int ascii = (int) ch;

正如您在这里看到的，您正在尝试访问ch，但它没有值。

要修复此问题，请将int ascii = (int) ch;移动到输入下方。

import java.util.Scanner;

public class ASCIIvalue
{
    public static void main(String[] arg)
    {
        Scanner input=new Scanner(System.in);
        char ch;

        System.out.println("Enter you any character: ");
        ch=input.next().charAt(0);

        int ascii = (int) ch;

        System.out.println("The ASCII for this character " + ch + " is " + ascii);

        System.out.println("");

    }
}

输出

Enter you any character:
a

The ASCII for this character a is 97