如何在开关盒中使用char作为大小写？ [英] How do I used a char as the case in a switch-case?

问题描述

如何在开关盒中使用字符？

How do I use a character in a switch-case? I will be getting the first letter of whatever the user inputs.

import javax.swing.*;

public class SwitCase {
    public static void main (String[] args){
        String hello="";
        hello=JOptionPane.showInputDialog("Input a letter: ");
        char hi=hello;
        switch(hi){
            case 'a': System.out.println("a");
        }
    }   
}

推荐答案

public class SwitCase {
    public static void main (String[] args){
        String hello = JOptionPane.showInputDialog("Input a letter: ");
        char hi = hello.charAt(0); //get the first char.
        switch(hi){
            case 'a': System.out.println("a");
        }
    }   
}

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