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java – 如何在switch-case中使用char作为案例？

如何在开关盒中使用角色？我将收到用户输入的第一个字母.

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");
        }
    }   
}

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");
        }
    }   
}

翻译自：https://stackoverflow.com/questions/6906001/how-do-i-used-a-char-as-the-case-in-a-switch-case

原文 https://codeday.me/bug/20190111/514138.html

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