How do I use a char as the case in a switch-case

Question

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 SwitchCase       public static void main  String   args            String hello    quot  quot           hello   JOptionPane showInputDialog  quot Input a letter   quot            char hi   hello          switch hi                case  a   System out println  quot a quot

User · Answer

charAt gets a character from a string  and you can switch on them since char is an integer type   So to switch on the first char in the String hello   switch  hello charAt 0       case  a       break      You should be aware though that Java chars do not correspond one-to-one with code-points   See codePointAt for a way to reliably get a single Unicode codepoints

User · Answer

Like that  Except char hi hello  should be char hi hello charAt 0    Don t forget your break  statements

User · Answer

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

User · Answer

Using a char when the variable is a string won t work  Using  switch  hello charAt 0      you will extract the first character of the hello variable instead of trying to use the variable as it is  in string form  You also need to get rid of your space inside   case  a

User · Answer

Here s an example   public class Main        public static void main String   args             double val1   100          double val2   10          char operation    d           double result   0           switch  operation                 case  a                   result   val1   val2  break               case  s                   result   val1 - val2  break              case  d                   if  val2    0                      result   val1   val2  break              case  m                   result   val1   val2  break               default  System out println  Not a defined operation                         System out println result

[java] How do I use a char as the case in a switch-case?

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