Java switch statement

[namarino]

/** * Write a description of class Practice here. *  * @author (your name)  * @[member=versions] (a version number or a date) */import java.util.Scanner;public class Practice{    public static void main(String[]args)    {        Scanner scan = new Scanner(System.in);        char letter;        System.out.print("enter a letter you idiot");        letter = scan.next().charAt(0);        myABCs(letter);    }        public static void myABCs(char letter)    {        switch(letter)        {            case 'a':                System.out.print("apple");                break;            case 'b':                System.out.print("batt");                break;            case 'c':                System.out.print("cat");                break;        }    }               }

I'm doing some practice for a test. How do I accept upper case letters as well as lower case without adding another case to my switch statement?

[Guest]

case 'c':

case 'C':

bla bla bla;

break;

[namarino]

case 'c':

case 'C':

bla bla bla;

break;

could I do that without adding another case? can I use some kind of method that ignores the case?

[79wjd]

I'm doing some practice for a test. How do I accept upper case letters as well as lower case without adding another case to my switch statement?

Letter.toUpperCase(); //capitalizes all the letters

Edit: whoops, letter isn't a string, and toUpperCase() doesn't work on chars (i think).

[Guest]

could I do that without adding another case? can I use some kind of method that ignores the case?

Why dont use if?

[DavidTheWin]

Why dont use if?

 

When doing multiple comparisons like this a switch statement works out to be cleaner

Character.toUpperCase(char);

Will convert a character to uppercase. If you convert any character you get to uppercase, then write your cases to only look at uppercase characters then it doesn't matter what case the characters you are given are.

[kwljunky]

snip

Character.toLowerCase()

Or Character.toUpperCase() ? 

 

Here is the details of the Character class in the java doc: https://docs.oracle.com/javase/7/docs/api/java/lang/Character.html

 

so: 

 

/** * Write a description of class Practice here. *  * @author (your name)  * @[member='versions'] (a version number or a date) */import java.util.Scanner;public class Practice{    public static void main(String[]args)    {        Scanner scan = new Scanner(System.in);        char letter;        System.out.print("enter a letter you idiot");        letter = scan.next().charAt(0);        myABCs(letter);    }        public static void myABCs(char letter)    { letter = Character.toLowerCase(letter); //before the switch statement as the char is passed into the method          switch(letter)        {            case 'a':                System.out.print("apple");                break;            case 'b':                System.out.print("batt");                break;            case 'c':                System.out.print("cat");                break;        }    }               }

[namarino]

How would you do this one? I know how to print out random numbers, but not within a range. How would you do that?

 Write a short class to print out 5 randomly-generated numbers in the range 3-18 (inclusive).  The results should be different every time the program is run.

[79wjd]

How would you do this one? I know how to print out random numbers, but not within a range. How would you do that?

 Write a short class to print out 5 randomly-generated numbers in the range 3-18 (inclusive).  The results should be different every time the program is run.

System.out.print((int)((Math.random()*16)+3))