string

[durdanto]

How do we eliminate a letter from a string?

For example :

string = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"

then user inputs a letter. i.e: A

How do perform the following:

Letters not tried yet: "-BCDEFGHIJKLMNOPQRSTUVWXYZ"

I tried this but won't work:

String letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

String guessLetter = kb.next();

System.out.println ("Letters not tried yet: " + letters.replace(guessLetter, " - "));

[Petr]

I think you have problem with reading data from command-line
there kb.next(); - what is kb?

[durdanto]

Scanner kb = new Scanner(System.in);
which I declared it before. sorry i did not mention it.

And i aslo can't figure out how it make it case insensitive.

[goldest]

After replacing with "-" assign it back to the original String. Like,

letters = letters.replace(guessLetter, "-");

And then print the String again. See what happens?

Goldest

[goldest]

Even you original attempt should also work. Try to evaluate the input though. Have a print statement and check out what actually you receive?

System.out.println(guessLetter);

Goldest

[Petr]

Well It works correct.

public static void main(String[] arg) throws Exception {
         Scanner kb = new Scanner(System.in);
         String value = kb.next();
         String letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
         System.out.println ("Letters not tried yet: " + letters.replace(value, "-"));
     }

A
Letters not tried yet: -BCDEFGHIJKLMNOPQRSTUVWXYZ

May be you are entering a not correct data.

[durdanto]

its working now but how do i make it ignore the case.

for instant, if user type samll s
to arrive at: "ABCDEFGHIJKLMNOPQR-TUVWXYZ"

[durdanto]

I tried equalsIgnoreCase(.....)
it returns True/false though

not "ABCDEFGHIJKLMNOPQR-TUVWXYZ"

[goldest]

Considering that your String contains ONLY Uppercase letters, why don't you convert your input into uppercase when you receive it?

guessLetter = guessLetter.toUpperCase();

Goldest

[durdanto]

Thnaks goldest, it really helped.

[goldest]

Thnaks goldest, it really helped.

Glad to know that.

But make sure to visit the Java API documentation more frequently. You will get some more details over there.

[javaforum$]

Scanner in = new Scanner(System.in);
String curr = "ABCDEFcGHCIJKLMN";
String opt = in.next();//Enter 'c'
System.out.println(curr);
System.out.println(opt);
String lower = opt.toLowerCase();
String upper = opt.toUpperCase();
curr = curr.replace(lower, "-");
curr = curr.replace(upper, "-");
System.out.println(curr);