How do i put together JOptionPane and letter counter to work?

[majorecono]

I took a look at the site and found this as a counter. Is there any way I can use it in a dialog box, that asks user to input any number of letters in a (?)dialog box, pressing enter and out comes Number of upper/lower case e's in the (I)dialog box. Also have it repeat process until user enters Stop. Well yeah, thanks if anyone can help put that up tonight..



String str = "Count" ;

char ch = 'e';
char ch2 = 'E';

int count = 0 ;
int counter = 0;
int pos = -1 ;

while( ( pos = str.indexOf( ch, pos + 1 ) ) > -1 ) count++ ;

System.out.println( "Number of lower case e's: + count + " ) ;

while( ( pos = str.indexOf( ch2, pos + 1 ) ) > -1 ) counter++ ;

System.out.println( "Number of upper case e's + counter + " ) ;

[r035198x]

I took a look at the site and found this as a counter. Is there any way I can use it in a dialog box, that asks user to input any number of letters in a (?)dialog box, pressing enter and out comes Number of upper/lower case e's in the (I)dialog box. Also have it repeat process until user enters Stop. Well yeah, thanks if anyone can help put that up tonight..



String str = "Count" ;

char ch = 'e';
char ch2 = 'E';

int count = 0 ;
int counter = 0;
int pos = -1 ;

while( ( pos = str.indexOf( ch, pos + 1 ) ) > -1 ) count++ ;

System.out.println( "Number of lower case e's: + count + " ) ;

while( ( pos = str.indexOf( ch2, pos + 1 ) ) > -1 ) counter++ ;

System.out.println( "Number of upper case e's + counter + " ) ;

1.) Use code tags when posting code.
2.) Where are you checking for upper case and lower case? Check out the Character class for the relevant methods.

[Nepomuk]

I took a look at the site and found this as a counter. Is there any way I can use it in a dialog box, that asks user to input any number of letters in a (?)dialog box, pressing enter and out comes Number of upper/lower case e's in the (I)dialog box. Also have it repeat process until user enters Stop. Well yeah, thanks if anyone can help put that up tonight..



String str = "Count" ;

char ch = 'e';
char ch2 = 'E';

int count = 0 ;
int counter = 0;
int pos = -1 ;

while( ( pos = str.indexOf( ch, pos + 1 ) ) > -1 ) count++ ;

System.out.println( "Number of lower case e's: + count + " ) ;

while( ( pos = str.indexOf( ch2, pos + 1 ) ) > -1 ) counter++ ;

System.out.println( "Number of upper case e's + counter + " ) ;

That is one possibility to go through it, but it'll be a lot of unnecessary coding. As r035198x said, check the Character class. Also, I'd just go through the String once and in that loop check if the given Character is upper or lower case. You're code would look something like this:

String str = "Count";
int lower = 0;
int upper = 0;
while(int i=0; i<str.length(); i++)
{
   if (...)      // Check, if str.charAt(i) is lower case
      lower++;
   else if (...) // Check, if str.charAt(i) is upper case
      upper++;
}
 

Greetings,
Nepomuk