Arrays - Java Software Solutions: Foundations of Program Design - page 387

LISTING 8.3 continued

Scanner scan = new Scanner (System.in);

int [] upper = new int [NUMCHARS];
int [] lower = new int [NUMCHARS];

char current; // the current character being processed
int other = 0; // counter for non-alphabetics

System.out.println ("Enter a sentence:");
String line = scan.nextLine();

// Count the number of each letter occurrence
for ( int ch = 0; ch < line.length(); ch++)
{
current = line.charAt(ch);
if (current >= 'A' && current <= 'Z')
upper[current-'A']++;
else
if (current >= 'a' && current <= 'z')
lower[current-'a']++;
else
other++;
}

// Print the results
System.out.println ();
for ( int letter=0; letter < upper.length; letter++)
{
System.out.print ( ( char ) (letter + 'A') );
System.out.print (": " + upper[letter]);
System.out.print ("\t\t" + ( char ) (letter + 'a') );
System.out.println (": " + lower[letter]);
}

System.out.println ();
System.out.println ("Non-alphabetic characters: " + other);
}
}