Java || Count The Total Number Of Characters, Vowels, & UPPERCASE Letters Contained In A Sentence Using A ‘For Loop’
Here is a simple program, which demonstrates more practice using the input/output mechanisms which are available in Java.
This program will prompt the user to enter a sentence, then upon entering an “exit code,” will display the total number of uppercase letters, vowels and characters which are contained within that sentence. This program is very similar to an earlier project, this time, utilizing a for loop, strings, and user defined methods.
REQUIRED KNOWLEDGE FOR THIS PROGRAM
How To Get String Input
If/Else Statements
For Loops
Methods (A.K.A "Functions") - What Are They?
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 |
import java.util.Scanner; public class VowelCount { public static void main(String[] args) { // declare variables int numUpperCase = 0; int numVowel = 0; int numChars = 0; char character = ' '; String userInput= " "; Scanner cin = new Scanner(System.in); // display message to screen System.out.println("nWelcome to My Programming Notes' Java Program."); System.out.print("Enter a sentence, ending with a period: "); userInput = cin.nextLine(); // loop thru the string until we reach the 'exit code' for(int index=0; userInput.charAt(index) != '.'; ++index) { character = userInput.charAt(index); // do nothing, we dont care about whitespace if(character == ' ') { continue; } // check to see if entered data is UPPERCASE if((character >= 'A')&&(character <= 'Z')) { ++numUpperCase; // Increments Total number of uppercase by one } // check to see if entered data is a vowel if((character == 'a')||(character == 'A')||(character == 'e')|| (character == 'E')||(character == 'i')||(character == 'I')|| (character == 'o')||(character == 'O')||(character == 'u')|| (character == 'U')||(character == 'y')||(character == 'Y')) { ++numVowel; // increment total number of vowels by one } ++numChars; // increment total number of chars by one } setwf("ntTotal number of upper case letters:", 45,'.'); System.out.println(numUpperCase); setwf("tTotal number of vowels:", 44,'.'); System.out.println(numVowel); setwf("tTotal number of characters:", 44,'.'); System.out.println(numChars); }// end of main public static void setwf(String str, int width, char fill) {// this mimics the C++ 'setw' function & formats string output to the screen System.out.print(str); for (int x = str.length(); x < width; ++x) { System.out.print(fill); } }// end of setwf }// http://programmingnotes.org/ |
QUICK NOTES:
The highlighted portions are areas of interest.
Notice line 22 contains the for loop declaration. The loop will continually loop thru the string, and will not stop doing so until it reaches an exit character, and the defined exit character in this program is a period (“.”). So, the program will not stop looping thru the string until it reaches a period.
Once compiling the above code, you should receive this as your output
Welcome to My Programming Notes' Java Program.Enter a sentence, ending with a period:
My Programming Notes Is An Awesome Site.Total number of upper case letters:........7
Total number of vowels:....................14
Total number of characters:................33
Hi, I'm a software engineer. I write articles about programming and design in my spare time.
Leave a Reply