Thread: text.length method problem?

Originally Posted by computercoder

I am attempting to create a program that counts the number of vowels in a sentence or text, which is inputted by the user.
PROBLEM: I am trying to use the length of the string to continue my loop until the very last character has been reached. However, the text.length only recognizes the first word and stops after spaces.

import java.util.*;
 
public class Vowels{
  public static void main(String[] args){
    Scanner console = new Scanner(System.in);
 
    int counter= 0;
    System.out.println("Input a sequence of characters");
    String text = console.nextLine();
 
    for (int loop = 0; loop < text.length(); loop++){
      char lett = text.charAt(loop);
      if (lett=='a' || lett=='e' || lett=='i' || lett=='o' || lett=='u' || lett=='A' || lett=='E' || lett=='I' || lett=='O' || lett=='U') {
        counter++;
      }
    }
    System.out.println("There are " + counter + " vowels in the inputted text.");
  }

String.trim() will return a copy of the String without trailing and preceding whitespaces.

The number of vowels in that String should be the same as the full String that has the spaces.

import java.util.*;
 
public class Vowels{
  public static void main(String[] args){
    static Scanner console = new Scanner(System.in);
 
    int counter= 0;
    System.out.println("Input a sequence of characters");
    String text = console.nextLine();
    String shorterString = text.trim();  
 
    for (int loop = 0; loop < shorterString.length(); loop++){
      char lett = shorterString.charAt(loop);
      if (lett=='a' || lett=='e' || lett=='i' || lett=='o' || lett=='u' || lett=='A' || lett=='E' || lett=='I' || lett=='O' || lett=='U') {
        counter++;
      }
    }
    System.out.println("There are " + counter + " vowels in the inputted text.");
  }

Also, maybe Zula is right. Maybe we don't need to have the second String.

Hmmm. Maybe console needs to be static.

Yep, now it works:

import java.util.*;
 
public class Vowels{
	static Scanner console = new Scanner(System.in);
  public static void main(String[] args){
 
 
 
 
    int counter= 0;
    System.out.println("Input a sequence of characters");
    String text = console.nextLine();
    String shorterString = text.trim();  
 
    for (int loop = 0; loop < shorterString.length(); loop++){
      char lett = shorterString.charAt(loop);
      if (lett=='a' || lett=='e' || lett=='i' || lett=='o' || lett=='u' || lett=='A' || lett=='E' || lett=='I' || lett=='O' || lett=='U') {
        counter++;
      }
    }
    System.out.println("There are " + counter + " vowels in the inputted text.");
  }
}

Seems to work for me...

import java.util.*;
 
public class Vowels2{
  public static void main(String[] args){
    Scanner console = new Scanner(System.in);
 
    int counter= 0;
    System.out.println("Input a sequence of characters");
    String text = console.nextLine();
 
    for (int loop = 0; loop < text.length(); loop++){
      char lett = text.charAt(loop);
      if (lett=='a' || lett=='e' || lett=='i' || lett=='o' || lett=='u' || lett=='A' || lett=='E' || lett=='I' || lett=='O' || lett=='U') {
        counter++;
      }
    }
    System.out.println("There are " + counter + " vowels in the inputted text.");
  }
}

I get
Input a sequence of characters
a a <-----my input
There are 2 vowels in the inputted text.

Input a sequence of characters
You kicked my dog!
There are 5 vowels in the inputted text.