How to check all the present vowels in a string in Java
Harsh JainSolution approach
A vowel is a syllabic speech sound pronounced without any stricture in the vocal tract. The English alphabet has five vowels: A, E, I, O, U.
A String is an object in Java that represents a sequence of characters. The Java String class provides several methods to perform different operations.
To find the vowels in a given string, you need to compare every character in the given string with the vowel letters, which can be done through the charAt() and length() methods.
charAt(): ThecharAt()function in Java is used to read characters at a particular index number.length(): Thelength()function in Java is used to find the length of a string, i.e., the number of characters present in the string.
Syntax
The code snippets below show the syntax of the length() and charAt functions, respectively.
public int length();
public char charAt(int index)
Code
The code below demonstrates how to find all the vowels in a string.
class Vowel {
public static void main(String args[]) {
String str = new String("Hi Welcome to my world!");
for(int i=0; i<str.length(); i++) {
if(str.charAt(i) == 'a'|| str.charAt(i) == 'e'||
str.charAt(i) == 'i' || str.charAt(i) == 'o' ||
str.charAt(i) == 'u')
System.out.println("Given string contains " +
str.charAt(i)+" at the index " + i);
}
}
}
Explanation
The code above performs the following actions.
- In line 5, a
Stringobject is initialized. - In line 6, the
forloop iterates through each character in the string, starting the iteration fromi = 0toi < str.length(). - Lines 7 to 9 check whether the character at index
iis a vowel or not. - If a vowel is found, then line 11 prints the vowel with its corresponding index in the string.
- If no vowel is found, the cursor comes to the next line, and the process is repeated until
i < str.length(), i.e., until all the characters are processed.
Through this process, the for loop, charAt(), and length() functions can check for all the vowels present in a string in Java.
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