In this tutorial, We will learn writing java program to Replace First vowel that occurs in the input string with ‘-‘. For any input string, we have to find vowels which occurs very first in the string and print the character after replacing that vowels with ‘-‘.
For example
Case1: If the user enters the string ‘Python is fun’
The output should be ‘Pyth-n is fun’, as the character ‘o’, is first vowel occurs in the string so it is replaced by ‘-‘.
Case2: If the user enters the string ‘Engineer’
The output should be ‘-ngineer’, as the character ‘E’, is first vowel occurs in the string so it is replaced by ‘-‘.
Java Program to Replace First Occurrence of Vowels with ‘-‘ in a String
import java.util.*;
public class Main {
public static void main(String[] args) {
int max_count = 0;
char max_char = Character.MIN_VALUE;
ArrayList<Character> arr = new ArrayList<Character>(
Arrays.asList('a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U'));
System.out.println("Java program to Replace first Vowel With '-' ");
Scanner sc = new Scanner(System.in);
System.out.println("Please enter a String");
String str = sc.nextLine();
StringBuilder tempStr = new StringBuilder(str);
for (int i = 0; i < str.length(); i++) {
if (arr.contains(str.charAt(i))) {
tempStr.setCharAt(i, '-');
break;
}
}
System.out.println("String after replacing first vowel");
System.out.println(tempStr);
}
}
Output
Java program to Replace first Vowel With '-'
Please enter a String
Hitechpoints
String after replacing first vowel
H-techpoints
Explanation
As the input from the user is ‘Hitechpoints’, the output obtained is ‘H-techpointsl’, the for’ loop will iterate with each element of the string and checks for the vowels once it found the first vowel, it replaces the vowel with ‘-‘ and terminates the loop by storing the characters into tempStr variable which is returned as the output.