Java programming Exercises: Replace all the vowels in a given string with a specified character
Java Regular Expression: Exercise-16 with Solution
Write a Java program to replace all the vowels in a given string with a specified character.
Sample Solution-1:
Java Code:
public class test {
public static void main(String[] args) {
String text ="LOWERED";
System.out.println("Original string: "+text);
System.out.println("After replacing vowel(s) with specified Character: "+validate(text, '#'));
text ="Java";
System.out.println("\nOriginal string: "+text);
System.out.println("After replacing vowel(s) with specified Character: "+validate(text, '*'));
text ="MID-CENTRALIZED";
System.out.println("\nOriginal string: "+text);
System.out.println("After replacing vowel(s) with specified Character: "+validate(text, '^'));
text ="C++";
System.out.println("\nOriginal string: "+text);
System.out.println("After replacing vowel(s) with specified Character: "+validate(text, '@'));
}
public static String validate(String text, char chr) {
return text.replaceAll("[aeiouAEIOU]", "" + chr);
}
}
Sample Output:
Original string: LOWERED After replacing vowel(s) with specified Character: L#W#R#D Original string: Java After replacing vowel(s) with specified Character: J*v* Original string: MID-CENTRALIZED After replacing vowel(s) with specified Character: M^D-C^NTR^L^Z^D Original string: C++ After replacing vowel(s) with specified Character: C++
Pictorial Presentation:
Flowchart :
Sample Solution-2:
Java Code:
public class test {
public static void main(String[] args) {
String text ="LOWERED";
System.out.println("Original string: "+text);
System.out.println("After replacing vowel(s) with specified Character: "+validate(text, '#'));
text ="Java";
System.out.println("\nOriginal string: "+text);
System.out.println("After replacing vowel(s) with specified Character: "+validate(text, '*'));
text ="MID-CENTRALIZED";
System.out.println("\nOriginal string: "+text);
System.out.println("After replacing vowel(s) with specified Character: "+validate(text, '^'));
text ="C++";
System.out.println("\nOriginal string: "+text);
System.out.println("After replacing vowel(s) with specified Character: "+validate(text, '@'));
}
public static String validate(String text, char chr) {
return text.replaceAll( "(?i)[aeiou]", String.valueOf(chr));
}
}
Sample Output:
Original string: LOWERED After replacing vowel(s) with specified Character: L#W#R#D Original string: Java After replacing vowel(s) with specified Character: J*v* Original string: MID-CENTRALIZED After replacing vowel(s) with specified Character: M^D-C^NTR^L^Z^D Original string: C++ After replacing vowel(s) with specified Character: C++
Flowchart :
Java Code Editor:
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Java: Tips of the Day
What is the best way to filter a Java Collection?
Java 8 (2014) solves this problem using streams and lambdas in one line of code:
List<Person> beerDrinkers = persons.stream() .filter(p -> p.getAge() > 16).collect(Collectors.toList());
Use Collection#removeIf to modify the collection in place. (Notice: In this case, the predicate will remove objects who satisfy the predicate):
persons.removeIf(p -> p.getAge() <= 16);
lambdaj allows filtering collections without writing loops or inner classes:
ListbeerDrinkers = select(persons, having(on(Person.class).getAge(), greaterThan(16)));
Ref: https://bit.ly/3uwYid6
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