Java programming Exercises: Reverse the words of length higher than 3 in a given string
Java Regular Expression: Exercise-28 with Solution
Write a Java program to reverse the words of length higher than 3 in a given string.
Sample Solution:
Java Code:
import java.lang.StringBuilder;
public class test {
public static void main(String[] args) {
String text ="Add a dash before and after every vowel in the said string:";
System.out.println("Original string: "+text);
System.out.println("Reverse the words of length higher than 3 in the said string:\n"+validate(text));
text ="The quick brown fox jumps over the lazy dog.";
System.out.println("\nOriginal string: "+text);
System.out.println("Reverse the words of length higher than 3 in the said string:\n"+validate(text));
}
public static String validate(String text) {
String[] words = text.split(" ");
StringBuilder result_str = new StringBuilder();
for (String word : words) {
if (word.length() >= 4) {
result_str.append(new StringBuilder(word).reverse());
} else {
result_str.append(word);
}
result_str.append(" ");
}
return result_str.toString().trim();
}
}
Sample Output:
Original string: Add a dash before and after every vowel in the said string: Reverse the words of length higher than 3 in the said string: Add a hsad erofeb and retfa yreve lewov in the dias :gnirts Original string: The quick brown fox jumps over the lazy dog. Reverse the words of length higher than 3 in the said string: The kciuq nworb fox spmuj revo the yzal .god
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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