Java programming Exercises: Find sequences of lowercase letters joined with a underscore
Java Regular Expression: Exercise-3 with Solution
Write a Java program to find sequences of lowercase letters joined with a underscore.
Sample Solution:
Java Code:
import java.util.Scanner;
public class test {
public static void main(String[] args) {
System.out.println(validate("java_exercises"));
System.out.println(validate("Java_exercises"));
System.out.println(validate("java_Exercises"));
System.out.println(validate("Java_Exercises"));
}
public static String validate(String text) {
if (text.matches("^[a-z]+_[a-z]+$"))
return "Found a match!";
else
return "Not matched!";
}
}
Sample Output:
Found a match! Not matched! Not matched! Not matched!
Pictorial Presentation:
Flowchart :
Java Code Editor:
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Java: Tips of the Day
How to sort an ArrayList?
Collections.sort(testList); Collections.reverse(testList);
That will do what you want. Remember to import Collections though!
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