How to write Pangram checker program in java using String?

     Pangram is a sentence which has all English alphabets at least once in it. Some of the examples of pangram sentences are given below.

• ·       Brown jars prevented the mixture from freezing too quickly
• ·       How vexingly quick daft zebras jump
• ·       The quick brown fox jumps over a lazy dog

Let us create this program in java using String.

Steps:

• ·       Import the built in packages java.util.HashSet,java.util.Set,java.util.Scanner.
• ·       Create a class PangramCheckeralphabet.
• ·       Member function: isitPangram ()
• ü  This function takes the input as sentence to be checked.
• ü  It checks the given sentence is null or not. If it is not null,then proceed the function.
• ü  Create an object for HashSet.
• ü  Check the sentence for all alphabets at least once.
• ü  Return the number.
• ·       Main() function:
• ü  It creates a scanner object.
• ü  Read the input from the user and pass it to isitPangram() function.
• ü  Get the value from the function. if it is true, then print it is a pangram sentence.
• ü  Otherwise, print it is not pangram sentence.

Program:

import java.util.HashSet;

import java.util.Set;

import java.util.Scanner;

//Creating a public class

public class PangramCheckeralphabet {

    public static boolean isitPangram(String asentence) {

        if (asentence == null) {

            return false;

        }

        Set<Character> alphabetSet = new HashSet<>();

        for (char c : asentence.toLowerCase().toCharArray()) {

            if (c >= 'a' && c <= 'z') {

                alphabetSet.add(c);

            }

        }

        return alphabetSet.size() == 26;

    }

//Main function

    public static void main(String[] args) {

        Scanner myObj1 = new Scanner(System.in);

        System.out.println("Enter the sentence to check for pangram");

        String asentence = myObj1.nextLine();

        if (isitPangram(asentence)) {

            System.out.println("Yes.It is a pangram sentence.");

        } else {

            System.out.println("No. It is not a pangram sentence.");

        }

}

}

Output:   

There are two outputs given below.

C:\raji\blog>javac PangramCheckeralphabet.java

C:\raji\blog>java PangramCheckeralphabet

Enter the sentence to check for pangram

Brown jars prevented the mixture from freezing too quickly

Yes.It is a pangram sentence.

 

C:\raji\blog>java PangramCheckeralphabet

Enter the sentence to check for pangram

It is a new sentence

No. It is not a pangram sentence.

This is one of the efficient way of creating pangram checker program in java. Try this with your input sentence and enjoy coding!!!