Write a program to Input a character and check alphabet digit special characters in java

Hello guys, welcome to lingarajtechhub.com. Today we are going to discuss input a character and check alphabet digit special characters in java.

Code:

package com.Special_Character.java;
import java.util.Scanner;
public class Character {
    public static void main(String[] args) {
		char ch;
		int a;
		Scanner sc=new Scanner(System.in);
		System.out.println("Enter character:");
		ch=sc.next().charAt(0);
	      if((ch>='a'&& ch<='z')||(ch>='A'&& ch<='Z')) 
                   {
		   System.out.println(ch+":it is a  Alphabet");
		}
		else if(ch>='0' && ch<='9')
                    {
		   System.out.println(ch+":it is a digit");
		}
		else if((ch=='*')||(ch=='$')||(ch=='#')||(ch=='@')) 
                   {
		   System.out.println(ch+":Special character");
		}
		else
		     System.out.println("There is no alphabet , digit & special character");
	}

}

Line-1:

package com.Special_Character.java

It is a java package , this package is created in a java project and it contains classes inside the package.

Line-2:

import java.util.Scanner

In java, Scanner is a class. util package used for obtaining the input of the data types like int, double, float , char and strings.

Line-3:

public class Character

“Character” is the class-name , class is a template used to create objects & class-name first letters must be capital. It is public means we can use this outside of the package.

Line-4:

public static void main(String[] args)

It is a main method in which we can execute a program.

public : It is an access modifier. The main() is public because we can access main() outside of the class , if main() can’t be public then JVM(Java Virtual Machine) can’t be called main() & code can’t be executed.
Static : static is a keyword in which the main method has to be static in which JVM can load the class into memory and call the main method without creating an instance.
Void : Void is a data type. It means no return type.
main(): Main is a function.
String [] args : string means collection of characters ,String[] args represents a collection of Strings that are separated by a space and can be typed into the program on the terminal directly.

Line-5:

char ch;

Here “ch” is the variable and char is a data type of the variable.

Line-6:

int a;

Here “a” is the variable and int is a data type of the variable.

Line-7:

Scanner sc=new Scanner(System.in);

Scanner is a class and sc is the instance of the object which is the new Scanner . System.in is an argument.

Line-8:

System.out.println(“Enter character:”);

System is a class name and out is the instance of the system. Println is to print the new line.

Line-9:

ch=sc.next().charAt(0);

ch is a variable that we take and sc is our instance name which is created for an object and next() is a method of a Scanner object.The charAt() method returns the character at the specified index in a string. The index of the first character is 0, the second character is 1, and so on.

Line-10 to Line-23:

if((ch>=’a’&& ch<=’z’)||(ch>=’A’&& ch<=’Z’)) {

System.out.println(ch+”:it is an Alphabet”);

} else if(ch>=’0′ && ch<=’9′) {

System.out.println(ch+”:it is a digit”);

} else if((ch==’*’)||(ch==’$’)||(ch==’#’)||(ch==’@’)) {

System.out.println(ch+”:Special character”);

} else

System.out.println(“There is no alphabet , digit & special character”);

Here we used the “Else-If” condition .It is going to check the logic if the logic is true then it prints the statement, if the “if block” condition is false then it checks the “ else if” block then it checks the “else” block and shows the output.