Java Program:

Example:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

import java.util.Scanner;
public class Alphabets {
  public static void main(String []args) {
    char c='A';
    System.out.println("Alphabets from A to Z :");
    for(int i=0; i<26; i++)
      System.out.print(c++ +" ");
  }
}

Output:

Alphabets from A to Z :
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Here, we just used 'for loop' for 26 alphabet characters

char c='A'; //set the 1st character 
for(int i=0; i<26; i++)
  System.out.print(c++ +" ");

You can print the same in small alphabets, just set c='a'