java alphabetical order code example

Example 1: Arrange words of a sentence in alphabetical order in java

// Arrange words of a sentence in alphabetical order in java
import java.util.Set;
import java.util.StringTokenizer;
import java.util.TreeSet;
public class ArrangeInAlphabeticalOrder 
{
   public static void main(String[] args) 
   {
      Set set = new TreeSet();
      String strInput = "hi all welcome to flower brackets blog";
      System.out.println("Before arranging sentence in alphabetical order: " + strInput);
      StringTokenizer strToken = new StringTokenizer(strInput," ");
      while(strToken.hasMoreElements())
      {
         set.add(strToken.nextElement());
      }
      System.out.println("After arranging sentence in alphabetical order: " + set);
   }
}

Example 2: Java program to sort names in an alphabetical order

import java.util.Scanner;
public class SortNamesAlphabeticalOrder
{
   public static void main(String[] args)
   {
      int number;
      String str;
      Scanner sc1 = new Scanner(System.in);
      System.out.println("Please enter number of strings: ");
      number = sc1.nextInt();
      String[] names = new String[number];
      Scanner sc2 = new Scanner(System.in);
      System.out.println("Enter all strings: ");
      for(int a = 0; a < number; a++)
      {
         names[a] = sc2.nextLine();
      }
      for(int a = 0; a < number; a++)
      {
         for(int b = a + 1; b < number; b++)
         {
            // java alphabetical sort
            if(names[a].compareTo(names[b]) > 0)
            {
               str = names[a];
               names[a] = names[b];
               names[b] = str;
            }
         }
      }
      System.out.println("After sorting names in an alphabetical order: ");
      for(int a = 0; a < number - 1; a++)
      {
         System.out.println(names[a] + ", ");
      }
      System.out.print(names[number - 1]);
      sc1.close();
      sc2.close();
   }
}

Example 3: string sorting in java

public class ArrayReturn3 {
 
    public static String[] sortNames(String[] userNames) {
        String temp;
        for (int i = 0; i < userNames.length; i++) {
            for (int j = i + 1; j < userNames.length; j++) {
                if (userNames[i].compareTo(userNames[j]) > 0) {
                    temp = userNames[i];
                    userNames[i] = userNames[j];
                    userNames[j] = temp;
                }
            }
        }
        return userNames;
    }
 
    public static void main(String[] args) {
        String[] names = {"Ram", "Mohan", "Sohan", "Rita", "Anita", "Nita", "Shyam", "Mukund"};
        System.out.println("Names before sort");
        for (String n : names) {
            System.out.print(" " + n);
        }
        String[] sortedNames = sortNames(names);
        System.out.println("\nNames after sort (Sent name)");
        for (String n : names) {
            System.out.print(" " + n);
        }
        System.out.println("\nNames after sort (Received name)");
        for (String n : sortedNames) {
            System.out.print(" " + n);
        }
    }
}