List an Array of Strings in alphabetical order

Question

I have a program which has the user inputs a list of names  I have a switch case going to a function which I would like to have the names print off in alphabetical order   public static void orderedGuests String   hotel               I have tried both    Arrays sort hotel   System out println Arrays toString hotel      and  java util Collections sort hotel

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With the help of this code u not just sort the arrays in alphabetical order but also can take string from user or console or keyboard  import java util Scanner  import java util Arrays  public class ReadName   final static int ARRAY ELEMENTS   3  public static void main String   args    String   theNames   new String 5   Scanner keyboard   new Scanner System in   System out println  Enter the names      for  int i 0 i lt theNames length  i                  theNames i    keyboard nextLine      System out println                            Arrays sort theNames   for  int i 0 i lt theNames length  i       System out println  Name are     theNames i

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CompareTo   method  The two strings are compared based on Unicode character values   import java util     public class Test    int n i temp  String names n    public static void main String   args    String names 5      Brian   Joshua   Louis   David   Marcus     for i 0 i lt 5 i         for j i 1 i lt n j             if names i  CompareTo names j  gt 0                 temp names i                names i  names j                names j  temp             else              System out println  Alphabetically Ordered

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The first thing you tried seems to work fine   Here is an example program  Press the  Start  button at the top of this page to run it to see the output yourself   import java util Arrays   public class Foo      public static void main String   args            String    stringArray     ab    aB    c    0    2    1Ad    a10            orderedGuests stringArray              public static void orderedGuests String   hotel                Arrays sort hotel           System out println Arrays toString hotel

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Here is code that works   import java util Arrays  import java util Collections   public class Test       public static void main String   args                orderedGuests1 new String      c    a    b              orderedGuests2 new String      c    a    b                 public static void orderedGuests1 String   hotel                Arrays sort hotel           System out println Arrays toString hotel               public static void orderedGuests2 String   hotel                Collections sort Arrays asList hotel            System out println Arrays toString hotel

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Weird  your code seems to work for me   import java util Arrays   public class Test       public static void main String   args                   args is the list of guests         Arrays sort args           for int i   0  i  lt  args length  i                System out println args i              I ran that code using  java Test Bobby Joe Angel  and here is the output     java Test Bobby Joe Angel Angel Bobby Joe

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public static String   textSort String   words        for  int i   0  i  lt  words length  i              for  int j   i   1  j  lt  words length  j                  if  words i  compareTo words j    gt  0                    String temp   words i                   words i    words j                   words j    temp                                     return words

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java util Collections sort listOfCountryNames  Collator getInstance

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Arrays sort stringArray   This sorts the string array based on the Unicode characters values  All strings that contain uppercase characters at the beginning of the string will be at the top of the sorted list alphabetically followed by all strings with lowercase characters   Hence if the array contains strings beginning with both uppercase characters and lowercase characters  the sorted array would not return a case insensitive order alphabetical list   String   strArray      Carol    bob    Alice     Arrays sort strList   System out println Arrays toString hotel      Output is   Alice  Carol  bob    If you require the Strings to be sorted without regards to case  you ll need a second argument  a Comparator  for Arrays sort    Such a comparator has already been written for us and can be accessed as a static on the String class named CASE INSENSITIVE ORDER   String   strArray      Carol    bob    Alice     Arrays sort stringArray  String CASE INSENSITIVE ORDER   System out println Arrays toString strArray       Output is   Alice  bob  Carol

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You can just use Arrays sort     it s working perfectly   See this example    String    a     English   German   Italian   Korean   Blablablabla        before sort for int i   0 i lt a length i        System out println a i      Arrays sort a   System out println  After sort      for int i   0 i lt a length i        System out println a i

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You can use Arrays sort   method  Here s the example   import java util Arrays   public class Test        public static void main String   args                 String arrString        peter    taylor    brooke    frederick    cameron             orderedGuests arrString              public static void orderedGuests String   hotel                Arrays sort hotel           System out println Arrays toString hotel              Output   brooke  cameron  frederick  peter  taylor

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By alphabetical-order I assume the order to be   A a  lt  B b  lt  C c    Hope this is what  Nick is or was  looking for and the answer follows the above assumption  I would suggest to have a class implement compare method of Comparator-interface as   public int compare Object o1  Object o2        return o1 toString   compareToIgnoreCase o2 toString        and from the calling method invoke the Arrays sort method with custom Comparator as   Arrays sort inputArray  customComparator    Observed results  input Array    quot Vani quot   quot Kali quot    quot Mohan quot   quot Soni quot   quot kuldeep quot   quot Arun quot  output Alphabetical-order  is   Arun  Kali  kuldeep  Mohan  Soni  Vani Output Natural-order by executing Arrays sort inputArray  is   Arun  Kali  Mohan  Soni  Vani  kuldeep Thus in case of natural ordering   Vani  lt  kuldeep  which to my understanding of alphabetical-order is not the thing desired  for more understanding of natural and alphabetical lexical order visit  discussion here

[java] List an Array of Strings in alphabetical order

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