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Java Reverse String Array Example

  1. /*
  2.         Java Reverse String Array Example
  3.         This Java Reverse String Array example shows how to find sort an array of
  4.         String in Java using Arrays and Collections classes.
  5.  */
  6.  
  7. import java.util.Collections;
  8. import java.util.List;
  9. import java.util.Arrays;
  10.  
  11. public class ReverseStringArrayExample {
  12.        
  13.         public static void main(String args[]){
  14.                
  15.                 //String array
  16.                 String[] strDays = new String[]{"Sunday", "Monday", "Tuesday", "Wednesday"};
  17.                
  18.                 /*
  19.                  * There are basically two methods, one is to use temporary array and
  20.                  * manually loop through the elements of an Array and swap them or to use
  21.                  * Arrays and Collections classes.
  22.                  *
  23.                  * This example uses the second approach i.e. without temp variable.
  24.                  *
  25.                  */
  26.                
  27.                 //first create a list from String array
  28.                 List<String> list = Arrays.asList(strDays);
  29.                
  30.                 //next, reverse the list using Collections.reverse method
  31.                 Collections.reverse(list);
  32.                
  33.                 //next, convert the list back to String array
  34.                 strDays = (String[]) list.toArray();
  35.                
  36.                 System.out.println("String array reversed");
  37.                
  38.                 //print the reversed String array
  39.                 for(int i=0; i < strDays.length; i++){
  40.                         System.out.println(strDays[i]);
  41.                 }
  42.                
  43.         }
  44.  
  45. }
  46.  
  47. /*
  48. Output of above given Java Reverse String Array example would be
  49. String array reversed
  50. Wednesday
  51. Tuesday
  52. Monday
  53. Sunday
  54. */

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