OnJava8-Examples/collectiontopics/ListSortSearch.java

// collectiontopics/ListSortSearch.java
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Sorting/searching Lists with Collections utilities
import java.util.*;

public class ListSortSearch {
  public static void main(String[] args) {
    List<String> list =
      new ArrayList<>(Utilities.list);
    list.addAll(Utilities.list);
    System.out.println(list);
    Collections.shuffle(list, new Random(47));
    System.out.println("Shuffled: " + list);
    // Use ListIterator to trim off last elements:
    ListIterator<String> it = list.listIterator(10);
    while(it.hasNext()) {
      it.next();
      it.remove();
    }
    System.out.println("Trimmed: " + list);
    Collections.sort(list);
    System.out.println("Sorted: " + list);
    String key = list.get(7);
    int index = Collections.binarySearch(list, key);
    System.out.println(
      "Location of " + key + " is " + index +
      ", list.get(" + index + ") = " +
      list.get(index));
    Collections.sort(list,
      String.CASE_INSENSITIVE_ORDER);
    System.out.println(
      "Case-insensitive sorted: " + list);
    key = list.get(7);
    index = Collections.binarySearch(list, key,
      String.CASE_INSENSITIVE_ORDER);
    System.out.println(
      "Location of " + key + " is " + index +
      ", list.get(" + index + ") = " +
      list.get(index));
  }
}
/* Output:
[one, Two, three, Four, five, six, one, one, Two,
three, Four, five, six, one]
Shuffled: [Four, five, one, one, Two, six, six, three,
three, five, Four, Two, one, one]
Trimmed: [Four, five, one, one, Two, six, six, three,
three, five]
Sorted: [Four, Two, five, five, one, one, six, six,
three, three]
Location of six is 7, list.get(7) = six
Case-insensitive sorted: [five, five, Four, one, one,
six, six, three, three, Two]
Location of three is 7, list.get(7) = three
*/