Collections Data Structure Java

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import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
public class Main {
  public static void main(String[] argv) {
    List sortedList = new LinkedList();
    sortedList.addAll(Arrays.asList(new String[] { "a", "b", "c", "d" }));
    int index = Collections.binarySearch(sortedList, "c");
    System.out.println(index);
    index = Collections.binarySearch(sortedList, "e");
    System.out.println(index);
  }
}