// Fig. 17.11: ArraysAndStreams.java
// Demonstrating lambdas and streams with an array of Integers.
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class ArraysAndStreams {
   public static void main(String[] args) {
      Integer[] values = {2, 9, 5, 0, 3, 7, 1, 4, 8, 6};

      // display original values
      System.out.printf("Original values: %s%n", Arrays.asList(values));

      // sort values in ascending order with streams
      System.out.printf("Sorted values: %s%n", 
         Arrays.stream(values)              
               .sorted()                    
               .collect(Collectors.toList()));

      // values greater than 4
      List<Integer> greaterThan4 =           
         Arrays.stream(values)               
               .filter(value -> value > 4)   
               .collect(Collectors.toList());
      System.out.printf("Values greater than 4: %s%n", greaterThan4);

      // filter values greater than 4 then sort the results
      System.out.printf("Sorted values greater than 4: %s%n",
         Arrays.stream(values)              
               .filter(value -> value > 4)  
               .sorted()                    
               .collect(Collectors.toList()));

      // greaterThan4 List sorted with streams
      System.out.printf(
         "Values greater than 4 (ascending with streams): %s%n",
         greaterThan4.stream()              
               .sorted()                    
               .collect(Collectors.toList()));
   }
}


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