// ************************************************************************************************************************
// what's wrong with this code?
// ************************************************************************************************************************

public class Person {

    private String firstName;
    private String lastName;

    public void setName(String firstName, String lastName) {
        this.firstName = firstName;
        this.lastName = lastName;
    }

    public String getName() {
        return this.firstName + " " + this.lastName;
    }

    public static void printName() {
        System.out.println(this.firstName + " " + this.lastName);
    }

}




// ************************************************************************************************************************
// rewrite the following as a lamba statement
// ************************************************************************************************************************

new Thread(new Runnable() {
    @Override
    public void run() {
        System.out.println("Hello world!");
    }
});




// ************************************************************************************************************************
// what is the value of the variable "i"?
// ************************************************************************************************************************

byte[] bytes = {(byte)0x82, (byte)0x19, (byte)0x02};
int i = (0xF & bytes[0]) + (bytes[1] >>> 4) + (bytes[2] | 0x01);




// ************************************************************************************************************************
// how would you rewrite the following with a method reference?
// ************************************************************************************************************************

Arrays.asList("one", "two", "three").forEach(n -> System.out.println(n));




// ************************************************************************************************************************
// a. what's wrong with this code?
// ************************************************************************************************************************

@FunctionalInterface
public interface FooBar {

    public void foo(int num);

    public void bar(String str);

    default void xar(String str) {
        System.out.println(str);
    }

}

// =============================================================================
// b. explain the default keywork
// =============================================================================




// ************************************************************************************************************************
// use the stream API to produce the desired result
// ************************************************************************************************************************

public class Person {

    @Getter
    private String name;

    @Getter
    private int age;

    Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

}

List<Person> people = Arrays.asList(
    new Person("David", 22);
    new Person("Nancy", 37);
    new Person("Julie", 23);
    new Person("Joe",   15);
    new Person("Julie", 12);
    new Person("David", 38);
    new Person("Nancy", 22);
    new Person("Vicky", 72);
    new Person("Steve", 20);
    new Person("Ed",    89);
);

// use the list of Person objects to create an ArrayList of sorted names
// Conditions:
//  - age is greater than or equal to 20
//  - age is less than or equal to 80
//  - names are sorted alphbetically
//  - no name appears more than once
// Result should be:
//  - ["David", "Julie", "Nancy", "Steve", "Vicky"];




// ************************************************************************************************************************
// a. what's wrong with this code?
// ************************************************************************************************************************

int totalOdds = 0;
IntStream.range(1, 9)
    .filter(n -> !(n % 2 == 0))
    .forEach(n -> totalOdds += n);

// =============================================================================
// b. how would you refactor to maintain the lambda statements but make it
// compile?
// =============================================================================