1. Comparator example using Lambda and Comparator.comparing corrected.
This commit is contained in:
parent
352af1c6c5
commit
8af39bf730
|
@ -17,8 +17,8 @@ public class Java8ComparatorUnitTest {
|
|||
@Before
|
||||
public void setUp() {
|
||||
footballTeam = new ArrayList<Player>();
|
||||
Player player1 = new Player(59, "John", 20);
|
||||
Player player2 = new Player(67, "Roger", 22);
|
||||
Player player1 = new Player(59, "John", 22);
|
||||
Player player2 = new Player(67, "Roger", 20);
|
||||
Player player3 = new Player(45, "Steven", 24);
|
||||
footballTeam.add(player1);
|
||||
footballTeam.add(player2);
|
||||
|
@ -26,15 +26,9 @@ public class Java8ComparatorUnitTest {
|
|||
}
|
||||
|
||||
@Test
|
||||
public void whenComparing_UsingJava8_thenSorted() {
|
||||
public void whenComparing_UsingLambda_thenSorted() {
|
||||
System.out.println("************** Java 8 Comaparator **************");
|
||||
Comparator<Player> byRanking = new Comparator<Player>() {
|
||||
|
||||
@Override
|
||||
public int compare(Player player1, Player player2) {
|
||||
return player1.getRanking() - player2.getRanking();
|
||||
}
|
||||
};
|
||||
Comparator<Player> byRanking = (Player player1, Player player2) -> player1.getRanking() - player2.getRanking();
|
||||
|
||||
System.out.println("Before Sorting : " + footballTeam);
|
||||
Collections.sort(footballTeam, byRanking);
|
||||
|
@ -48,8 +42,8 @@ public class Java8ComparatorUnitTest {
|
|||
@Test
|
||||
public void whenComparing_UsingComparatorComparing_thenSorted() {
|
||||
System.out.println("********* Comaparator.comparing method *********");
|
||||
Comparator<Player> byRanking =
|
||||
(Player player1, Player player2)->player1.getRanking()-player2.getRanking();
|
||||
System.out.println("********* byRanking *********");
|
||||
Comparator<Player> byRanking = Comparator.comparing(Player::getRanking);
|
||||
|
||||
System.out.println("Before Sorting : " + footballTeam);
|
||||
Collections.sort(footballTeam, byRanking);
|
||||
|
@ -58,6 +52,17 @@ public class Java8ComparatorUnitTest {
|
|||
.getName(), "Steven");
|
||||
assertEquals(footballTeam.get(2)
|
||||
.getRanking(), 67);
|
||||
|
||||
System.out.println("********* byAge *********");
|
||||
Comparator<Player> byAge = Comparator.comparing(Player::getAge);
|
||||
|
||||
System.out.println("Before Sorting : " + footballTeam);
|
||||
Collections.sort(footballTeam, byAge);
|
||||
System.out.println("After Sorting : " + footballTeam);
|
||||
assertEquals(footballTeam.get(0)
|
||||
.getName(), "Roger");
|
||||
assertEquals(footballTeam.get(2)
|
||||
.getRanking(), 45);
|
||||
}
|
||||
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue