// Comparator with lambda
public void ComparatorTest() {
List<Person> personList = Person.createShortList();
// Sort with inner class
Collections.sort(
personList,
new Comparator<Person>() {
public int compare(Person p1, Person p2) {
return p1.getSurName().compareTo(p2.getSurName());
}
});
System.out.println("=== Sorted Asc SurName===");
for (Person p : personList) {
p.printName();
}
// Sort using lambda
System.out.println("=== Sorted Asc SurName ===");
Collections.sort(
personList, (Person p1, Person p2) -> p1.getSurName().compareTo(p2.getSurName()));
for (Person p : personList) {
p.printName();
}
System.out.println("=== Sorted Desc SurName ===");
Collections.sort(
personList, (Person p1, Person p2) -> p2.getSurName().compareTo(p1.getSurName()));
for (Person p : personList) {
p.printName();
}
}
public void Test4ToSum() {
List<Person> pl = Person.createShortList();
SearchCriteria search = SearchCriteria.getInstance();
// Old style sum
int sum = 0;
int count = 0;
for (Person p : pl) {
if (p.getAge() >= 23 && p.getAge() <= 65) {
sum = sum + p.getAge();
count++;
}
}
long average = sum / count;
System.out.println("\n=== Total ages : " + sum);
System.out.println("\n=== Average age : " + average);
System.out.println("\n=== Calc new style ===");
// Get sum of ages
long totalAges =
pl.stream()
.filter(search.getCriteria(Constants.ALL_DRAFTEES))
.mapToInt(p -> p.getAge())
.sum();
// Get average of ages
OptionalDouble averageAge =
pl.stream()
.filter(search.getCriteria(Constants.ALL_DRIVERS))
.mapToDouble(p -> p.getAge())
.average();
System.out.println("\n=== Total ages : " + totalAges);
System.out.println("\n=== Average age : " + averageAge);
}
public void Test3ToList() {
List<Person> pl = Person.createShortList();
SearchCriteria search = SearchCriteria.getInstance();
// Make a list after filtering
List<Person> pilotList =
pl.stream().filter(search.getCriteria(Constants.ALL_PILOTS)).collect(Collectors.toList());
System.out.println("\n=== Western Pilot Phone List ===");
pilotList.forEach(Person::printEasternName);
}
public void Test2Filter() {
List<Person> pl = Person.createShortList();
SearchCriteria search = SearchCriteria.getInstance();
System.out.println("\n=== Western Pilot Phone List ===");
pl.stream().filter(search.getCriteria(Constants.ALL_PILOTS)).forEach(Person::printWesternName);
System.out.println("\n=== Eastern Draftee Phone List ===");
pl.stream()
.filter(search.getCriteria(Constants.ALL_DRAFTEES))
.forEach(Person::printEasternName);
System.out.println("\n=== Eastern Pilot Phone List ===");
pl.stream().filter(search.getCriteria(Constants.ALL_PILOTS)).forEach(Person::printEasternName);
}
public void Test1ForEach() {
List<Person> pl = Person.createShortList();
System.out.println("\n=== Western Phone List ===");
pl.forEach(p -> p.printWesternName());
System.out.println("\n=== Eastern Phone List ===");
pl.forEach(Person::printEasternName);
System.out.println("\n=== Custom Phone List ===");
pl.forEach(
p -> {
System.out.println(
p.printCustom(f -> "Name :" + f.getGivenName() + " EMail :" + f.getEmail()));
});
}
// Robo Call Test with Anonymous Function
public void RoboCallTestAnonymous() {
List<Person> pl = Person.createShortList();
RoboContactMethodsAnonymous robo = new RoboContactMethodsAnonymous();
System.out.println("\n=== Robo Call With Anonymous Function ===");
System.out.println("=== Calling all drivers ===");
robo.callDrivers(
pl,
new ITest<Person>() {
@Override
public boolean test(Person p) {
// TODO Auto-generated method stub
return p.getAge() >= 16;
}
});
System.out.println("=== Emailing all draftees ===");
robo.emailDraftees(
pl,
new ITest<Person>() {
@Override
public boolean test(Person p) {
// TODO Auto-generated method stub
return p.getAge() >= 18 && p.getAge() <= 25 && p.getGender() == Gender.MALE;
}
});
System.out.println("=== Mail all pilots ===");
robo.mailPilots(
pl,
new ITest<Person>() {
@Override
public boolean test(Person p) {
// TODO Auto-generated method stub
return p.getAge() >= 23 && p.getAge() <= 65;
}
});
}
// Robo Call Test With Lambda Expression
public void RoboCallTestWithLambda() {
List<Person> pl = Person.createShortList();
RoboContactMethodsLambda robo = new RoboContactMethodsLambda();
System.out.println("\n=== Robo Call With Lambda ===");
// Predicates
Predicate<Person> allDrivers = p -> p.getAge() >= 16;
Predicate<Person> allDraftees =
p -> p.getAge() >= 18 && p.getAge() <= 25 && p.getGender() == Gender.MALE;
Predicate<Person> allPilots = p -> p.getAge() >= 23 && p.getAge() <= 65;
System.out.println("=== Calling all drivers ===");
robo.callDrivers(pl, allDrivers);
System.out.println("=== Emailing all draftees ===");
robo.emailDraftees(pl, allDraftees);
System.out.println("=== Mail all pilots ===");
robo.mailPilots(pl, allPilots);
}
public void NameTestNew() {
System.out.println("\n=== NameTestNew ===");
List<Person> pl = Person.createShortList();
// Print custom first name + email
for (Person person : pl) {
System.out.println(
person.printCustom(p -> "Name: " + p.getGivenName() + " EMail: " + p.getEmail()));
}
// Define Western and Eastern with Lambda
Function<Person, String> westernStyle =
p -> {
return "\nName: "
+ p.getGivenName()
+ " "
+ p.getSurName()
+ "\n"
+ "Age: "
+ p.getAge()
+ " "
+ "Gender: "
+ p.getGender()
+ "\n"
+ "EMail: "
+ p.getEmail()
+ "\n"
+ "Phone: "
+ p.getPhone()
+ "\n"
+ "Address: "
+ p.getAddress();
};
Function<Person, String> easternStyle =
p -> {
return "\nName: "
+ p.getSurName()
+ " "
+ p.getGivenName()
+ "\n"
+ "Age: "
+ p.getAge()
+ " "
+ "Gender: "
+ p.getGender()
+ "\n"
+ "EMail: "
+ p.getEmail()
+ "\n"
+ "Phone: "
+ p.getPhone()
+ "\n"
+ "Address: "
+ p.getAddress();
};
// Print western style
System.out.println("\n=== Western List ===");
for (Person p : pl) {
System.out.println(p.printCustom(westernStyle));
}
System.out.println("\n=== Eastern List ===");
for (Person p : pl) {
System.out.println(p.printCustom(easternStyle));
}
}
