Programming/Java
Do not use loop for list iterations - lamdaj
halatha
2011. 4. 29. 05:42
2011/04/26 - [Programming/Java] - Do not use loops for list operations
2011/04/28 - [Programming/Java] - Do not use loops for list operations
2011/04/28 - [Programming/Java] - Do not use loops for list operations
import java.util.ArrayList; import java.util.List; import com.google.common.collect.Lists; import ch.lambdaj.Lambda; import static org.hamcrest.Matchers.greaterThan; // item 3 from http://codemonkeyism.com/generation-java-programming-style // -cp .:./Guava/guava-r09/guava-r09.jar:./lambdaj-2.3.2-with-dependencies.jar public class TestFilter { public static void main(final String[] args) { List<Person> persons = Lists.newArrayList( new Person("A", 15), new Person("B", 16), new Person("C", 17)); List<Person> beerDrinkers = // http://code.google.com/p/lambdaj Lambda.select(persons, Lambda.having(Lambda.on(Person.class).getAge(), greaterThan(16))); } } interface HasAge { public int getAge(); } class Person implements HasAge { public final String name; public final int age; public Person(String name, int age) { this.name = name; this.age = age; } public int getAge() { return this.age; } public String toString(){ return name + " = " + age; } }