TestGuava

package facilitator.guava;import java.util.Collection;import java.util.Collections;import java.util.Comparator;import java.util.List;import java.util.Map;import org.junit.Test;import com.google.common.base.Function;import com.google.common.base.Predicate;import com.google.common.collect.Collections2;import com.google.common.collect.ComparisonChain;import com.google.common.collect.Lists;import com.google.common.collect.Maps;import com.google.common.collect.Ordering;public class TestGuava {    private static class LengthLessThanPredicate implements Predicate<String> {        private final int length;        private LengthLessThanPredicate(final int length) {            this.length = length;        }        public boolean apply(final String s) {            return s.length() < length;        }    }    public static Predicate<String> lengthLessThan(final int length) {        return new LengthLessThanPredicate(length);    }    @Test    public void testReplace() {        //Map<String, Map<Long, List<String>>> map = new HashMap<String, Map<Long, List<String>>>();        //Map<String, Map<Long, List<String>>> map1 = Maps.newHashMap();        Map<String, Double> cnPrices = Maps.newHashMap();        cnPrices.put("1", 12.00);        cnPrices.put("2", 52.00);        cnPrices.put("3", 99.99);        Map<String, Double> topMap = Maps.transformValues(cnPrices, new Function<Double, Double>() {            Double cn2us = 6.0;            @Override            public Double apply(final Double arg0) {                Double d = (Double) (arg0);                return d * cn2us;            }        });        if (topMap == null || topMap.isEmpty()) {            System.out.println("EMPTY");        }        for (Double d : topMap.values()) {            System.out.println(d);        }        /*        Iterable<String> filtered = filter(names,                    or(or(equalTo("Aleksander"), equalTo("Jaran")), lengthLessThan(5)));*/    }    @Test    public void testSort() {        Comparator<Person> byLastName = new Comparator<Person>() {            @Override            public int compare(Person o1, Person o2) {                return o1.getLastName().compareTo(o2.getLastName());            }        };        Comparator<Person> byFirstName = new Comparator<Person>() {            @Override            public int compare(Person o1, Person o2) {                return o1.getFirstName().compareTo(o2.getFirstName());            }        };        Person p1 = new Person();        p1.setFirstName("zhang");        p1.setLastName("zhenpeng");        Person p2 = new Person();        p2.setFirstName("bai");        p2.setLastName("xue");        Person p3 = new Person();        p3.setFirstName("zhang");        p3.setLastName("keqiang");        Person p4 = new Person();        p4.setFirstName("wang");        p4.setLastName("tao");        Person p5 = new Person();        p5.setFirstName("li");        p5.setLastName("wei");        List<Person> persons = Lists.newArrayList(p1, p2, p3, p4, p5, p2, p5, p1);        List<Person> sortedCopy = Ordering.from(byFirstName).compound(byLastName)            .sortedCopy(persons);        for (Person p : sortedCopy) {            System.out.println(p.getFirstName() + " " + p.getLastName());        }        Collections.sort(persons, new Comparator<Person>() {            @Override            public int compare(Person o1, Person o2) {                return ComparisonChain.start().compare(o1.getFirstName(), o2.getFirstName())                    .compare(o1.getLastName(), o2.getLastName()).result();            }        });        for (Person p : persons) {            System.out.println(p.getFirstName() + " " + p.getLastName());        }        Collection<Person> filterCollection = Collections2.filter(persons, new Predicate<Person>() {            @Override            public boolean apply(Person input) {                return input.getFirstName() == "zhang";            }        });    }}