1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/tools/javac/lambda/methodReference/MethodRef5.java Sat Nov 17 19:01:03 2012 +0000
1.3 @@ -0,0 +1,96 @@
1.4 +/*
1.5 + * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + */
1.26 +
1.27 +/**
1.28 + * @test
1.29 + * @bug 8003280
1.30 + * @summary Add lambda tests
1.31 + * Test method reference with SAM interface Comparator<T>
1.32 + * @compile MethodRef5.java
1.33 + * @run main MethodRef5
1.34 + */
1.35 +
1.36 +import java.util.Collections;
1.37 +import java.util.List;
1.38 +import java.util.ArrayList;
1.39 +
1.40 +public class MethodRef5 {
1.41 +
1.42 + static class Person {
1.43 +
1.44 + private String firstName;
1.45 + private String lastName;
1.46 + private int age;
1.47 +
1.48 + public Person() { }
1.49 +
1.50 + public Person(String fn, String ln, int a) {
1.51 + firstName = fn;
1.52 + lastName = ln;
1.53 + age = a;
1.54 + }
1.55 +
1.56 + public String getLastName() {
1.57 + return lastName;
1.58 + }
1.59 +
1.60 + public int getAge() {
1.61 + return age;
1.62 + }
1.63 +
1.64 + //the following 2 methods are signature-compatible with Comparator<Person>.compare():
1.65 + public static int compareByAge(Person a, Person b) {
1.66 + return a.age - b.age;
1.67 + }
1.68 +
1.69 + public int compareByLastName(Person a, Person b) {
1.70 + return a.lastName.compareToIgnoreCase(b.lastName);
1.71 + }
1.72 + }
1.73 +
1.74 + private static void assertTrue(boolean cond) {
1.75 + if (!cond)
1.76 + throw new AssertionError();
1.77 + }
1.78 +
1.79 + public static void main(String[] args) {
1.80 +
1.81 + List<Person> persons = new ArrayList<Person>();
1.82 + persons.add(new Person("John", "Smith", 49));
1.83 + persons.add(new Person("Abraham", "Lincoln", 30));
1.84 + persons.add(new Person("George", "Washington", 29));
1.85 + persons.add(new Person("Peter", "Derby", 50));
1.86 + Collections.sort(persons, Person::compareByAge);//static method reference to compareByAge(Person, Person)
1.87 + String age = "";
1.88 + for (Person p : persons) {
1.89 + age += p.getAge() + " ";
1.90 + }
1.91 + assertTrue( (age.equals("29 30 49 50 ")) );
1.92 + Collections.sort(persons, new Person()::compareByLastName);//instance method reference to compareByLastName(Person, Person)
1.93 + String lastName = "";
1.94 + for (Person p : persons) {
1.95 + lastName += p.getLastName() + " ";
1.96 + }
1.97 + assertTrue( lastName.equals("Derby Lincoln Smith Washington ") );
1.98 + }
1.99 +}
