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test/tools/javac/lambda/methodReference/MethodRef5.java@5ddecb91d843 (annotated)

test/tools/javac/lambda/methodReference/MethodRef5.java

Tue, 12 Mar 2013 16:02:43 +0000

author

mcimadamore

date

Tue, 12 Mar 2013 16:02:43 +0000

changeset 1628

5ddecb91d843

parent 0

959103a6100f

permissions

-rw-r--r--

8009545: Graph inference: dependencies between inference variables should be set during incorporation
Summary: Move all transitivity checks into the incorporation round
Reviewed-by: jjg

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*/
aoqi@0	23
aoqi@0	24	/**
aoqi@0	25	* @test
aoqi@0	26	* @bug 8003280
aoqi@0	27	* @summary Add lambda tests
aoqi@0	28	* Test method reference with SAM interface Comparator<T>
aoqi@0	29	* @compile MethodRef5.java
aoqi@0	30	* @run main MethodRef5
aoqi@0	31	*/
aoqi@0	32
aoqi@0	33	import java.util.Collections;
aoqi@0	34	import java.util.List;
aoqi@0	35	import java.util.ArrayList;
aoqi@0	36
aoqi@0	37	public class MethodRef5 {
aoqi@0	38
aoqi@0	39	static class Person {
aoqi@0	40
aoqi@0	41	private String firstName;
aoqi@0	42	private String lastName;
aoqi@0	43	private int age;
aoqi@0	44
aoqi@0	45	public Person() { }
aoqi@0	46
aoqi@0	47	public Person(String fn, String ln, int a) {
aoqi@0	48	firstName = fn;
aoqi@0	49	lastName = ln;
aoqi@0	50	age = a;
aoqi@0	51	}
aoqi@0	52
aoqi@0	53	public String getLastName() {
aoqi@0	54	return lastName;
aoqi@0	55	}
aoqi@0	56
aoqi@0	57	public int getAge() {
aoqi@0	58	return age;
aoqi@0	59	}
aoqi@0	60
aoqi@0	61	//the following 2 methods are signature-compatible with Comparator<Person>.compare():
aoqi@0	62	public static int compareByAge(Person a, Person b) {
aoqi@0	63	return a.age - b.age;
aoqi@0	64	}
aoqi@0	65
aoqi@0	66	public int compareByLastName(Person a, Person b) {
aoqi@0	67	return a.lastName.compareToIgnoreCase(b.lastName);
aoqi@0	68	}
aoqi@0	69	}
aoqi@0	70
aoqi@0	71	private static void assertTrue(boolean cond) {
aoqi@0	72	if (!cond)
aoqi@0	73	throw new AssertionError();
aoqi@0	74	}
aoqi@0	75
aoqi@0	76	public static void main(String[] args) {
aoqi@0	77
aoqi@0	78	List<Person> persons = new ArrayList<Person>();
aoqi@0	79	persons.add(new Person("John", "Smith", 49));
aoqi@0	80	persons.add(new Person("Abraham", "Lincoln", 30));
aoqi@0	81	persons.add(new Person("George", "Washington", 29));
aoqi@0	82	persons.add(new Person("Peter", "Derby", 50));
aoqi@0	83	Collections.sort(persons, Person::compareByAge);//static method reference to compareByAge(Person, Person)
aoqi@0	84	String age = "";
aoqi@0	85	for (Person p : persons) {
aoqi@0	86	age += p.getAge() + " ";
aoqi@0	87	}
aoqi@0	88	assertTrue( (age.equals("29 30 49 50 ")) );
aoqi@0	89	Collections.sort(persons, new Person()::compareByLastName);//instance method reference to compareByLastName(Person, Person)
aoqi@0	90	String lastName = "";
aoqi@0	91	for (Person p : persons) {
aoqi@0	92	lastName += p.getLastName() + " ";
aoqi@0	93	}
aoqi@0	94	assertTrue( lastName.equals("Derby Lincoln Smith Washington ") );
aoqi@0	95	}
aoqi@0	96	}